Python 3.6.4 : Using python client with blogger API .

I used a new project into console cloud google.
I used the google-api-python-client from here with OAuth service.
You need to create a project and add the blogger API to use it.
For credentials, I used OAuth with the JSON file from google.
This is the source code:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from __future__ import print_function

__author__ = 'Catalin George Festila ( catafest , mythcat )'

import sys

from oauth2client import client
from googleapiclient import sample_tools


def main(argv):
  # Authenticate and construct service.
  service, flags = sample_tools.init(
      argv, 'blogger', 'v3', __doc__, __file__,
      scope='https://www.googleapis.com/auth/blogger')

  try:

      users = service.users()

      # Retrieve this user's profile information
      thisuser = users.get(userId='self').execute()
      print('This user\'s display name is: %s' % thisuser['displayName'])

      blogs = service.blogs()

      # Retrieve the list of Blogs this user has write privileges on
      thisusersblogs = blogs.listByUser(userId='self').execute()
      for blog in thisusersblogs['items']:
        print('The blog named \'%s\' is at: %s' % (blog['name'], blog['url']))

      posts = service.posts()

      # List the posts for each blog this user has
      for blog in thisusersblogs['items']:
        print('The posts for %s:' % blog['name'])
        request = posts.list(blogId=blog['id'])
        while request != None:
          posts_doc = request.execute()
          if 'items' in posts_doc and not (posts_doc['items'] is None):
            for post in posts_doc['items']:
              print('  %s (%s)' % (post['title'], post['url']))
          request = posts.list_next(request, posts_doc)

  except client.AccessTokenRefreshError:
    print ('The credentials have been revoked or expired, please re-run'
      'the application to re-authorize')

if __name__ == '__main__':
  main(sys.argv)

The content of the folder project named google_api_python.

c:\Python364\google_api_python>dir
06/24/2018  08:27 PM             1,096 blogger.dat
06/24/2018  07:49 PM             2,599 blogger.py
06/24/2018  08:24 PM               309 client_secrets.json
06/24/2018  08:26 PM                76 debug.log
               4 File(s)          4,080 bytes
               2 Dir(s)  201,382,006,784 bytes free

You need to add the client_id and client_secret from google project into file client_secrets.json.
Run the python script:

c:\Python364\google_api_python>python.exe blogger.py

The google will ask you about the authentification and will run the script:

Google show us all the infos about this project into dashboard:

Python 3.6.4 : The qrcode python module .

This python module named qrcode is a suite of tools to Generate QR codes.
Let's start the tutorial with the install steep :

c:\Python364\Scripts>pip install qrcode[pil]
Collecting qrcode[pil]
... 
Successfully installed qrcode-6.0 

Let's see the output for dir:

>>> import qrcode
>>> from qrcode import *
>>> dir(qrcode)
['ERROR_CORRECT_H', 'ERROR_CORRECT_L', 'ERROR_CORRECT_M', 'ERROR_CORRECT_Q', 'LU
T', 'QRCode', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__',
 '__name__', '__package__', '__path__', '__spec__', 'base', 'constants', 'except
ions', 'image', 'main', 'make', 'run_example', 'util']
>>> dir(qrcode.util)
['ALPHA_NUM', 'BCH_digit', 'BCH_type_info', 'BCH_type_number', 'BIT_LIMIT_TABLE'
, 'BitBuffer', 'G15', 'G15_MASK', 'G18', 'LUT', 'MODE_8BIT_BYTE', 'MODE_ALPHA_NU
M', 'MODE_KANJI', 'MODE_NUMBER', 'MODE_SIZE_LARGE', 'MODE_SIZE_MEDIUM', 'MODE_SI
ZE_SMALL', 'NUMBER_LENGTH', 'PAD0', 'PAD1', 'PATTERN_POSITION_TABLE', 'QRData',
'RE_ALPHA_NUM', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__
', '__name__', '__package__', '__spec__', '_data_count', '_lost_point_level1', '
_lost_point_level2', '_lost_point_level3', '_lost_point_level4', '_optimal_split
', 'base', 'create_bytes', 'create_data', 'exceptions', 'length_in_bits', 'lost_
point', 'mask_func', 'math', 'mode_sizes_for_version', 'optimal_data_chunks', 'o
ptimal_mode', 'pattern_position', 're', 'six', 'to_bytestring', 'xrange']
>>> dir(qrcode.image)
['__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__',
'__package__', '__path__', '__spec__', 'base']
>>> dir(qrcode.run_example)
['__annotations__', '__call__', '__class__', '__closure__', '__code__', '__defau
lts__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__',
 '__ge__', '__get__', '__getattribute__', '__globals__', '__gt__', '__hash__', '
__init__', '__init_subclass__', '__kwdefaults__', '__le__', '__lt__', '__module_
_', '__name__', '__ne__', '__new__', '__qualname__', '__reduce__', '__reduce_ex_
_', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__']
>>> 

This is the test python script I used to test this python module:

import qrcode
from  qrcode import *
qr = qrcode.QRCode(
    version=1,
    error_correction=qrcode.constants.ERROR_CORRECT_L,
    box_size=10,
    border=4,
)
qr.add_data('https://python-catalin.blogspot.com/')
qr.make(fit=True)

img = qr.make_image(fill_color="black", back_color="white")
with open('my_qr_test.png', 'wb') as qrfile:
    img.save(qrfile)

This is the output of QR file:

Blender 3D and Roblox with Python .

I spend my free time with my son playing Roblox and in the meantime, I try to introduce him to the world of computers.
However, you can download the player as a 3D object and use it as an avatar.
Here's an issue: The 3D object is hard to set with origins for animation but python and Blender 3D can easily solve this.
You can use BMesh.
As you know:
BMesh is the new Blender mesh system in 2.63, with full support for N-sided polygons instead of only triangles and quads.
The result of this download 3D object has a bad origin:

Let's see the source code:

import bpy
import bmesh
import mathutils 
from mathutils import Vector

context = bpy.context

def origin_to_bottom(obj):
    matrix_world = obj.matrix_world
    local_verts = [Vector(v[:]) for v in obj.bound_box]
    blender_mesh = blender_meshesh.new()
    blender_mesh.from_mesh(obj.data)
    x, y, z = 0, 0, 0
    l = len(local_verts)
    z = min([v.z for v in local_verts])
    local_origin = Vector((0, 0, 0))
    global_origin = matrix_world * local_origin
    for v in blender_mesh.verts:
        v.coord = v.coord - local_origin
    blender_mesh.to_mesh(obj.data)
    matrix_world.translation = global_origin

mesh_objs = [mesh_object for mesh_object in context.selected_objects if mesh_object.type == 'MESH']
bpy.ops.object.origin_set(type='ORIGIN_GEOMETRY')

for my_objects in mesh_objs:
    origin_to_bottom(my_objects)

The result is this:

Python 3.6.4 : Testing OpenCV default Hough Line Transform.

This tutorial is about Hough Line Transform and OpenCV python module.
This can be a good example for Hough Line Transform.
See the source code:

import cv2
import numpy as np
img = cv2.imread('test_lines.jpg')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

# filter black and gray pixels
thresh = cv2.threshold(gray, 100, 255, cv2.THRESH_BINARY_INV)[1]

# find lines
lines = cv2.HoughLinesP(thresh, 1, np.pi/180,360,18)

# output lines onto image
for line in lines:
    x1,y1,x2,y2 = line[0]
    cv2.line(img,(x1,y1),(x2,y2),(255,255,0),2)

# show image
cv2.imshow('threshold houghlines', img)
cv2.waitKey(0)
cv2.destroyAllWindows()

This is the result for test_lines.jpg .

You can test by make changes into this line of code:

lines = cv2.HoughLinesP(thresh, 1, np.pi/180,360,18)

According to documentation, the changes are influenced by the range parameters.

Python 3.6.4 : Testing the wit python module .

Today I tested the wit python module.
This python module is a Python library for Wit.ai
You can use for this issues:

• Bots
• Mobile apps
• Home automation
• Wearable devices
• Robots

These support languages like:
Afrikaans, Albanian, Arabic, Azerbaijani, Bengali, Bosnian, Bulgarian, Burmese, Catalan, Central Khmer, Chinese, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, Georgian, German, Greek, Hausa, Hebrew, Hindi, Hungarian, Icelandic, Igbo, Indonesian, Inuktitut, Italian, Japanese, Kannada, Kinyarwanda, Korean, Latin, Latvian, Lithuanian, Macedonian, Malay, Maori, Mongolian, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Somali, Southern Ndebele, Southern Sotho, Spanish, Swahili, Swati, Swedish, Tagalog, Tamil, Thai, Tsonga, Tswana, Turkish, Ukrainian, Urdu, Uzbek, Venda, Vietnamese, Xhosa, Yoruba and Zulu.
About Wit is free, including for commercial use. So both private and public Wit apps are free and are governed our terms.
For this tutorial I use python 3.6.4, see :

C:\Python364>python.exe
Python 3.6.4 (v3.6.4:d48eceb, Dec 19 2017, 06:54:40) [MSC v.1900 64 bit (AMD64)]on win32
Type "help", "copyright", "credits" or "license" for more information.

The install of wit python module is simple:

C:\Python364>cd Scripts

C:\Python364\Scripts>pip install wit
Collecting wit
...
Successfully built wit
Installing collected packages: wit
Successfully installed wit-5.1.0

C:\Python364\Scripts>python
Python 3.6.4 (v3.6.4:d48eceb, Dec 19 2017, 06:54:40) [MSC v.1900 64 bit (AMD64)]
 on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from wit import Wit
>>> w=Wit('3ODKKNB---------')
>>> w.message('Python este un limbaj de programare')
{'_text': 'Python este un limbaj de programare', 'entities': {}, 'msg_id': '0pNT
QXn87P3MYvqmR'}
>>> dir(w)
['__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__form
at__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_s
ubclass__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__reduce__',
 '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclas
shook__', '__weakref__', '_sessions', 'access_token', 'interactive', 'logger', '
message', 'speech']
>>> file = open('C:\Python364\hello_world.wav', 'rb')
>>> w.speech(file)
Traceback (most recent call last):
  File "", line 1, in 
  File "C:\Python364\lib\site-packages\wit\wit.py", line 88, in speech
    data=audio_file, headers=headers)
  File "C:\Python364\lib\site-packages\wit\wit.py", line 41, in req
    ' (' + rsp.reason + ')')
wit.wit.WitError: Wit responded with status: 400 (Bad Request)

The error has an open issue.
It does not seem to work properly.
There are some open issues for this python module.
The examples on the internet are not very concise with how to use this python module.

Python Qt5 : menu example.

This simple tutorial is about PyQt5 and menu window example.
I have a similar example with Qt4 on this blog.
The main reason for this tutorial comes from the idea of simplicity and reuse the source code from PyQt4 and PyQt5.
I do not know if there are significant changes to the Qt5 base IU. However, it is good to check on the official pages. Let's look at the example with comments specific to source code lines:

# -*- coding: utf-8 -*-
"""
Created on Thu Apr 26 17:20:02 2018

@author: catafest
"""
import sys
from PyQt5.QtWidgets import QMainWindow, QAction, qApp, QApplication, QDesktopWidget
from PyQt5.QtGui import QIcon

class Example(QMainWindow):
    #init the example class to draw the window application    
    def __init__(self):
        super().__init__()    
        self.initUI()
    #create the def center to select the center of the screen         
    def center(self):
        # geometry of the main window
        qr = self.frameGeometry()
        # center point of screen
        cp = QDesktopWidget().availableGeometry().center()
        # move rectangle's center point to screen's center point
        qr.moveCenter(cp)
        # top left of rectangle becomes top left of window centering it
        self.move(qr.topLeft())
    #create the init UI to draw the application
    def initUI(self):               
        #create the action for the exit application with shortcut and icon
        #you can add new action for File menu and any actions you need
        exitAct = QAction(QIcon('exit.png'), '&Exit', self)        
        exitAct.setShortcut('Ctrl+Q')
        exitAct.setStatusTip('Exit application')
        exitAct.triggered.connect(qApp.quit)
        #create the status bar for menu 
        self.statusBar()
        #create the menu with the text File , add the exit action 
        #you can add many items on menu with actions for each item
        menubar = self.menuBar()
        fileMenu = menubar.addMenu('&File')
        fileMenu.addAction(exitAct)
        #resize the window application 
        self.resize(640, 480)
        #draw on center of the screen 
        self.center()
        #add title on windows application 
        self.setWindowTitle('Simple menu')
        #show the application
        self.show()
        #close the UI class
        
if __name__ == '__main__':
    #create the application 
    app = QApplication(sys.argv)
    #use the UI with new  class
    ex = Example()
    #run the UI 
    sys.exit(app.exec_())

The result of this code is this:

The jdoodle online tool for python 3.

This online tool from jdoodle website lets you to programming online with python 3 version.
To see all python modules used by this editor just add this python script and use Execute button.

import sys
import os 
print(help('modules'))

Python 3.6.4 : Testing PyQt5 with Spyder I.D.E.

Today I tested the PyQt5 python module with python version 3.6.4.
The script was created and tested with Spyder I.D.E. version 3.2.8.
The PyQt5 version is:

from PyQt5.Qt import PYQT_VERSION_STR
print("PyQt version:", PYQT_VERSION_STR)
PyQt version: 5.9.2

This is the python script:

import sys
from PyQt5.QtWidgets import (QWidget, QCalendarWidget,
    QLabel, QApplication)
from PyQt5.QtCore import QDate
 
class Calendar(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()
 
    def initUI(self):
        calendar = QCalendarWidget(self)
        calendar.setGridVisible(True)
        calendar.move(0, 15)
        calendar.clicked[QDate].connect(self.showDate)
        calendar.currentPageChanged[int, int].connect(self.currentPageChanged)
 
        self.lbl = QLabel(self)
        date = calendar.selectedDate()
        self.lbl.setText(date.toString())
        self.lbl.move(0, 0)
 
        self.setGeometry(300, 300, 300, 300)
        self.setWindowTitle('Calendar')
        self.show()
 
    def showDate(self, date):
        self.lbl.setText(date.toString())
 
    def currentPageChanged(self, year, month):
        print(year, month)
 
if __name__ == '__main__':
    app = QApplication(sys.argv)
    calendar_test = Calendar()
    sys.exit(app.exec_())

The result of this script is:

The Google Cloud SDK - part 003 .

The webapp2 is a lightweight Python web framework compatible with Google App Engine’s.
The webapp2 project, by Rodrigo Moraes, started as a fork of the App Engine web app framework.
The webapp2 includes a number of features such as improved support for URI routing, session management and localization.
You can see google documentation about this python module this link.
They say:
"webapp2 is compatible with the WSGI standard for Python web applications. You don't have to use webapp2 to write Python applications for App Engine. Other web application frameworks, such as Django, work with App Engine, and App Engine supports any Python code that uses the CGI standard. "
This is default start python example from Google Cloud SDK tested in the last tutorial.

import webapp2

class MainPage(webapp2.RequestHandler):
    def get(self):
        self.response.headers['Content-Type'] = 'text/plain'
        self.response.write('Hello, World!')

app = webapp2.WSGIApplication([
    ('/', MainPage),
], debug=True)

Remember how to deploy your project to google:

C:\Python27>cd python-docs-samples\appengine\standard\hello_world

C:\Python27\python-docs-samples\appengine\standard\hello_world>gcloud app deploy app.yaml
Services to deploy:

descriptor:      [C:\Python27\python-docs-samples\appengine\standard\hello_world\app.yaml]
source:          [C:\Python27\python-docs-samples\appengine\standard\hello_world]
target project:  [xxxxxx]
target service:  [default]
target version:  [xxxxxxxxxxxxx]
target url:      [https://xxxxxx.appspot.com]


Do you want to continue (Y/n)?  y

Beginning deployment of service [default]...

Now I make some changes into main.py file to show you how easy is to use it.
This file: main.py is set into setting file app.yaml like the script: main.app.
Let's make some changes.

The default project is set with --promote true the result is: after a number of uploads you got this error:

ERROR: (gcloud.app.deploy) Error Response: [400] Your app may not have more than 15 versions.

Please delete one of the existing versions before trying to create a new version.
...

To fix go to App Engine - Versions with selected versions and press Delete button.
Then you can make the upload with the command :

gcloud app deploy app.yaml

Also, you can use this:

gcloud app deploy app.yaml --stop-previous-version

Some info about your project can be seen with this command:

gcloud config list

You can see the gcloud versions with:

gcloud version

I tested also with python version 3.6.4 :

C:\Python364\Scripts>pip install webapp2
Requirement already satisfied: webapp2 in c:\python364\lib\site-packages
      2 python-dateutil-2.7.0 setuptools-39.0.0 

The regex online tool for python and any programming languages.

Today I tested this online tool.
Is a tool for a regular expression (regex or regexp for short) for many programming languages.
These programming languages are php, javascript, golang and python.
The tool is easy to use it.
First, you need to select the programming language that is used for regular expression.
The next step is to put the regular expression into the edit box and add your text to be parsed by this regular expression.
For example, if you use this inputs for a regular expression:
([a-zA-Z]+) \d+
and this text example:
March 7 1976, June 1, August 9, Dec 25
the result output will be this:
March , June , August , Dec

Python 3.6.4 : Testing OpenCV default GrabCut algorithm.

The main goal for me was to test the new install of python 3.6.4 and python modules with Windows operating system version 8.1.
For this tutorial, I chose these python modules: cv2, numpy and matplotlib .
I have tested the GrabCut algorithm article from here.
The article comes with a python script that includes the modules I tested in this programming language.
They tell us:
User inputs the rectangle. Everything outside this rectangle will be taken as sure background (That is the reason it is mentioned before that your rectangle should include all the objects). Everything inside rectangle is unknown. Similarly any user input specifying foreground and background are considered as hard-labelling which means they won't change in the process.
From my point of view, it is not a very successful algorithm to crop off the background but is working well.

import numpy as np
import cv2
from matplotlib import pyplot as plt

img = cv2.imread('test_python_opencv.jpg')
mask = np.zeros(img.shape[:2],np.uint8)

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

rect = (57,58,476,741)
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]

plt.imshow(img),plt.colorbar(),plt.show()

The intersection areas are eliminated exactly as in the documentation.
See my first test on an image taken from the internet.

News: The Spyder IDE - new release .

Many python users use the Spyder IDE.
This IDE comes with many features and is easy to use, see Wikipedia page:
Spyder (formerly Pydee[3]) is an open-source cross-platform integrated development environment (IDE) for scientific programming in the Python language. Spyder integrates NumPy, SciPy, Matplotlib and IPython, as well as other open source software.[4][5] It is released under the MIT license.[6]
Six days ago, a release of this IDE with version 3.2.7 was announced.
This IDE can be download from GitHub page.

Use IMDB website with IMDbPY python module .

This python package is written in pure Python 3 to access the IMDb's database and used it.

You can read about this python module from GitHub docs webpage
The development team comes with this DISCLAIMER:
# DISCLAIMER

IMDbPY and the authors are not affiliated with Internet Movie Database Inc.

IMDb is a trademark of Internet Movie Database Inc. and all contents
and data included on the IMDb's site is the property of IMDb or its
content suppliers and protected by United States and international
copyright laws.

Please, read the IMDb's conditions of use in their website:
- http://www.imdb.com/conditions
- http://www.imdb.com/licensing
- any other notice in the http://www.imdb.com/ site.
First I start the install process with the pip tool:

C:\Python364\Scripts>pip install IMDbPY
Requirement already satisfied: IMDbPY in c:\python364\lib\site-packages
Requirement already satisfied: lxml in c:\python364\lib\site-packages (from IMDbPY)
Requirement already satisfied: sqlalchemy-migrate in c:\python364\lib\site-packages (from IMDbPY)
Requirement already satisfied: SQLAlchemy in c:\python364\lib\site-packages (from IMDbPY)
Requirement already satisfied: pbr>=1.8 in c:\python364\lib\site-packages (from sqlalchemy-migrate->IMDbPY)
Requirement already satisfied: decorator in c:\python364\lib\site-packages (from sqlalchemy-migrate->IMDbPY)
Requirement already satisfied: six>=1.7.0 in c:\python364\lib\site-packages (from sqlalchemy-migrate->IMDbPY)
Requirement already satisfied: sqlparse in c:\python364\lib\site-packages (from sqlalchemy-migrate->IMDbPY)
Requirement already satisfied: Tempita>=0.4 in c:\python364\lib\site-packages (from sqlalchemy-migrate->IMDbPY)

This is my source code to test it and working well.

# start with IMDb python class
from imdb import IMDb
imd = IMDb('http')
print("-===-")
# search movies by title
# and show the long imdb canonical title and movieID of the results.
title = imd.search_movie("Under the Dome")
for item in title:
   print(item['long imdb canonical title'], item.movieID)
print("-===-")
# search for a person
for person in imd.search_person("Ana de Armas"):
    print(person.personID, person['name'])
print("-===-")
# get 5 movies tagged with a keyword
movies_keyword = imd.get_keyword('novel', results=5)
for item in movies_keyword:
   print(item['long imdb canonical title'], item.movieID)
print("-===-")
# get top 250  from top movies
top250 = imd.get_top250_movies()
for item in top250:
   print(item['long imdb canonical title'], item.movieID)
print("-===-")
print("top 250 -=> ")
# get bottom 100 from top movies
bottom100 = imd.get_bottom100_movies()
print("bottom 100 -=> ")
for item in top250:
   print(item['long imdb canonical title'], item.movieID)