PyOpenGL: Fix Attempt to call an undefined function glutInit .

This tutorial is about how to fix this error using Python version 3.6.4 :

OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInit,
check for bool(glutInit) before calling

First I start with a common pip3.6 install.

Scripts>pip3.6.exe install PyOpenGL
Collecting PyOpenGL
  Downloading https://files.pythonhosted.org/packages/9c/1d/4544708aaa89f26c97cc
09450bb333a23724a320923e74d73e028b3560f9/PyOpenGL-3.1.0.tar.gz (1.2MB)
    100% |████████████████████████████████| 1.2MB 1.2MB/s
Building wheels for collected packages: PyOpenGL
  Running setup.py bdist_wheel for PyOpenGL ... done
  Stored in directory: C:\Users\catafest\AppData\Local\pip\Cache\wheels\6c\00\7f
\1dd736f380848720ad79a1a1de5272e0d3f79c15a42968fb58
Successfully built PyOpenGL
Installing collected packages: PyOpenGL
Successfully installed PyOpenGL-3.1.0

When I run my python script code I got this error:

c:\Python364\Scripts>cd ..
c:\Python364>python.exe opengl_001.py
Traceback (most recent call last):
  File "opengl_001.py", line 182, in 
    StereoDepth().main()
  File "opengl_001.py", line 173, in main
    glutInit()
  File "c:\Python364\lib\site-packages\OpenGL\GLUT\special.py", line 333, in glu
tInit
    _base_glutInit( ctypes.byref(count), holder )
  File "c:\Python364\lib\site-packages\OpenGL\platform\baseplatform.py", line 40
7, in __call__
    self.__name__, self.__name__,
OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInit,
check for bool(glutInit) before calling

I use the whl files from here.

c:\Python364>cd Scripts

c:\Python364\Scripts>pip3.6.exe install PyOpenGL-3.1.2-cp36-cp36m-win_amd64.whl
Processing c:\python364\scripts\pyopengl-3.1.2-cp36-cp36m-win_amd64.whl
Installing collected packages: PyOpenGL
  Found existing installation: PyOpenGL 3.1.0
    Uninstalling PyOpenGL-3.1.0:
      Successfully uninstalled PyOpenGL-3.1.0
Successfully installed PyOpenGL-3.1.2

c:\Python364\Scripts>pip3.6.exe install PyOpenGL_accelerate-3.1.2-cp36-cp36m-win
_amd64.whl
Processing c:\python364\scripts\pyopengl_accelerate-3.1.2-cp36-cp36m-win_amd64.w
hl
Installing collected packages: PyOpenGL-accelerate
Successfully installed PyOpenGL-accelerate-3.1.2

This allow me to run well the python script with PyOpenGL python module.
This is result of shader stereo depth image:

Python 3.6.4 : Microsoft Azure - bad answer .

The Azure from Microsoft comes with the free account and $200 credit to explore services for 30 days.
I only have 7 days left from this free account.
During this time I tried to use it from scratch.
In this short tutorial, I will talk about this period,
First I used the python version 3.6.4 and the Azure development tools.
These are the links I follow:

• start with the free account
• read the example from azure
• my old post about azure and python

I install the azure for python with :

C:\Python364\Scripts>pip install azure

You can use a preview version of this package, which you can access using the --pre flag:

C:\Python364\Scripts>pip install --pre azure

I used the example from azure:

git clone https://github.com/Azure-Samples/storage-blobs-python-quickstart.git

Into azure account, I create a storage account named pythonazure.

You can configure the Access control (IAM) to use with your account.
This storage account needs to use keys, see Access keys area.
They tell us about this feature:
Use access keys to authenticate your applications when making requests to this Azure storage account. Store your access keys securely - for example, using Azure Key Vault - and don't share them. We recommend regenerating your access keys regularly. You are provided two access keys so that you can maintain connections using one key while regenerating the other.
I change the account name with pythonazure and account_key with my account key.
The result is this:

In view of my previous experiences with Google, Firebase and Azure on the ease of assimilation and understanding of the content and the time allocated to making a simple task according to the Azure documentation, then azure get the last place.
In azure services, we can see the errors that occur and which are non-existent on google or firebase.

I was interested in ease and fast access to python cloud services. However, you can read this point of view written by google here.

Python 3.6.4 : Trying to use the python azurure on the windows.

In this tutorial, I used the python version 3.6.4 and Windows 8.1 OS.
You can start with pip install tool for some azure modules:
Install the latest Batch runtime library

C:\Python364\Scripts>pip install azure-batch 

This will install the latest Storage management library

C:\Python364\Scripts>pip install azure-mgmt-scheduler 

Will install only the latest compute installed using the --pre flag:

C:\Python364\Scripts>pip install --pre azure-mgmt-compute 

Finally the storage I used into this tutorial:

C:\Python364\Scripts>pip install azure-storage --upgrade

You can install all of the azure python modules:

C:\Python364\Scripts>pip install --pre azure
...
Installing collected packages: azure-storage-nspkg, azure-storage-common, azure-
storage-queue, azure-servicebus, azure-servicefabric, azure-storage-file, azure-
servicemanagement-legacy, azure-mgmt-consumption, azure-mgmt-media, azure-mgmt-d
ns, azure-mgmt-search, azure-mgmt-cdn, azure-mgmt-compute, azure-mgmt-eventhub,
azure-mgmt-containerinstance, azure-mgmt-datalake-nspkg, azure-mgmt-datalake-ana
lytics, azure-mgmt-recoveryservices, azure-mgmt-authorization, azure-mgmt-adviso
r, azure-mgmt-recoveryservicesbackup, azure-mgmt-billing, azure-mgmt-devtestlabs
, azure-mgmt-network, azure-mgmt-web, azure-mgmt-applicationinsights, azure-mgmt
-cognitiveservices, azure-mgmt-rdbms, azure-mgmt-monitor, azure-mgmt-reservation
s, azure-mgmt-notificationhubs, azure-mgmt-loganalytics, azure-mgmt-logic, azure
-mgmt-iothubprovisioningservices, azure-mgmt-marketplaceordering, azure-mgmt-res
ource, azure-mgmt-scheduler, azure-mgmt-powerbiembedded, azure-mgmt-servicefabri
c, azure-mgmt-commerce, azure-mgmt-sql, azure-mgmt-cosmosdb, azure-mgmt-relay, a
zure-mgmt-storage, azure-mgmt-redis, azure-mgmt-managementpartner, azure-mgmt-tr
afficmanager, azure-mgmt-machinelearningcompute, azure-mgmt-datafactory, azure-m
gmt-hanaonazure, azure-mgmt-iothub, azure-mgmt-servermanager, azure-mgmt-batch,
azure-mgmt-keyvault, azure-mgmt-subscription, azure-mgmt-eventgrid, azure-mgmt-s
ervicebus, azure-mgmt-batchai, azure-mgmt-containerservice, azure-mgmt-container
registry, azure-mgmt-msi, azure-mgmt-datalake-store, azure-mgmt, azure-datalake-
store, azure-eventgrid, azure-keyvault, azure-cosmosdb-nspkg, futures, azure-cos
mosdb-table, azure-graphrbac, azure-storage-blob, azure

I tested with all azure python modules, but you can use just you need.
The next step is to open the Azure account - I have a trial free account.
I create a Resource Group named python-azure and a Storage account named pythonazure.
Into pythonazure I add the Files service and I upload an HTML file named default.html .
See the next images with the steps I make:
Let's make one simple test:

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 azure.common.credentials import UserPassCredentials
>>> from azure.mgmt.resource import ResourceManagementClient
>>> from azure.mgmt.storage import StorageManagementClient
>>> from azure.storage import CloudStorageAccount
>>> from azure.storage.blob.models import ContentSettings, PublicAccess
>>> 

I have not been able to authenticate myself with a python script in Azure.
I found some inconsistencies and issues on GitHub so I still have to document.

Any help in this regard is welcome.

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: