Friday, December 30, 2016

The python arch module for financial econometrics.

This python module arch: is a work-in-progress for ARCH and other tools for financial econometrics, written in Python (and Cython).
The arch python module come with tools for:
  •    Univariate volatility models
  •    Bootstrapping
  •    Multiple comparison procedures
  •    Unit root tests
You can read and see many examples here.
Let's start with instalation into my python 2.7.12 version.
First you need to install this python module with pip tool:
C:\Python27\Scripts>pip install Arch
Collecting Arch
Downloading arch-4.0.tar.gz (107kB)
100% |################################| 112kB 390kB/s
Requirement already satisfied: matplotlib>=1.4 in c:\python27\lib\site-packages (from Arch)
Requirement already satisfied: scipy>=0.15 in c:\python27\lib\site-packages (from Arch)
Collecting patsy>=0.2 (from Arch)
Downloading patsy-0.4.1-py2.py3-none-any.whl (233kB)
100% |################################| 235kB 906kB/s
Collecting statsmodels>=0.6 (from Arch)
Downloading statsmodels-0.6.1.tar.gz (7.0MB)
100% |################################| 7.0MB 85kB/s
Collecting pandas>=0.16 (from Arch)
Downloading pandas-0.19.2-cp27-cp27m-win32.whl (6.8MB)
100% |################################| 6.8MB 81kB/s
Requirement already satisfied: numpy>=1.6 in c:\python27\lib\site-packages (from matplotlib>=1.4->Arch)
Requirement already satisfied: python-dateutil in c:\python27\lib\site-packages (from matplotlib>=1.4->Arch)
Requirement already satisfied: cycler in c:\python27\lib\site-packages (from matplotlib>=1.4->Arch)
Requirement already satisfied: pyparsing!=2.0.4,!=2.1.2,>=1.5.6 in c:\python27\lib\site-packages (from matplotlib>=1.4->Arch)
Requirement already satisfied: pytz in c:\python27\lib\site-packages (from matplotlib>=1.4->Arch)
Requirement already satisfied: six in c:\python27\lib\site-packages (from patsy>=0.2->Arch)
Installing collected packages: patsy, pandas, statsmodels, Arch
Running setup.py install for statsmodels ... done
Running setup.py install for Arch ... done
Successfully installed Arch-4.0 pandas-0.19.2 patsy-0.4.1 statsmodels-0.6.1

This python module is very mathematical and technical so I'll refer you to a few examples.
Can be used in statistical research and econometrics, or the application of mathematics, statistics, and computer science to economic data. 

Sunday, December 18, 2016

NVIDIA python module Theano.

I try to use python module Theano.
First I install this python module.
C:\WINDOWS\system32>cd C:\Python27

C:\Python27>cd Scripts

C:\Python27\Scripts>pip install Theano
Collecting Theano
Using cached Theano-0.8.2.tar.gz
Requirement already satisfied: numpy>=1.7.1 in c:\python27\lib\site-packages (from Theano)
Requirement already satisfied: scipy>=0.11 in c:\python27\lib\site-packages (from Theano)
Requirement already satisfied: six>=1.9.0 in c:\python27\lib\site-packages (from Theano)
Installing collected packages: Theano
Running setup.py install for Theano ... done
Successfully installed Theano-0.8.2

When I try to used I got this error:
import theano
WARNING (theano.configdefaults): g++ not detected ! Theano will be unable to execute optimized C-implementations (for both CPU and GPU) and will default to Python implementations. Performance will be severely degraded. To remove this warning, set Theano flags cxx to an empty string.

I try to fix that error, but I don't find any solution.
This python module work. I tested with examples from NVIDIA, see:

Thursday, December 15, 2016

Use the twitter python module - part 002.

Using the twitter python module named python-twitter you can search twitter query into local area.
The default tutorial is here.
The source code to change is that line:
results = api.GetSearch(raw_query="q=from%3Asomething"
with:
results = api.GetSearch(raw_query="q=&geocode=lat,long,10km")
Also you need to put your lat and long and area sized.
The good point of this you will be able to spell time with twitter posts.

Wednesday, December 14, 2016

Use the twitter python module - part 001.

About this python module python-twitter you can read here.

C:\>cd Python27
C:\Python27>cd Scripts
C:\Python27\Scripts>pip install python-twitter
Collecting python-twitter
Downloading python_twitter-3.2-py2-none-any.whl (71kB)
100% |################################| 81kB 292kB/s
Requirement already satisfied: requests in c:\python27\lib\site-packages (from python-twitter)
Requirement already satisfied: requests-oauthlib in c:\python27\lib\site-packages (from python-twitter)
Collecting future (from python-twitter)
Downloading future-0.16.0.tar.gz (824kB)
100% |################################| 829kB 485kB/s
Requirement already satisfied: oauthlib>=0.6.2 in c:\python27\lib\site-packages
(from requests-oauthlib->python-twitter)
Installing collected packages: future, python-twitter
Running setup.py install for future ... done
Successfully installed future-0.16.0 python-twitter-3.2


Let's see one simple example with one authentication key and token and one query:

import os
import json
import twitter
from twitter import *
CONSUMER_KEY=""
CONSUMER_SECRET=""

ACCESS_TOKEN=""
ACCESS_TOKEN_SECRET=""

api = Api(CONSUMER_KEY,
          CONSUMER_SECRET,
          ACCESS_TOKEN,
          ACCESS_TOKEN_SECRET)
def main():
    with open('output.txt', 'a') as f:
        for line in api.GetStreamFilter(track='something', languages=LANGUAGES):
            print line
    results = api.GetSearch(raw_query="q=from%3Asomething")
    print results
if __name__ == '__main__':
    main()

Monday, December 12, 2016

Use the tweepy to deal with twitter api - part 001.

I will show you how to install the python module named tweepy  and how to make authentication into twitter webpage.
This will install the tweepy python module.
C:\>cd Python27
C:\Python27>cd Scripts
C:\Python27\Scripts>pip install tweepy
Collecting tweepy
Downloading tweepy-3.5.0-py2.py3-none-any.whl
Collecting requests>=2.4.3 (from tweepy)
Downloading requests-2.12.3-py2.py3-none-any.whl (575kB)
100% |################################| 583kB 556kB/s
Collecting requests-oauthlib>=0.4.1 (from tweepy)
Downloading requests_oauthlib-0.7.0-py2.py3-none-any.whl
Requirement already satisfied: six>=1.7.3 in c:\python27\lib\site-packages (from
tweepy)
Collecting oauthlib>=0.6.2 (from requests-oauthlib>=0.4.1->tweepy)
Downloading oauthlib-2.0.1.tar.gz (122kB)
100% |################################| 133kB 506kB/s
Installing collected packages: requests, oauthlib, requests-oauthlib, tweepy
Running setup.py install for oauthlib ... done
Successfully installed oauthlib-2.0.1 requests-2.12.3 requests-oauthlib-0.7.0 tweepy-3.5.0

To deal with twitter api then you need to create a new application into this webpage.
This webpage will give for authentication your date to connect to twitter:
Application Settings
consumer_key=""
consumer_secret=""

Your Access Token
access_token=""
access_token_secret=""

Let's start with a simple example, by using your application settings and access token:
import tweepy
from tweepy.streaming import StreamListener
from tweepy import OAuthHandler
from tweepy import Stream

consumer_key=""
consumer_secret=""

access_token=""
access_token_secret=""

auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
auth.set_access_token(access_token, access_token_secret)

api = tweepy.API(auth)

print(api.me().name)

class StdOutListener(StreamListener):
""" A listener handles tweets that are received from the stream.
This is a basic listener that just prints received tweets to stdout.
"""
def on_data(self, data):
print(data)
return True

def on_error(self, status):
print(status)

if __name__ == '__main__':
lista = StdOutListener()
auth = OAuthHandler(consumer_key, consumer_secret)
auth.set_access_token(access_token, access_token_secret)

stream = Stream(auth, lista)
stream.filter(track=['internet'])

Using python shell to run this script will show all about 'internet'.
The output will come into raw format.
Let's try another example to update your status with this message:
I using OAuth authentication via Tweepy!
Just add this into my code before class definition:
api.update_status(status='I using OAuth authentication via Tweepy!')
You can rad more about streaming by reading this docs.
For example, I used track from here.



Sunday, December 11, 2016

The morse python module with pip installation versus precompiled archive wheel.

Today I try to deal with morse python module and it took me a while to install python modules because of their dependencies.
I started with the pip install of morse module but I got dependency errors in python modules
Because I try to fix this issue the result of this tutorial is more about how to install some python module: matplotlib, scipy, numpy, mkl and morse.
The all installation process will help you to understand how can be fix some pip installation versus precompiled archive wheel.
C:\Python27\Scripts>pip install matplotlib
Collecting matplotlib
  Downloading matplotlib-1.5.3-cp27-cp27m-win32.whl (6.0MB)
    100% |################################| 6.0MB 98kB/s
Requirement already satisfied: numpy>=1.6 in c:\python27\lib\site-packages (from
 matplotlib)
Collecting python-dateutil (from matplotlib)
  Downloading python_dateutil-2.6.0-py2.py3-none-any.whl (194kB)
    100% |################################| 194kB 1.4MB/s
Collecting cycler (from matplotlib)
  Downloading cycler-0.10.0-py2.py3-none-any.whl
Collecting pyparsing!=2.0.4,!=2.1.2,>=1.5.6 (from matplotlib)
  Downloading pyparsing-2.1.10-py2.py3-none-any.whl (56kB)
    100% |################################| 61kB 2.0MB/s
Collecting pytz (from matplotlib)
  Downloading pytz-2016.10-py2.py3-none-any.whl (483kB)
    100% |################################| 491kB 656kB/s
Collecting six>=1.5 (from python-dateutil->matplotlib)
  Downloading six-1.10.0-py2.py3-none-any.whl
Installing collected packages: six, python-dateutil, cycler, pyparsing, pytz, ma
tplotlib
Successfully installed cycler-0.10.0 matplotlib-1.5.3 pyparsing-2.1.10 python-da
teutil-2.6.0 pytz-2016.10 six-1.10.0

Download SciPy wheel file from here.
Install this file with:
C:\Python27\Scripts>pip install scipy-0.18.1-cp27-cp27m-win32.whl
Processing c:\python27\scripts\scipy-0.18.1-cp27-cp27m-win32.whl
Installing collected packages: scipy
Successfully installed scipy-0.18.1

Now you can install morse pyhon module.
pip install morse
If you installed the numpy by pip, but the scipy was installed by precompiled archive then expects numpy+mkl.
So to fix that issue, I download the numpy-1.12.0b1+mkl-cp27-cp27m-win32.whl file and install this with pip:
C:\Python27\Scripts>pip install "numpy-1.12.0b1+mkl-cp27-cp27m-win32.whl"
Processing c:\python27\scripts\numpy-1.12.0b1+mkl-cp27-cp27m-win32.whl
Installing collected packages: numpy
Found existing installation: numpy 1.11.2
Uninstalling numpy-1.11.2:
Successfully uninstalled numpy-1.11.2
Successfully installed numpy-1.12.0b1+mkl

Let's test the morse python module.
C:\Python27>python
Python 2.7.12 (v2.7.12:d33e0cf91556, Jun 27 2016, 15:19:22) [MSC v.1500 32 bit (
Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import morse
>>> dir(morse)
['__builtins__', '__doc__', '__file__', '__name__', '__package__', 'lookup', 'st
ring_to_morse']
>>> dir(morse.lookup)
['__class__', '__cmp__', '__contains__', '__delattr__', '__delitem__', '__doc__'
, '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__gt__',
'__hash__', '__init__', '__iter__', '__le__', '__len__', '__lt__', '__ne__', '_
_new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__setitem__'
, '__sizeof__', '__str__', '__subclasshook__', 'clear', 'copy', 'fromkeys', 'get
', 'has_key', 'items', 'iteritems', 'iterkeys', 'itervalues', 'keys', 'pop', 'po
pitem', 'setdefault', 'update', 'values', 'viewitems', 'viewkeys', 'viewvalues']
>>> print morse.lookup.keys()
['"', '$', '&', '(', ',', '.', '0', '2', '4', '6', '8', ':', '@', 'B', 'D', 'F',
'H', 'J', 'L', 'N', 'P', 'R', 'T', 'V', 'X', 'Z', '!', "'", ')', '+', '-', '/',
'1', '3', '5', '7', '9', ';', '=', '?', 'A', 'C', 'E', 'G', 'I', 'K', 'M', 'O',
'Q', 'S', 'U', 'W', 'Y', '_']
>>> print morse.lookup.items()
[('"', '.-..-.'), ('$', '...-..-'), ('&', '.-...'), ('(', '-.--.'), (',', '--..-
-'), ('.', '.-.-.-'), ('0', '-----'), ('2', '..---'), ('4', '....-'), ('6', '-..
..'), ('8', '---..'), (':', '---...'), ('@', '.--.-.'), ('B', '-...'), ('D', '-.
.'), ('F', '..-.'), ('H', '....'), ('J', '.---'), ('L', '.-..'), ('N', '-.'), ('
P', '.--.'), ('R', '.-.'), ('T', '-'), ('V', '...-'), ('X', '-..-'), ('Z', '--..
'), ('!', '-.-.--'), ("'", '.----.'), (')', '-.--.-'), ('+', '.-.-.'), ('-', '-.
...-'), ('/', '-..-.'), ('1', '.----'), ('3', '...--'), ('5', '.....'), ('7', '-
-...'), ('9', '----.'), (';', '-.-.-.'), ('=', '-...-'), ('?', '..--..'), ('A',
'.-'), ('C', '-.-.'), ('E', '.'), ('G', '--.'), ('I', '..'), ('K', '-.-'), ('M',
'--'), ('O', '---'), ('Q', '--.-'), ('S', '...'), ('U', '..-'), ('W', '.--'), (
'Y', '-.--'), ('_', '..--.-')]

You can see the python morse module is working well.

LibreOffice and python scripts.

I try to deal with python scripts under LibreOffice applications.
The full tutorial can be found here: Python and LibreOffice – part 001.
I will come with new tutorials about LibreOffice and python.

Saturday, December 10, 2016

The python modules pygobject, pycairo and pygtk under Windows OS.

I used the python version 2.7 32 bits under .
C:\Python27>python
Python 2.7.12 (v2.7.12:d33e0cf91556, Jun 27 2016, 15:19:22) [MSC v.1500 32 bit (
Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

The issue is to instal PyGTK python module but you can see I got errors.
C:\>cd Python27

C:\Python27>cd script
The system cannot find the path specified.

C:\Python27>cd Scripts

C:\Python27\Scripts>pip install PyGTK
Collecting PyGTK
Downloading pygtk-2.24.0.tar.bz2 (2.4MB)
100% |################################| 2.4MB 224kB/s
Complete output from command python setup.py egg_info:
ERROR: Could not import dsextras module: Make sure you have installed pygobj
ect.

----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in c:\users\my_account
\appdata\local\temp\pip-build-os60hf\PyGTK\

C:\Python27\Scripts>pip install pygobject
Collecting pygobject
Downloading pygobject-2.28.3.tar.bz2 (889kB)
100% |################################| 890kB 550kB/s
Complete output from command python setup.py egg_info:
ERROR: Could not find pkg-config: Please check your PATH environment variabl
e.

----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in c:\users\my_account
\appdata\local\temp\pip-build-lt0gbh\pygobject\

I got the pygobject-2.28.3.win32-py2.7.msi, pycairo-1.8.10.win32-py2.7.msi and pygtk-2.24.0.win32-py2.7.msi from gnome website.
I install this python modules using registry and this option: Python from another location and I set my python path: C:\Python27\
>>> import gobject
>>> dir(gobject)
['GBoxed', 'GEnum', 'GError', 'GFlags', 'GInterface', 'GObject', 'GObjectMeta',
...
>>> import cairo
>>> dir(cairo)
['ANTIALIAS_DEFAULT', 'ANTIALIAS_GRAY', 'ANTIALIAS_NONE', 'ANTIALIAS_SUBPIXEL',
>>> import pygtk
>>> dir(pygtk)
['__all__', '__builtins__', '__doc__', '__file__', '__name__', '__package__', '_
get_available_versions', '_our_dir', '_pygtk_2_0_dir', '_pygtk_dir_pat', '_pygtk
_required_version', 'fnmatch', 'glob', 'os', 'require', 'require20', 'sys']


As you can see this python modules works well.


Thursday, December 8, 2016

Noise 2D, 3D, 4D with opensimplex python module.

OpenSimplex noise is an n-dimensional gradient noise function that was developed in order to overcome the patent-related issues surrounding Simplex noise, while continuing to also avoid the visually-significant directional artifacts characteristic of Perlin noise.
Let's start with instalation:
C:\Python27\Scripts>pip install OpenSimplex
Collecting OpenSimplex
Downloading opensimplex-0.2.tar.gz
Installing collected packages: OpenSimplex
Running setup.py install for OpenSimplex ... done
Successfully installed OpenSimplex-0.2

Test some examples from official page:
C:\Python27>python
Python 2.7.12 (v2.7.12:d33e0cf91556, Jun 27 2016, 15:19:22) [MSC v.1500 32 bit (
Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from opensimplex import OpenSimplex
>>> tmp = OpenSimplex()
>>> print (tmp.noise2d(x=10, y=10))
-0.297251513589
>>> tmp = OpenSimplex(seed=1)
>>> print (tmp.noise2d(x=10, y=10))
-0.734782324747
>>> dir(OpenSimplex)
['__class__', '__delattr__', '__dict__', '__doc__', '__format__', '__getattribut
e__', '__hash__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_e
x__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '_
_weakref__', '_extrapolate2d', '_extrapolate3d', '_extrapolate4d', 'noise2d', 'n
oise3d', 'noise4d']

Let's make a image example with noise 2D:
from opensimplex import OpenSimplex
from PIL import Image

height = int(input("Enter in the map height: "))
width = int(input("Enter in the map width: "))

def main():
    simplex = OpenSimplex()
    im = Image.new('L', (width, height))
    for y in range(0, height):
        for x in range(0, width):
            value = simplex.noise2d(x , y )
            color = int((value + 1) * 128)
            im.putpixel((x, y), color)
    im.save('noise2d.png')
    im.show()
if __name__ == '__main__':
    main()

Tuesday, December 6, 2016

The python-nmap python module fail.

You can read about this python module here.

First let's install this python module.
C:\Python27>cd Scripts

C:\Python27\Scripts>pip install python-nmap
Collecting python-nmap
Downloading python-nmap-0.6.1.tar.gz (41kB)
100% |################################| 51kB 240kB/s
Installing collected packages: python-nmap
Running setup.py install for python-nmap ... done
Successfully installed python-nmap-0.6.1

About this python-nmap version you can read here.
I try to run the example source code but not of this example working.
For example I got this:
>>> nm.scan('127.0.0.1', '22-443')
{'nmap': {'scanstats': {'uphosts': '1', 'timestr': 'Wed Dec 07 08:13:01 2016', '
downhosts': '-1', 'totalhosts': '0', 'elapsed': '10.74'}, 'scaninfo': {'tcp': {'
services': '22-443', 'method': 'syn'}, 'error': [u'dnet: Failed to open device l
o0\r\nQUITTING!\r\n', u'dnet: Failed to open device lo0\r\nQUITTING!\r\n']}, 'co
mmand_line': 'nmap -oX - -p 22-443 -sV 127.0.0.1'}, 'scan': {}}

Thursday, December 1, 2016

Python 3.4 and Flask module - part 001.

This is a simple tutorial about how to install Flask python module under python 3.4 .
I think this can also working with any python 3.x versions.
Flask is a microframework for creating web applications.
First you need to install your python 3.4 and then you will get the pip script from here.
About pip you can read more on the pip webpage.
Run the pip install:
python get-pip.py

Go to into your Python folder and start the pip installation of Flask python module.
C:\Python34>cd Scripts
C:\Python34\Scripts>pip install Flask
Downloading/unpacking Flask

This is the first step. The next step is to start the default webpage.
Using python command shell you can test the Flask python module.

>>> from flask import Flask
>>>
>>> app = Flask(__name__)
>>>
>>> @app.route('/')
... def homepage():
... return "Hi there, how ya doin?"
...
>>>
>>> if __name__ == "__main__":
... app.run()
...
* Running on http://127.0.0.1:5000/
127.0.0.1 - - [26/Sep/2014 23:25:01] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [26/Sep/2014 23:25:02] "GET /favicon.ico HTTP/1.1" 404 -


As you can see is running into browser at http://127.0.0.1:5000 .
Let's put this into one python script.
You need to make a new folder called FlaskApp and go to this folder.
Make a new script named app.py with the source code you tested.
Now you can just run the script and all will be working well.
Flask looks for template files inside the templates folder.
Go to the folder FlaskApp and create a folder called templates.
Now, create a file called index.html and fill with you html source code.
To call this index.html you need to add this line of source code ino your script:
from flask import Flask, render_template and
def main():
return render_template('index.html')

Start your python script and you will see the content of your index.html.

Wednesday, November 30, 2016

OpenGL and OpenCV with python 2.7 - part 004.

Today I will continue the series of graphics processing in OpenGL and OpenCV.
The goal of this tutorial is the download and load into the python script of youtube video.
To do that we need another two modules python.
First, I download and install the python 2.7.12 32 bit version from internet.
C:\Python27>python.exe
Python 2.7.12 (v2.7.12:d33e0cf91556, Jun 27 2016, 15:19:22) [MSC v.1500 32 bit (
Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

First update the pip tool and install numpy python module:
C:\Python27\Scripts>python -m pip install --upgrade pip
Collecting pip
Downloading pip-9.0.1-py2.py3-none-any.whl (1.3MB)
100% |################################| 1.3MB 419kB/s
Installing collected packages: pip
Found existing installation: pip 8.1.1
Uninstalling pip-8.1.1:
Successfully uninstalled pip-8.1.1
Successfully installed pip-9.0.1
C:\Python27\Scripts>pip install numpy
Collecting numpy
Downloading numpy-1.11.2-cp27-none-win32.whl (6.5MB)
100% |################################| 6.5MB 79kB/s
Installing collected packages: numpy
Successfully installed numpy-1.11.2

The main reason to have the numpy python module: it is often used with OpenCV python module.
For OpenCV python module installation you need to see my tutorial.
After you install it, test the OpenCV python module:
C:\Python27>python.exe
Python 2.7.12 (v2.7.12:d33e0cf91556, Jun 27 2016, 15:19:22) [MSC v.1500 32 bit (
Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
>>> print cv2.__version__
3.0.0

Install pafy python module.
This module help you to download video from youtube but you need also the youtube-dl python module.
So lets install the youtube-dl and pafy python modules.
C:\Python27>cd Scripts
C:\Python27\Scripts>pip install youtube-dl
Collecting youtube-dl
Downloading youtube_dl-2016.12.1-py2.py3-none-any.whl (1.5MB)
100% |################################| 1.5MB 377kB/s
Installing collected packages: youtube-dl
Successfully installed youtube-dl-2016.12.1
C:\Python27\Scripts>pip install pafy
Collecting pafy
Downloading pafy-0.5.2-py2.py3-none-any.whl
Installing collected packages: pafy
Successfully installed pafy-0.5.2

I make a simple python script named: get_yt.py.
The source code of this script is simple:
import os
import pafy
# Download the video
video = pafy.new('https://www.youtube.com/watch?v=O5VCjktWVD4')
print "video.title"
print video.title
print "video.rating"
print video.rating
print "video.viewcount, video.author, video.length"
print video.viewcount, video.author, video.length
print "video.duration, video.likes, video.dislikes"
print video.duration, video.likes, video.dislikes
print "video.description"
print video.description
resolution = video.getbestvideo(preftype="mp4")
print "resolution"
print resolution
input_movie = resolution.download(quiet=False)
print "input_movie"
print input_movie
print "delete movie"
os.remove(input_movie)

I used the url of videoclip from youtube channel of Arden Cho to tested.
If you want to keep the video into your folder just remove the last line from the python script.
The result is this output:
C:\Python27>python.exe get_yt.py
video.title
Can't Help Falling in Love With You - Arden Cho
video.rating
4.99041318893
video.viewcount, video.author, video.length
10980 ardenBcho 168
video.duration, video.likes, video.dislikes
00:02:48 1665 4
video.description
Recorded this song a couple months ago when I was in Boston, this song always re
minds me of holidays and love so sharing that with you!

Guitar by Koo Chung https://youtube.com/koochung
Violin and Video editing/production by Daniel Jang https://www.youtube.com/metal
sides
Production + Keys by Tim Bongiovanni https://www.northgateproductions.net
Filmed by Rob Mark https://www.instagram.com/rmarq_

If you like my music comment and SHARE! You can also support me by buying & rati
ng my album on iTunes!! https://itunes.apple.com/us/album/my-true-happy/id592588
859

You can follow me at: SnapChat: ardencho
http://www.instagram.com/arden_cho
http://www.facebook.com/hiardencho
http://www.twitter.com/arden_cho
http://www.imdb.me/ardencho
resolution
video:mp4@1920x1080
input_movie5 Bytes [100.00%] received. Rate: [5371 KB/s]. ETA: [0 secs]
Can't Help Falling in Love With You - Arden Cho.mp4
delete movie


Sunday, November 6, 2016

Python and OAuth2 with Google API.


If you want to do this then is simple to do. The most complex part come from google settings.
But that can be easy if you make it from few times.
I used OAuth2 with json file to make authentification.
You can see my full tutorial here.

Sunday, October 23, 2016

Using text file with python 2.7 .

This simple tutorial is about text file. The text file come with txt extension.
It is a file containing text that can be used and further processing by functions and modules python.
I used Tkinter python module. The reason I chose this python mpodule is:
  • old python module;
  • rapidly developing graphical interfaces.
First step is to import the python module and then to put all of dir command into one text file.
The name of this file is: Tkinter_funct.txt
Open your python and try this source code:
C:\Python27>python.exe
Python 2.7.8 (default, Jun 30 2014, 16:08:48) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import Tkinter
>>> from Tkinter import *
>>> Tkinter_all=dir(Tkinter)
>>> Tkinter_file=open('Tkinter_funct.txt','w')
>>> Tkinter_file.write(str(Tkinter_all))
>>> print Tkinter_all

You will see the content of dir python module.
The text file is also have this text output.
To read the file is need to open the file with open function, to put position for read by using seek function and to read with read function.
This example will show you how is working:
>>> test=open('Tkinter_funct.txt','r+')
>>> test.seek(1)
>>> test.read()

Will open the file named Tkinter_funct.txt and r+ access to file.
The position it is set to 1.
The read function make all with full content output.
Now let's see the next steps, by change the read and seek values.

>>> test.read(1)
''
>>> test.read(2)
''
>>> test.read(10)
''
>>> test.seek(2)
>>> test.read(1)
'A'
>>> test.read(10)
"CTIVE', 'A"
>>> test.read(20)
"LL', 'ANCHOR', 'ARC'"

This outputs come with parts of all content and show you how it's working.

Monday, October 3, 2016

The python CacheControl module - part 002.

Today was a hard day and this is the reason I make this short tutorial.
Teory of HTTP:
HTTP specifies four response cache headers that you can set to enable caching:
  • Cache-Control
  • Expires
  • ETag
  • Last-Modified
These four headers are used to help cache your responses into two different models:
  • Expiration Caching - used to cache your entire response for a specific amount of time (e.g. 24 hours), simple, but cache invalidation is more difficult;
  • Validation Caching - this is more complex and used to cache your response, but allows you to dynamically invalidate it as soon as your content changes.
First you need to know about this code is a raw example about how we can access cache of the page.
Come with a simple class named DictCache. You can named with any name and is a BaseCache class.
The next step I make is to show you how can access it.
One simpe way is to see the page - first session.
The complex come when you need to access for example data and info like:
 'adapters', 'auth', 'cert', 'close', 'cookies', 'delete', 'get', 'get_adapter', 'head', 'headers', 'hooks', 'max_redirects', 'merge_environment_settings', 'mount', 'options', 'params', 'patch', 'post', 'prepare_request', 'proxies', 'put', 'rebuild_auth', 'rebuild_method', 'rebuild_proxies', 'redirect_cache', 'request', 'resolve_redirects', 'send', 'stream', 'trust_env', 'verify'
And this is come with teh second session from this source code:

import requests
from cachecontrol import CacheControl
from cachecontrol.cache import BaseCache

class DictCache(BaseCache):

    def __init__(self, init_dict=None):
        self.data = init_dict or {}

    def get(self, key):
        return self.data.get(key, None)

    def set(self, key, value):
        self.data.update({key: value})

    def delete(self, key):
        self.data.pop(key)

print "first session requests"
sess = requests.session()
cached_sess = CacheControl(sess)
response = cached_sess.get('http://google.com')
print '=================='
print 'see page by add this: print response.text'
print '=================='
print "second session BaseCache"
sess2 = requests.session()
base=DictCache(sess2)
print '=================='
print "dir(base)"
print dir(base)
print '=================='
print"dir(base.data)"
print dir(base.data)
print '=================='
print"base.data.max_redirects"
print base.data.max_redirects
print '=================='

Sunday, October 2, 2016

The python CacheControl module - part 001.

This tutorials series want to be a better approach to understand the several mechanisms that HTTP provides for web cache validation. Let's start with the first part.
You can install it with pip
C:\>cd Python27
C:\Python27>cd Scripts
C:\Python27\Scripts>pip install cachecontrol
Collecting cachecontrol
  Downloading CacheControl-0.11.7.tar.gz
Requirement already satisfied (use --upgrade to upgrade): 
requests in c:\python27\lib\site-packages (from cachecontrol)
Building wheels for collected packages: cachecontrol
  Running setup.py bdist_wheel for cachecontrol ... done
  Stored in directory: C:\Users\GeorgeCatalin\AppData\Local\pip\\
Cache\wheels\9b\94\d2\1793b004461b5bc238a89e260cd2b9f770437c42424fdd0943
Successfully built cachecontrol
Installing collected packages: cachecontrol
Successfully installed cachecontrol-0.11.7
First test come with the default example and show all with the text.
import requests
from cachecontrol import CacheControl
sess = requests.session()
cached_sess = CacheControl(sess)
response = cached_sess.get('http://google.com')
print response

print response.text
...
The requests python module is an Apache2 Licensed HTTP library to allow you to send HTTP/1.1 requests.
This help you to add headers, form data, multipart files, and parameters with simple
Python dictionaries, and access the response data in the same way.

The theory part.
You can use CacheControl with the basic wrapper way or via a requests Transport Adapter.
The Transport Adapters provide a mechanism to define interaction methods for an HTTP service.
The code will come with this template (docs example):
sess = requests.Session()
sess.mount('http://', CacheControlAdapter())
This mean the CacheControl assumes you are using a requests.Session for your requests.
So the Transport Adapter will cover the HTTPCore and WSGICore.
Now, both (the wrapper and adapter classes) allow providing a custom cache store object.
This is used for storing your cached data.
The next step will be
from cachecontrol.caches import FileCache
sess = CacheControl(requests.Session(),
                    cache=FileCache('.webcache'))
The result will create a directory called .webcache and store a file for each cached request.
Also the CacheControl python module comes with a few storage backends for storing your cache objects.
First is DictCache is the default cache, next is FileCache is similar to the caching mechanism provided by httplib2 and the last is RedisCache uses a Redis database to store values.
One note about requesting the filecache extra can use dependency with: pip install cachecontrol[filecache].
The CacheControl’s support of ETags by returns a response with the appropriate If-None-Match header.
Seem the ETag support only takes effect when the time has expired.
The ETag or entity tag, is part of HTTP, the protocol for the World Wide Web and provides for web cache validation. You can also take a look at Hypertext Transfer Protocol (HTTP/1.1): Caching.
The documentation of cachecontrol python module told us:
Caching is hard! It is considered one of the great challenges of computer science.
Yes! you can agree with that, because some parts need to be understand well.
This issues: Timezones, Cached Responses and Query String Params are the most important parts.

Any info about this issue will be grea, just put your comments.



Another simple effect with pygame.

The pygame module come with many features for users.
I used the pygame version to make one simple tutorial about pallete functions :
>>> print pygame.version.ver
1.9.2b1

The result of my tutorial is this:


Thursday, September 22, 2016

Another learning python post with pygame.

This is a simple python script with pygame python module.
I make it for for educational purposes for the children.
I used words into romanian language for variables, functions and two python class.
See this tutorial here
pygame python

Thursday, September 8, 2016

OpenGL and OpenCV with python 2.7 - part 003.

If you have seen the last tutorial about OpenCV, then this tutorial comes to complete with one source code.

This source code will cut the backgroud of webcam.



The webcam output is take by VideoCapture function.
This part of source code: np.zeros((1,65),np.float64) will return a new array of given shape and type, filled with zeros.
The result of this parts is used with function grabCut from cv2 python module.
This is the source code:
import numpy as np
import cv2
cap = cv2.VideoCapture(0)
while(True):
    ret, img = cap.read()
    #img = cv2.imread('test002.jpg')
    mask = np.zeros(img.shape[:2],np.uint8)

    bgdModel = np.zeros((1,65),np.float64)
    fgdModel = np.zeros((1,65),np.float64)

    rect = (50,50,450,290)
    cv2.grabCut(img,mask,rect,bgdModel,fgdModel,5,cv2.GC_INIT_WITH_RECT)

    mask2 = np.where((mask==2)|(mask==0),0,1).astype('uint8')
    img = img*mask2[:,:,np.newaxis]
    cv2.imshow('frame',img)
    if 0xFF & cv2.waitKey(5) == 27:
        break
cap.release()
cv2.destroyAllWindows()
The end result will be something like:

Saturday, August 27, 2016

The python dizzy with clean instalation, is true !?

This will refer the python 2.7 working - but it can be extrapolated to other versions.
Many users have trouble installing python modules. The problem comes from old modules outdated or those who did not support.
I will present a few examples. I hope to come and support as necessary to remedy in time or exclusion through better solutions.
This is the main question for today: The python dizzy with clean instalation, is true !?
I don't think is a unwanted hacking of my python instalation using internet.
But I search and I saw many questions and erros over pip and Scripts folders.
I will deal just for this issue:
After I make one clean python 2.7 and all my python modules works well I used my windows to deal with some ssh software.
The next step I make it with python was to try to update with pip.
The strange think is with this files from Scripts folders:
12-Aug-16 06:41 PM 98,150 pyrsa-decrypt-bigfile.exe
12-Aug-16 06:41 PM 98,134 pyrsa-decrypt.exe
12-Aug-16 06:41 PM 98,150 pyrsa-encrypt-bigfile.exe
12-Aug-16 06:41 PM 98,134 pyrsa-encrypt.exe
12-Aug-16 06:41 PM 98,132 pyrsa-keygen.exe
12-Aug-16 06:41 PM 98,155 pyrsa-priv2pub.exe
12-Aug-16 06:41 PM 98,128 pyrsa-sign.exe
12-Aug-16 06:41 PM 98,132 pyrsa-verify.exe
and this file from same Script folder:
21-Jun-16 09:09 PM 0 python.exe
When I need to use pip I got errors.Then I try to fix with this:
pip install --upgrade ndg-httpsclient
and seem to be working now.
But I need to find from where come this file and why is this python file with:
C:\Python27\Scripts>python
Access is denied.
Maybe will be fix with a clean python instalation.
But the next step is and one of my concern is how to preserve this python instalation.
For example today the
pip update issue
come with many errors and this will be fixed.
Let's see how I fixed some of this.

First download Microsoft Visual C++ Compiler for Python 2.7.
This will fix this error:
error: Microsoft Visual C++ 9.0 is required. Get it from http://aka.ms/vcpython27
.

If you got this error: RuntimeError: Freetype library not found
C:\Python27>Scripts\pip install freetype-py
Collecting freetype-py
Downloading freetype-py-1.0.2.tar.gz (394kB)
100% |################################| 399kB 758kB/s
Building wheels for collected packages: freetype-py
Running setup.py bdist_wheel for freetype-py ... done
You can see also this freetype-py will not working:
C:\Python27>python.exe
Python 2.7.8 (default, Jun 30 2014, 16:08:48) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import freetype
Traceback (most recent call last):
File "", line 1, in
File "C:\Python27\lib\site-packages\freetype\__init__.py", line 21, in
from freetype.raw import *
File "C:\Python27\lib\site-packages\freetype\raw.py", line 37, in
raise RuntimeError('Freetype library not found')
RuntimeError: Freetype library not found
Also some python module has into cloud dizzy stuff. Why I told that.
For example the pycryptodome come with many features and working great.
Also some alternative is a bad solution.
It is hard to find a solution to the problem of leaving all these modules.
Any solutions?

The python module pycryptodome - part 001.

The tutorial for today come with this subject: python module pycryptodome.
According to the official website:
PyCryptodome is a self-contained Python package of low-level cryptographic primitives.
It supports Python 2.4 or newer, all Python 3 versions and PyPy.
official website.
Also this python module can be used with Windows and Linux (Ubuntu and Fedora distro linux).
I don't see anything about Mac OS - Apple OS Mac_OS - wikipedia.
First step of this tutorial:

C:\Python27\Scripts>pip install pycryptodome
Collecting pycryptodome
Downloading pycryptodome-3.4-cp27-cp27m-win_amd64.whl (7.5MB)
100% |################################| 7.5MB 88kB/s
Installing collected packages: pycryptodome
Successfully installed pycryptodome-3.4
You need to have command.com shell admin rights or you got errors:
C:\Python27\Scripts>python -m Crypto.SelfTest
Access is denied.
You can test it the instalation with:
C:\Python27>python -m Crypto.SelfTest
Skipping AESNI tests
...........................................................................................................................................................................................................................................................................................................................................................................

.......................
----------------------------------------------------------------------
Ran 22263 tests in 171.266s

OK
One simple test with this module:
C:\Python27>python.exe
Python 2.7.8 (default, Jun 30 2014, 16:08:48) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from Crypto.Cipher import AES
>>> from Crypto.Random import get_random_bytes
>>>
Most of resurces and features can be found here also can have some example at Matthew Green.
I will come with another tutorial about this python module.
Have a great day.

Thursday, August 11, 2016

Hide your info with stepic python module.

I will show a funny way to put your info into one image and then show this info.
First you need one image. I used this image:


First need to use Python 2.7 with Image ( Pillow python module) and stepic python module.
... and follow the below steps:

C:\Python27>cd Scripts
C:\Python27\Scripts>pip install Image
C:\Python27\Scripts>pip install stepic
C:\Python27\Scripts>cd ..

C:\Python27>python
Python 2.7.8 (default, Jun 30 2014, 16:08:48) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.

To encode and then to show the text from one image I used this python script:


import PIL
from PIL import Image
import stepic
im=Image.open("MonaLisa.jpg")
im1 = stepic.encode(im,'The smallest feline is a masterpiece.')
im1.save('test_encode.jpg','JPEG')
im.show()
im1.show()
decoding=stepic.decode(im1)
data_encode=decoding.decode()
print data_encode

The Python and antivirus Kaspersky antivirus.

The Kaspersky antivirus is very reserved versus python.
Even if the pip will try to install one module also any instance of numpy module has one replay over Kaspersky antivirus.
I try to start python shell and then import numpy after that I close the shell and I run it again. 
Update I try also help() / modules command under shell and more and randmon pyd file are blocked. This is strange because the pyd files are random.
See the result is how Kaspersky and python shell works together:
What do you think about that?


Wednesday, July 6, 2016

OpenCV with cutting video background.

This source code is a try to solve the video cutting background.
import cv2
from cv2 import *
import numpy as np
cap = cv2.VideoCapture("avi_test_001.avi")
while(True):
    ret, img = cap.read()
    mask = np.zeros(img.shape[:2],np.uint8)

    bgdModel = np.zeros((1,65),np.float64)
    fgdModel = np.zeros((1,65),np.float64)

    rect = (50,50,450,290)
    cv2.grabCut(img,mask,rect,bgdModel,fgdModel,5,cv2.GC_INIT_WITH_RECT)

    mask2 = np.where((mask==2)|(mask==0),0,1).astype('uint8')
    img = img*mask2[:,:,np.newaxis]
    cv2.imshow('frame',img)
    if 0xFF & cv2.waitKey(5) == 27:
        break
cap.release()
cv2.destroyAllWindows()

Saturday, June 25, 2016

OpenGL and OpenCV with python 2.7 - part 002.

I deal today with opencv and I fix some of my errors.
One is this error I got with cv2.VideoCapture. When I  try to used with load video and createBackgroundSubtractorMOG2() i got this:

cv2.error:   C:\builds\master_PackSlaveAddon-win64-vc12-static\opencv\modules\highgui\src\window.cpp:281:  error: (-215) size.width<0 amp="" cv::imshow="" function="" i="" in="" size.height="">
You need also to have opencv_ffmpeg310.dll and opencv_ffmpeg310_64.dll into your Windows C:\Windows\System32, this will help me to play videos.
Now make sure you have the opencv version 3.1.0 because opencv come with some changes over python.
C:\Python27\python
Python 2.7.8 (default, Jun 30 2014, 16:08:48) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>import cv2
>>>print cv2.__version__
3.1.0

You can take some infos from about opencv python module - cv2 with:

>>>cv2.getBuildInformation()
...
>>>cv2.getCPUTickCount()
...
>>>print cv2.getNumberOfCPUs()
...
>>>print cv2.ocl.haveOpenCL()
True

You can also see some error by disable OpenCL:

>>>cv2.ocl.setUseOpenCL(False)
>>>print cv2.ocl.useOpenCL()
False

Now will show you how to use webcam gray and color , and play one video:
webcam color

import numpy as np
import cv2
cap = cv2.VideoCapture(0)
while(True):
    ret, frame = cap.read()
    cv2.imshow('frame',frame)
    if 0xFF & cv2.waitKey(5) == 27:
        break
cap.release()
cv2.destroyAllWindows()

webcam gray

import numpy as np
import cv2
cap = cv2.VideoCapture(0)
while(True):
    ret, frame = cap.read()
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    cv2.imshow('frame',gray)
    if 0xFF & cv2.waitKey(5) == 27:
        break
cap.release()
cv2.destroyAllWindows()

play video

import cv2
from cv2 import *
capture = cv2.VideoCapture("avi_test_001.avi")
while True:
    ret, img = capture.read()
    cv2.imshow('some', img)
    if 0xFF & cv2.waitKey(5) == 27:
        break
cv2.destroyAllWindows()


Wednesday, June 22, 2016

OpenGL and OpenCV with python 2.7 - part 001.

First you need to know what version of python you use.
C:\Python27>python
Python 2.7.8 (default, Jun 30 2014, 16:08:48) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

You need also to download the OpenCV version 3.0 from here.
Then run the executable into your folder and get cv2.pyd file from \opencv\build\python\2.7\x64 and paste to \Python27\Lib\site-packages.
If you use then use 32 bit python version then use this path: \opencv\build\python\2.7\x86.
Use pip to install next python modules:
C:\Python27\Scripts>pip install PyOpenGL
...
C:\Python27\Scripts>pip install numpy
...
C:\Python27\Scripts>pip install matplotlib
...

Let's see how is working OpenGL:
C:\Python27>python
Python 2.7.8 (default, Jun 30 2014, 16:08:48) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import OpenGL
>>> import numpy
>>> import matplotlib
>>> import cv2
>>> from OpenGL import *
>>> from numpy import *
>>> from matplotlib import *
>>> from cv2 import *

You can also use dir(module) to see more. You can import all from GL, GLU and GLUT.
>>> dir(OpenGL)
['ALLOW_NUMPY_SCALARS', 'ARRAY_SIZE_CHECKING', 'CONTEXT_CHECKING', 'ERROR_CHECKING', 'ERROR_LOGGING', 'ERROR_ON_COPY', 'FORWARD_COMPATIBLE_ONLY', 'FULL_LOGGING', 'FormatHandler', 'MODULE_ANNOTATIONS', 'PlatformPlugin', 'SIZE_1_ARRAY_UNPACK', 'STORE_POINTERS', 'UNSIGNED_BYTE_IMAGES_AS_STRING', 'USE_ACCELERATE', 'WARN_ON_FORMAT_UNAVAILABLE', '__builtins__', '__doc__', '__file__', '__name__', '__package__', '__path__', '__version__', '_bi', 'environ_key', 'os', 'plugins', 'sys', 'version']
>>> from OpenGL.GL import *
>>> from OpenGL.GLU import *
>>> from OpenGL.GLUT import *
>>> from OpenGL.WGL import *

If you are very good with python OpenGL module then you can import just like this example:
>>> from OpenGL.arrays import ArrayDatatype
>>> from OpenGL.GL import (GL_ARRAY_BUFFER, GL_COLOR_BUFFER_BIT,
... GL_COMPILE_STATUS, GL_FALSE, GL_FLOAT, GL_FRAGMENT_SHADER,
... GL_LINK_STATUS, GL_RENDERER, GL_SHADING_LANGUAGE_VERSION,
... GL_STATIC_DRAW, GL_TRIANGLES, GL_TRUE, GL_VENDOR, GL_VERSION,
... GL_VERTEX_SHADER, glAttachShader, glBindBuffer, glBindVertexArray,
... glBufferData, glClear, glClearColor, glCompileShader,
... glCreateProgram, glCreateShader, glDeleteProgram,
... glDeleteShader, glDrawArrays, glEnableVertexAttribArray,
... glGenBuffers, glGenVertexArrays, glGetAttribLocation,
... glGetProgramInfoLog, glGetProgramiv, glGetShaderInfoLog,
... glGetShaderiv, glGetString, glGetUniformLocation, glLinkProgram,
... glShaderSource, glUseProgram, glVertexAttribPointer)

Most of this OpenGL need to have a valid OpenGL rendering context.
For example you can test it with WGL ( WGL or Wiggle is an API between OpenGL and the windowing system interface of Microsoft Windows):
>>> import OpenGL
>>> from OpenGL import *
>>> from OpenGL import WGL
>>> print WGL.wglGetCurrentDC()
None

Now , let's see the OpenCV python module with s=one simple webcam python script:
import numpy as np
import cv2
cap = cv2.VideoCapture(0)
while(True):
    ret, frame = cap.read()
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    cv2.imshow('frame',gray)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
cap.release()
cv2.destroyAllWindows()
This is result of my webcam:



Tuesday, June 21, 2016

Scrapy python module - part 001.

To install pip under python 2.7.8, securely download get-pip.py into Python27 folder.
Use this command:

C:\Python27\python.exe get-pip.py
...
C:\Python27\Scripts>pip2.7.exe install urllib3
C:\Python27\Scripts>pip2.7 install requests
C:\Python27\Scripts>pip install Scrapy

Some of python modules are installed:

Successfully built PyDispatcher pycparser
Installing collected packages: cssselect, queuelib, six, enum34, ipaddress, idna, pycparser, cffi, pyasn1, cryptography, pyOpenSSL, w3lib, lxml, parsel, PyDispatcher, zope.interface, Twisted, attrs, pyasn1-modules, service-identity, Scrapy
Successfully installed PyDispatcher-2.0.5 Scrapy-1.1.0 Twisted-16.2.0 attrs-16.0.0 cffi-1.7.0 cryptography-1.4 cssselect-0.9.2 enum34-1.1.6 idna-2.1 ipaddress-1.0.16 lxml-3.6.0 parsel-1.0.2 pyOpenSSL-16.0.0 pyasn1-0.1.9 pyasn1-modules-0.0.8 pycparser-2.14 queuelib-1.4.2 service-identity-16.0.0 six-1.10.0 w3lib-1.14.2 zope.interface-4.2.0



>>> print scrapy.version_info
(1, 1, 0)


>>> help(scrapy)
PACKAGE CONTENTS
_monkeypatches
cmdline
command
commands (package)
conf
contracts (package)
contrib (package)
contrib_exp (package)
core (package)
crawler
downloadermiddlewares (package)
dupefilter
dupefilters
exceptions
exporters
extension
extensions (package)
http (package)
interfaces
item
link
linkextractor
linkextractors (package)
loader (package)
log
logformatter
mail
middleware
pipelines (package)
project
resolver
responsetypes
selector (package)
settings (package)
shell
signalmanager
signals
spider
spiderloader
spidermanager
spidermiddlewares (package)
spiders (package)
squeue
squeues
stats
statscol
statscollectors
telnet
utils (package)
xlib (package)
...


C:\Python27\c:\Python27\Scripts\scrapy.exe startproject test_scrapy
New Scrapy project 'test_scrapy', using template directory 'c:\\python27\\lib\\site-packages\\scrapy\\templates\\project', created in:
C:\Python27\test_scrapy

You can start your first spider with:
cd test_scrapy
scrapy genspider example example.com

C:\Python27\cd test_scrapy

C:\Python27\test_scrapy>tree
Folder PATH listing
Volume serial number is 9A67-3A80
C:.
└───test_scrapy
└───spiders

Now you need to install win32api with this python module:
pip install pypiwin32
...
Downloading pypiwin32-219-cp27-none-win_amd64.whl (7.3MB)
100% |################################| 7.3MB 61kB/s
Installing collected packages: pypiwin32
Successfully installed pypiwin32-219

... and test scrapy bench:
C:\Python27\Scripts\scrapy.exe bench
2016-06-21 22:45:20 [scrapy] INFO: Scrapy 1.1.0 started (bot: scrapybot)
2016-06-21 22:45:20 [scrapy] INFO: Overridden settings: {'CLOSESPIDER_TIMEOUT': 10, 'LOG_LEVEL': 'INFO', 'LOGSTATS_INTERVAL': 1}
2016-06-21 22:45:39 [scrapy] INFO: Enabled extensions:
['scrapy.extensions.closespider.CloseSpider',
'scrapy.extensions.logstats.LogStats',
'scrapy.extensions.telnet.TelnetConsole',
'scrapy.extensions.corestats.CoreStats']
2016-06-21 22:45:46 [scrapy] INFO: Enabled downloader middlewares:
['scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',
'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',
'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',
'scrapy.downloadermiddlewares.retry.RetryMiddleware',
'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',
'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',
'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',
'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',
'scrapy.downloadermiddlewares.cookies.CookiesMiddleware',
'scrapy.downloadermiddlewares.chunked.ChunkedTransferMiddleware',
'scrapy.downloadermiddlewares.stats.DownloaderStats']
2016-06-21 22:45:46 [scrapy] INFO: Enabled spider middlewares:
['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware',
'scrapy.spidermiddlewares.offsite.OffsiteMiddleware',
'scrapy.spidermiddlewares.referer.RefererMiddleware',
'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware',
'scrapy.spidermiddlewares.depth.DepthMiddleware']
2016-06-21 22:45:46 [scrapy] INFO: Enabled item pipelines:
[]
2016-06-21 22:45:46 [scrapy] INFO: Spider opened
2016-06-21 22:45:46 [scrapy] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2016-06-21 22:45:48 [scrapy] INFO: Crawled 27 pages (at 1620 pages/min), scraped 0 items (at 0 items/min)
2016-06-21 22:45:49 [scrapy] INFO: Crawled 59 pages (at 1920 pages/min), scraped 0 items (at 0 items/min)
2016-06-21 22:45:50 [scrapy] INFO: Crawled 85 pages (at 1560 pages/min), scraped 0 items (at 0 items/min)
2016-06-21 22:45:51 [scrapy] INFO: Crawled 123 pages (at 2280 pages/min), scraped 0 items (at 0 items/min)
2016-06-21 22:45:52 [scrapy] INFO: Crawled 149 pages (at 1560 pages/min), scraped 0 items (at 0 items/min)
2016-06-21 22:45:53 [scrapy] INFO: Crawled 181 pages (at 1920 pages/min), scraped 0 items (at 0 items/min)
2016-06-21 22:45:54 [scrapy] INFO: Crawled 211 pages (at 1800 pages/min), scraped 0 items (at 0 items/min)
2016-06-21 22:45:55 [scrapy] INFO: Crawled 237 pages (at 1560 pages/min), scraped 0 items (at 0 items/min)
2016-06-21 22:45:56 [scrapy] INFO: Crawled 269 pages (at 1920 pages/min), scraped 0 items (at 0 items/min)
2016-06-21 22:45:57 [scrapy] INFO: Closing spider (closespider_timeout)
2016-06-21 22:45:57 [scrapy] INFO: Crawled 307 pages (at 2280 pages/min), scraped 0 items (at 0 items/min)
2016-06-21 22:45:57 [scrapy] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 97844,
'downloader/request_count': 317,
'downloader/request_method_count/GET': 317,
'downloader/response_bytes': 469955,
'downloader/response_count': 317,
'downloader/response_status_count/200': 317,
'dupefilter/filtered': 204,
'finish_reason': 'closespider_timeout',
'finish_time': datetime.datetime(2016, 6, 21, 19, 45, 57, 835000),
'log_count/INFO': 17,
'request_depth_max': 14,
'response_received_count': 317,
'scheduler/dequeued': 317,
'scheduler/dequeued/memory': 317,
'scheduler/enqueued': 6136,
'scheduler/enqueued/memory': 6136,
'start_time': datetime.datetime(2016, 6, 21, 19, 45, 46, 986000)}
2016-06-21 22:45:57 [scrapy] INFO: Spider closed (closespider_timeout)

Into the next tutorial I will try to use scrapy.
If you have some ideas about how to do the next step just send me one comment.


Thursday, May 19, 2016

News: The new python version 3.6.0.a1

I used the Windows x86-64 executable installer to install this version of python.
I set some settings and I start the install aplication.

I read all new changes and PEP 0498.
I take a look to see all python modules:
Please wait a moment while I gather a list of all available modules...

__future__          aifc                http                setuptools
_ast                antigravity         idlelib             shelve
_bisect             argparse            imaplib             shlex
_bootlocale         array               imghdr              shutil
_bz2                ast                 imp                 signal
_codecs             asynchat            importlib           site
_codecs_cn          asyncio             inspect             smtpd
_codecs_hk          asyncore            io                  smtplib
_codecs_iso2022     atexit              ipaddress           sndhdr
_codecs_jp          audioop             itertools           socket
_codecs_kr          base64              json                socketserver
_codecs_tw          bdb                 keyword             sqlite3
_collections        binascii            lib2to3             sre_compile
_collections_abc    binhex              linecache           sre_constants
_compat_pickle      bisect              locale              sre_parse
_compression        builtins            logging             ssl
_csv                bz2                 lzma                stat
_ctypes             cProfile            macpath             statistics
_ctypes_test        calendar            macurl2path         string
_datetime           cgi                 mailbox             stringprep
_decimal            cgitb               mailcap             struct
_dummy_thread       chunk               marshal             subprocess
_elementtree        cmath               math                sunau
_functools          cmd                 mimetypes           symbol
_hashlib            code                mmap                symtable
_heapq              codecs              modulefinder        sys
_imp                codeop              msilib              sysconfig
_io                 collections         msvcrt              tabnanny
_json               colorsys            multiprocessing     tarfile
_locale             compileall          netrc               telnetlib
_lsprof             concurrent          nntplib             tempfile
_lzma               configparser        nt                  test
_markupbase         contextlib          ntpath              textwrap
_md5                copy                nturl2path          this
_msi                copyreg             numbers             threading
_multibytecodec     crypt               opcode              time
_multiprocessing    csv                 operator            timeit
_opcode             ctypes              optparse            tkinter
_operator           curses              os                  token
_osx_support        datetime            parser              tokenize
_overlapped         dbm                 pathlib             trace
_pickle             decimal             pdb                 traceback
_pydecimal          difflib             pickle              tracemalloc
_pyio               dis                 pickletools         tty
_random             distutils           pip                 turtle
_sha1               doctest             pipes               turtledemo
_sha256             dummy_threading     pkg_resources       types
_sha512             easy_install        pkgutil             typing
_signal             email               platform            unicodedata
_sitebuiltins       encodings           plistlib            unittest
_socket             ensurepip           poplib              urllib
_sqlite3            enum                posixpath           uu
_sre                errno               pprint              uuid
_ssl                faulthandler        profile             venv
_stat               filecmp             pstats              warnings
_string             fileinput           pty                 wave
_strptime           fnmatch             py_compile          weakref
_struct             formatter           pyclbr              webbrowser
_symtable           fractions           pydoc               winreg
_testbuffer         ftplib              pydoc_data          winsound
_testcapi           functools           pyexpat             wsgiref
_testimportmultiple gc                  queue               xdrlib
_testmultiphase     genericpath         quopri              xml
_thread             getopt              random              xmlrpc
_threading_local    getpass             re                  xxsubtype
_tkinter            gettext             reprlib             zipapp
_tracemalloc        glob                rlcompleter         zipfile
_warnings           gzip                runpy               zipimport
_weakref            hashlib             sched               zlib
_weakrefset         heapq               secrets
_winapi             hmac                select
abc                 html                selectors
The new formatted string literals are a new kind of string literal, prefixed with 'f' this allow you to add contain replacement fields surrounded by curly braces.
I don't think the add Python start well, maybe need restart:
 >>> import crypt
Traceback (most recent call last):
  File "", line 1, in 
  File "C:\Python36\lib\crypt.py", line 3, in 
    import _crypt
ImportError: No module named '_crypt' 
Some of changes can be see at whatsnew.
You can read more and also download the new python released version 360a1 from here.
Very good work from development team, they make a great job.

Wednesday, April 20, 2016

News: New PyPy 5.1 released.

New features and bug fixes come with new PyPy 5.1 version.
The PyPy is a very compliant Python interpreter and supports x86 machines on most common operating systems.
Now we have full support for the IBM s390x and good optimizations.
Take a look here.

Saturday, March 19, 2016

Free ebook from O'Reilly - Functional Programming in Python.

You can download your free ebook from O'Reilly.
The Functional Programming in Python by David Mertz - publisher: O'Reilly - released: June 2015.
David Mertz is a director of the Python Software Foundation, and chair of its Trademarks and Outreach & Education Committees. He wrote the columns Charming Python and XML Matters for IBM developerWorks and the Addison-Wesley book Text Processing in Python. David has spoken at multiple OSCON and PyCon events.
This is the download link.

 

Thursday, February 4, 2016

Testing PyQt4 under Python 3.5.1.

Today I working well with python 3.5.1.
Most of my source code was wrote with python 2.7 and the next step was to using pip3.5 to update and upgrade some python modules.
I try to install PyQt4 with pip3.5 - not working.
So I used the old way: whl file from here.
That was good, most of the scripts was running.
The main problem was OpenGL and that will make errors when you try to use QtOpenGL.
The result of this seam to me the python 3.5.1 it's now without OpenGL features.

The most short source code into Python 3.5.1 .

Just type this :

import antigravity

That will open your browser with one comics from xkcd website.
The antigravity module was added to Python 3.5.1. I'm not sure but seam working also with python 2.7 version.

Saturday, January 23, 2016

wmi python module - part 002.

According to MSDN Microsoft the Win32_Process WMI class represents a process on an operating system.
We can see all of the inherited properties of processes:

class Win32_Process : CIM_Process
{
  string   Caption;
  string   CommandLine;
  string   CreationClassName;
  datetime CreationDate;
  string   CSCreationClassName;
  string   CSName;
  string   Description;
  string   ExecutablePath;
  uint16   ExecutionState;
  string   Handle;
  uint32   HandleCount;
  datetime InstallDate;
  uint64   KernelModeTime;
  uint32   MaximumWorkingSetSize;
  uint32   MinimumWorkingSetSize;
  string   Name;
  string   OSCreationClassName;
  string   OSName;
  uint64   OtherOperationCount;
  uint64   OtherTransferCount;
  uint32   PageFaults;
  uint32   PageFileUsage;
  uint32   ParentProcessId;
  uint32   PeakPageFileUsage;
  uint64   PeakVirtualSize;
  uint32   PeakWorkingSetSize;
  uint32   Priority = NULL;
  uint64   PrivatePageCount;
  uint32   ProcessId;
  uint32   QuotaNonPagedPoolUsage;
  uint32   QuotaPagedPoolUsage;
  uint32   QuotaPeakNonPagedPoolUsage;
  uint32   QuotaPeakPagedPoolUsage;
  uint64   ReadOperationCount;
  uint64   ReadTransferCount;
  uint32   SessionId;
  string   Status;
  datetime TerminationDate;
  uint32   ThreadCount;
  uint64   UserModeTime;
  uint64   VirtualSize;
  string   WindowsVersion;
  uint64   WorkingSetSize;
  uint64   WriteOperationCount;
  uint64   WriteTransferCount;
};
Let's make one simple example with wmi python module.
import wmi
c = wmi.WMI()
for process in c.Win32_Process ():
 name = process.Properties_("Name").Value
 pid = process.Properties_('ProcessID').Value
 parent = process.Properties_('ParentProcessId')
 termination = process.Properties_('TerminationDate')
 print (name,' = pid -',pid,'+', parent,'|termination_date-',termination)
And the output of this script it's :
firefox.exe  = pid - 13788 + 2564 |termination_date- None
explorer.exe  = pid - 1048 + 772 |termination_date- None
sublime_text.exe  = pid - 11404 + 2564 |termination_date- None
plugin_host.exe  = pid - 7432 + 11404 |termination_date- None
cmd.exe  = pid - 9568 + 2564 |termination_date- None
conhost.exe  = pid - 14124 + 9568 |termination_date- None
conhost.exe  = pid - 9700 + 11208 |termination_date- None
Taskmgr.exe  = pid - 9424 + 13404 |termination_date- None
WmiPrvSE.exe  = pid - 9764 + 772 |termination_date- None
SpfService64.exe  = pid - 11908 + 684 |termination_date- None
python.exe  = pid - 1308 + 9568 |termination_date- None

Friday, January 22, 2016

wmi python module - part 001.

Named WMI from Windows Management Instrumentation, this python module allow you to use Microsoft’s implementation of Web-Based Enterprise Management ( WBEM ).
Is a set of extensions to the Windows Driver Model AND that provides an operating system interface.
allows you to scripting languages like VBScript to manage Microsoft Windows personal computers and servers, both locally and remotely.
You cand read about this python module here.

C:\Python34\Scripts>pip install  wmi
...
Installing collected packages: wmi
Running setup.py install for wmi
warning: install_data: setup script did not provide a directory for 'readme.
txt' -- installing right in 'C:\Python34'
...
Successfully installed wmi
Cleaning up...

Let try first example :

C:\Python34>python
Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:45:13) [MSC v.1600 64 bit (AM
D64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import wmi
>>> remote_process = wmi.WMI (computer="home").new ("Win32_Process")
>>> for i in wmi.WMI ().Win32_OperatingSystem ():
...     print (i.Caption)
...
Microsoft Windows 10 Home

Now let's see another example can used by you with wmi python module.
This example let you see your processes.

import wmi
import datetime
c = wmi.WMI()
process_watcher = c.Win32_Process.watch_for("modification")
while True:
  new_process = process_watcher()
  print (new_process.Caption)

I used the python version 3.3.5 and Spyder ( Scientific PYthon Development EnviRonment ) to test the script.
You can change .watch_for method args with: creation, deletion, modification or operation.