News : JAX in 100 Seconds by Fireship!

JAX is a Python library similar to NumPy for scientific computing and linear algebra, but designed to run on accelerators like Cuda-based GPUs and Google's TPUs.

News : New Django Builder online tool.

Django builder is free to use, and a personal project worked on in my spare time.

Any donations are very much appreciated.

If you want to, feel free to donate using the BitCoin address or PayPal link below.

Here is a new online tool that allows you to create projects with the Django framework and manage them more easily. It comes with different versions of Django, you can include channels and HTMX.

I don't see a command line to manage the project...

News : Website for Python users.

Here is a site called clcoding.com for those who use the python language with many simple examples and even a test fairy: python coding challenge day.

News : About my work and one of my websites.

I would like to bring to the attention of those who follow my activity on my websites and appreciate the inability to continue with one of the websites: free-tutorials.org. It is currently hosted on a free host, but I cannot import it 100%, which has led me not to complete it with new posts. The continuation of the activities there, considering the limited time, will be carried out on my blogs with the defined theme with which I started: Linux - Fedora, Graphics, Python, Pygame.

In the meantime, because the host is expensive and until now someone has helped me to host it on his server, it is possible to sell the domain: free-tutorials.org - I receive purchase offers at my personal Yahoo email address catafest@yahoo.com.

Minimum starting price 250 euros, because the domain is old from 2018.

News : OSINT - Open Source Intelligence python course.

For those who want to learn Python in order to: 

• become a really good developer; 
• to take the exam to get into university; 
• to be interviewed for a job.

This course omits VERY many important things and sometimes even recommends what could have been called bad practice. There are things that don't matter when writing small automations for everyday OSINT tasks, but are extremely important when creating serious team projects.

You cam see the project on this GhitHub account.

Python 3.6.9 : Anvil platform for web with python - part 001.

Anvil is a platform for building and hosting full-stack web apps written entirely in Python. Drag and drop your UI, then write Python on the front-end and back-end to make it all work ...

Yesterday I tested Anvil with python and was amazed at how simple it can be used to develop a web application. Anvil use python version 3.6.9. The tutorial I tested is available on the official website and is a feedback form that sends an email with your name, email address and content to your Anvil account address.

You can see this web application I follow from web tutorials on this webpage.

You can find some tutorials on this webpage.

How it works: Create a free account that can also be paid for via a web interface that you build with drag and drop and populate interface properties, add defined python modules and services, and write source code. I noticed that it uses beginner level python decorators and not very complex source code. The good part is that it is a fast development and the bad part is that it is limited to the free tier. After only three emails received, they came back with messages saying: ... his email quota has been exceeded.

These are features for anvil, I used in my project just the email:

Python 3.7.0 : CodeSkulptor online compiler and editor.

CodeSkulptor uses Skulpt to provide a browser-based coding environment and can be tested on the official website.

You can see an online default example with simplegui python package on that website with online editor.

Python : Starting learn with futurecoder online tool.

This website with online tool can be a good start for test and learn python language programming.

They come with this intro:

This is a 100% free and interactive course for people to teach themselves programming in Python, especially complete beginners at programming. It is carefully designed to reduce frustration and guide the user while still ensuring that they learn how to solve problems. The goal is for as many people as possible to learn programming.

You can try it out here: https://futurecoder.io .

Please consider contributing or donating!

Alternatively, come have a chat on slack.

You can see in the next video tutorial how this works:

Python : Open any Jupiter notebook from GitHub in Colab.

In this tutorial I will show you how to open any Jupiter notebook from GitHub in the Google online Colab area.
First, go to the jupyter notebook in GitHub project.
Example:
https://github.com/catafest/colab_google/blob/master/catafest_001.ipynb
Change the link by adding the world tocolab after github, see the following example:
https://githubtocolab.com/catafest/colab_google/blob/master/catafest_001.ipynb
This will open the google colab notebook with the content of Jupiter notebook.
For more information about using Google Colab with GitHub, see this notebook from the Google Colab research.

News : The Python 2.7 no longer support from Python team.

The 1st of January 2020 will mark the sunset of Python 2.7.
It’s clear that Python 3 is more popular these days.
You can learn more about the popularity of both on Google Trends.
Python 3.0 was released in December 2008.
The main goal was to fix problems existing in Python 2.
Since the 1st January 2020, Python 2 will no longer receive any support whatsoever from the core Python team.
Migrating to Python 3 is recommended, including some of the top libraries, such as machine learning.

Fix errors with the python errors encyclopedia.

Today I will present a website that I find very useful in learning and developing with the Python programming language.
This very short tutorial it is very useful for newcomers to get rid of all sorts of common questions about certain errors.
I encounter these types of errors when using stackoverflow account and can be a time consuming for most people who use it.
Try to read all about these errors on the python errors encyclopedia.

Python 3.6.4 : Test Django version 2.1.1 on Windows O.S.

I used the python version 3.6.4 to test the last Django framework version.
Add your python to the path environment variable under Windows O.S.
Create your working folder:

C:\Python364>mkdir mywebsite

Go to the folder to install all you need:

C:\Python364>cd mywebsite

Use a virtual environment using the virtualenv command:

C:\Python364\mywebsite>python -m venv myvenv
C:\Python364\mywebsite>myvenv\Scripts\activate
(myvenv) C:\Python364\mywebsite>python -m pip install --upgrade pip
(myvenv) C:\Python364\mywebsite>pip3.6 install django
Collecting django
...

If you try to run again this command you will see the version of Django:

(myvenv) C:\Python364\mywebsite>pip3.6 install django
Requirement already satisfied: django in c:\python364\mywebsite\myvenv\lib\
site-packages (2.1.1)
Requirement already satisfied: pytz in c:\python364\mywebsite\myvenv\lib\
site-packages (from django) (2018.5)

You need to run the django-admin command:

(myvenv) C:\Python364\mywebsite>cd myvenv
(myvenv) C:\Python364\mywebsite\myvenv>cd Scripts
(myvenv) C:\Python364\mywebsite\myvenv\Scripts>django-admin.exe startproject mysite
(myvenv) C:\Python364\mywebsite\myvenv\Scripts>dir my*
(myvenv) C:\Python364\mywebsite\myvenv\Scripts>cd mysite
(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite&

Make a change to settings file:

(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>cd mysite
(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite\mysite>notepad settings.py

Change UTC timezone:

TIME_ZONE = 'Europe/Paris'

Change host:

ALLOWED_HOSTS = ['192.168.0.185','mysite.com']

The next step is to use these commands:

(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite\mysite>cd ..
(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>python manage.py migrate
Operations to perform:
  Apply all migrations: admin, auth, contenttypes, sessions
Running migrations:
  Applying contenttypes.0001_initial... OK
  Applying auth.0001_initial... OK
  Applying admin.0001_initial... OK
  Applying admin.0002_logentry_remove_auto_add... OK
  Applying admin.0003_logentry_add_action_flag_choices... OK
  Applying contenttypes.0002_remove_content_type_name... OK
  Applying auth.0002_alter_permission_name_max_length... OK
  Applying auth.0003_alter_user_email_max_length... OK
  Applying auth.0004_alter_user_username_opts... OK
  Applying auth.0005_alter_user_last_login_null... OK
  Applying auth.0006_require_contenttypes_0002... OK
  Applying auth.0007_alter_validators_add_error_messages... OK
  Applying auth.0008_alter_user_username_max_length... OK
  Applying auth.0009_alter_user_last_name_max_length... OK
  Applying sessions.0001_initial... OK

Let's try these steps with the browser:

(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>python manage.py runserver
 192.168.0.185:8080
Performing system checks...

System check identified no issues (0 silenced).
September 07, 2018 - 16:30:13
Django version 2.1.1, using settings 'mysite.settings'
Starting development server at http://192.168.0.185:8080/
Quit the server with CTRL-BREAK.
[07/Sep/2018 16:30:16] "GET / HTTP/1.1" 200 16348
[07/Sep/2018 16:30:21] "GET / HTTP/1.1" 200 16348

This is the result:

Let's start Django application named myblog and add to settings.py :

(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>python manage.py startapp
myblog

(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>dir
(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>cd mysite
(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite\mysite>notepad settings.py

Search into settings.py this line and add 'myblog' and comma after, see:

# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'myblog',
]

Let's change models.py from myblog folder:

(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite\mysite>cd ..
(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>cd myblog
(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite\myblog>notepad models.py

Add this source code:

from django.db import models
# Create your models here.
from django.utils import timezone
from django.contrib.auth.models import User

class Post(models.Model):
 author = models.ForeignKey(User,on_delete=models.PROTECT)
 title = models.CharField(max_length=200)
 text = models.TextField()
 create_date = models.DateTimeField(default=timezone.now)
 published_date = models.DateTimeField(blank=True, null=True)
 
 def publish(self):
  self.publish_date = timezone.now()
  self.save()
 def __str__(self):
  return self.title

Go and run this command manage.py for model Post with makemigrations myblog and migrate myblog :

(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite\myblog>cd ..
(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>python manage.py 
makemigrations myblog
Migrations for 'myblog':
  myblog\migrations\0001_initial.py
    - Create model Post
(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>python manage.py migrate 
myblog
Operations to perform:
  Apply all migrations: myblog
Running migrations:
  Applying myblog.0001_initial... OK

Add this source code to admin.py from myblog folder:

(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>cd myblog
(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite\myblog>notepad admin.py

Let's test again:

(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite\myblog>cd ..
(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>python manage.py runserver
 192.168.0.185:8080
Performing system checks...

System check identified no issues (0 silenced).
September 07, 2018 - 17:19:00
Django version 2.1.1, using settings 'mysite.settings'
Starting development server at http://192.168.0.185:8080/
Quit the server with CTRL-BREAK.

Check the admin interface with add admin word to link, see: http://192.168.0.185:8080/admin

If you see some errors this will be fixed later.
Let's make a superuser with this command:

(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>python manage.py 
createsuperuser
Username (leave blank to use 'catafest'): catafest
Email address: catafest@yahoo.com
Password:
Password (again):
This password is too short. It must contain at least 8 characters.
Bypass password validation and create user anyway? [y/N]: y
Superuser created successfully.

Run again this command and log in with your user and password:

(myvenv) C:\Python364\mywebsite\myvenv\Scripts\mysite>python manage.py runserver
 192.168.0.185:8080

This is the result of users and posts.

Click on the Add button from Posts to add your post.
The result is this:

I don't make settings for URL and view.
This will be changed by users.

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

The trinket website for learning.

This website comes with this feature:
Trinket lets you run and write code in any browser, on any device.
Trinkets work instantly, with no need to log in, download plugins, or install software.
Easily share or embed the code with your changes when you're done.

• Just create Your Free Account then use the web interface to play with turtle python module:
• Trinket lets you run and write code in any browser, on any device.
• Trinkets work instantly, with no need to log in, download plugins, or install software.
• Easily share or embed the code with your changes when you're done.

Python tutor - web tool for python programming.

The website comes with this intro about this web tool.
Python Tutor, created by Philip Guo, helps people overcome a fundamental barrier to learning programming: understanding what happens as the computer runs each line of source code.
Using this tool, you can write Python, Java, JavaScript, TypeScript, Ruby, C, and C++ code in your web browser and visualize what the computer is doing step-by-step as it runs your code.
Over 3.5 million people in over 180 countries have used Python Tutor to visualize over 30 million pieces of code, often as a supplement to textbooks, lectures, and online tutorials.
I tested and worked very well.
You can use python programming language 2.7 and 3.6 versions.
No need to import python modules, you will get an error.
Just programming on the fly to test and see the result.
The website comes with some example to see how to deal with this tool.
Let's see some examples:

example with factorial :

# dumb recursive factorial
def fact(n):
    if (n <= 1):
        return 1
    else:
        return n * fact(n - 1)

print(fact(6))

example with for - else:

# find primes using a for-else construct
for n in range(2, 10):
    x_range = range(2, n)
    for x in x_range:
        if n % x == 0:
            break
    else:
        # loop fell through without finding a factor
        print(n)

example with inputs:

prefix = "Hello "

n1 = raw_input("Enter your name")

n2 = raw_input("Enter another name")

res = prefix + n1 + " and " + n2
print(res)

Run your script just press: Visualize Execution or Live Programming Mode buttons and the will run step by step with:
First, Back, Forward and Last.
One good feature of this tool - with a single line of JavaScript code, you can embed a Python Tutor visualization within any webpage.
Another good feature is COLLABORATE to learn together - this allow us to give and get direction with real-time python programming.
Can be a good tool for python chat users.
Let's show you a screenshot to see how this tool working with python scripting.