Fedora 42 : The cvxpy python module ... part 001.

We are building a CVXPY community on Discord. Join the conversation! CVXPY is an open source Python-embedded modeling language for convex optimization problems. It lets you express your problem in a natural way that follows the math, rather than in the restrictive standard form required by solvers.

Today I install the cvxpy python module ...

You can see on the official website - www.cvxpy.org .

NOTE: I don't understand why the blogger don't have a a code tag , I used a div - pre - code into txt file to wrote my posts ...

[mythcat@fedora ~]$ nano tutoriale.txt 

Let's see ...

[mythcat@fedora home]# dnf5 upgrade
[mythcat@fedora home]# dnf5 install openblas-devel
[mythcat@fedora home]# dnf5 install blas-devel
...
$ ldconfig -p | grep openblas
$ ldconfig -p | grep blas
...
[mythcat@fedora home]$ pip install cvxpy
...
Successfully built cvxpy ecos scs qdldl
Installing collected packages: scipy, scs, qdldl, ecos, clarabel, osqp, cvxpy
Successfully installed clarabel-0.9.0 cvxpy-1.5.2 ecos-2.0.14 osqp-0.6.7.post3 qdldl-0.1.7.post4 scipy-1.14.1 scs-3.2.7

Fedora 42 : Fedora game project with pygame and agentpy - part 004.

... working on hacking game code , you can test two version of the unfinished game with agentpy at my pagure Fedora account.

* Hack the code based on minimal information versus total information. The code has 5 distinct letters. - click on the letters on the keypad - the number of guessed letters is displayed in the form: centered - guessed letters on positions and moved guessed letters but on other positions NOTE: the source code is under development, I need to enter a scroll to be able to enter more codes with letters

Fedora 42 : Fedora game project with pygame and agentpy - part 003.

I have upgraded the source code with the following changes:

• added agent with logic using the python agentpy module;
• I increased the grid to 16 x 16;
• I kept the win condition at 8 pieces aligned in any direction;
• I added conditions for displaying the equality message;

The game is hard to win, you can try on my pagure account.

Fedora 42 : Fedora game project with pygame and agentpy - part 002.

... and update from 8 in 8 with SVG file type.

The source code I used or you can find it on the pagure project:

import pygame
from pygame.math import Vector2
import random
import os 
username = os.getlogin()
# Initialize Pygame
pygame.init()
# Set up the display
width, height = 800, 800
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("Eight-in-a-Row")
# Font setup
font = pygame.font.Font(None, 74)
# Colors
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
BLUE = (0, 0, 120)
# Game board dimensions
BOARD_WIDTH = 8
BOARD_HEIGHT = 8

class Player:
    def __init__(self, color, is_computer=False):
        self.color = color
        self.pieces = set()
        self.is_computer = is_computer
        self.svg_image = self.load_svg_image()

    def add_piece(self, x, y):
        self.pieces.add((x, y))

    # def draw_pieces(self):
    #     for x, y in self.pieces:
    #         pygame.draw.circle(screen, self.color, 
    #                            (x * width // BOARD_WIDTH + width // (2 * BOARD_WIDTH), 
    #                             y * height // BOARD_HEIGHT + height // (2 * BOARD_HEIGHT)), 
    #                            min(width, height) // (2 * BOARD_WIDTH) - 5)
    
    def load_svg_image(self):
        if self.color == BLUE:
            svg_path = "penguin-svgrepo-com.svg"
        elif self.color == WHITE:
            svg_path = "cube-svgrepo-com.svg"
        else:
            svg_path = "cube-svgrepo-com.svg"
        return pygame.image.load(svg_path)

    def draw_pieces(self):
        piece_size = min(width, height) // (BOARD_WIDTH) - 10
        for x, y in self.pieces:
            pos = Vector2(x * width // BOARD_WIDTH + width // (2 * BOARD_WIDTH),
                          y * height // BOARD_HEIGHT + height // (2 * BOARD_HEIGHT))
            scaled_image = pygame.transform.scale(self.svg_image, (piece_size, piece_size))
            image_rect = scaled_image.get_rect(center=pos)
            screen.blit(scaled_image, image_rect)

    def make_move(self, board):
        if self.is_computer:
            empty_squares = [(x, y) for x in range(BOARD_WIDTH) for y in range(BOARD_HEIGHT) 
                             if (x, y) not in board[0] and (x, y) not in board[1]]
            if empty_squares:
                return random.choice(empty_squares)
        return None

def check_winner(player):
    directions = [(0, 1), (1, 0), (1, 1), (1, -1)]
    for x, y in player.pieces:
        for dx, dy in directions:
            if all((x + i*dx, y + i*dy) in player.pieces for i in range(8)):
                return True
    return False
    
def display_winner(winner):
    text = font.render(f"Player {winner} wins!", True, [145,190,190])
    text_rect = text.get_rect(center=(width // 2, height // 2))
    screen.blit(text, text_rect)
    pygame.display.flip()
    pygame.time.wait(3000)  # Display the message for 3 seconds

# Create players
player1 = Player(BLUE)
player2 = Player(WHITE, is_computer=True)
# Game loop
running = True
turn = 0
game_over = False

while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.MOUSEBUTTONDOWN and not game_over:
            if turn % 2 == 0:  # Human player's turn
                mouse_x, mouse_y = event.pos
                column = mouse_x // (width // BOARD_WIDTH)
                row = mouse_y // (height // BOARD_HEIGHT)
                
                if (column, row) not in player1.pieces and (column, row) not in player2.pieces:
                    player1.add_piece(column, row)
                    
                    if check_winner(player1):
                        # print("Player 1 wins!")
                        display_winner(username)
                        game_over = True
                    
                    turn += 1

    if not game_over and turn % 2 == 1:  # Computer player's turn
        move = player2.make_move((player1.pieces, player2.pieces))
        if move:
            player2.add_piece(*move)
            
            if check_winner(player2):
                # print("Player 2 (Computer) wins!")
                display_winner("Computer")
                game_over = True
            turn += 1

    screen.fill(BLACK)
    
    # Draw game board
    for i in range(BOARD_WIDTH + 1):
        pygame.draw.line(screen, WHITE, (i * width // BOARD_WIDTH, 0), (i * width // BOARD_WIDTH, height), 2)
    for i in range(BOARD_HEIGHT + 1):
        pygame.draw.line(screen, WHITE, (0, i * height // BOARD_HEIGHT), (width, i * height // BOARD_HEIGHT), 2)

    # Draw pieces
    player1.draw_pieces()
    player2.draw_pieces()
    pygame.display.flip()

pygame.quit()

Fedora 42 : Fedora game project with pygame and agentpy - part 001.

I started a game project with the python packages pygame and agentpy in the Fedora 42 Linux distribution.

I used this version of Fedora:

[mythcat@fedora fedora_game]$ uname -a
Linux fedora 6.11.0-63.fc42.x86_64 #1 SMP PREEMPT_DYNAMIC Sun Sep 15 17:14:12 UTC 2024 x86_64 GNU/Linux

... and this python version:

Python 3.12.3 (main, Apr 17 2024, 00:00:00) [GCC 14.0.1 20240411 (Red Hat 14.0.1-0)] on linux

You can find it on my fedora pagure repo

Fedora 39 : Issues in Fedora with PyGobject and sway-tests.

Today I wanted to test this repo named sway-tests.

I followed the steps there and received an error from gi.repository.

This error is related to another issue related to PyGobject.

In Fedora Linux distro, installing PyGobject is done with pip like this:

$ pip install PyGobject

In order to have no errors, the dnf or dnf5 tool should be used like this ...

I tested the functionality of this installation with a simple example:

import gi

gi.require_version("Gtk", "3.0")
from gi.repository import Gtk

win = Gtk.Window()
win.connect("destroy", Gtk.main_quit)
win.show_all()
Gtk.main()

It worked very well.

After solving this issue, I returned to the initial one and tested the sway-tests.

$ whereis sway
$ env/bin/pytest --sway=/usr/bin/sway
$ sudo env/bin/pytest --sway=/usr/bin/sway

I used the command both with and without sudo.

Both generated the same errors.

For the following command I had to install ... xorg-x11-server-Xephyr:

Xephyr is an X server which has been implemented as an ordinary X application. It runs in a window just like other X applications, but it is an X server ...

... the fixed centered black window specific to the xorg runtime appeared and somewhere on the side the terminal showed me a bunch of errors.

... obviously, I don't know how well sway-tests is implemented, now it's an archived repo, but I solved the use of PyGobject in python on the Fedora linux distribution.

Fedora 36 : first steps with the Hy.

Hy is a dialect of the Lisp programming language designed to interact with Python by translating s-expressions into Python's abstract syntax tree (AST). Hy was introduced at Python Conference (PyCon) 2013 by Paul Tagliamonte.

This is quite similar to the old GIMP Script Fu that I've worked with in the past. The syntax assumes a join like tabs in HTML, only we'll use parentheses. I haven't studied in detail the implications it has with the python language, but it certainly wasn't invented for nothing.

First, you need to install it with the pip tool.

[mythcat@fedora ~]$ pip3 install hy --user
Collecting hy
...
Successfully built hy
Installing collected packages: funcparserlib, colorama, hy
Successfully installed colorama-0.4.5 funcparserlib-1.0.0 hy-0.24.0

The I test some examples:

[mythcat@fedora ~]$ hy
Hy 0.24.0 using CPython(main) 3.10.5 on Linux
=> (setv a 1)
=> "hello world"
"hello world"
=> (setv mylist [1 2 3])

=> (get mylist 0)
1
=> (defn greet [name]
...  "Hello "
...  (print "Hello " name))
=> (greet "mythcat")
Hello  mythcat

You can test it online with this online tool:

Fedora 35 : Python and Flask-Mailing on Fedora.

First of all, a Merry Christmas to the users and the Fedora team. Python version 3.10.1 works very well on Fedore 35 and today I tested a packet called: Flask_Mailing.

Flask-Mailing adds SMTP mail sending to your Flask applications., see the Github repo.

Let's start with the installation of this packet with the pip utility.

[mythcat@fedora ~]$ pip install -U flask-mailing
Defaulting to user installation because normal site-packages is not writeable
Collecting flask-mailing
  Downloading Flask_Mailing-0.0.5-py3-none-any.whl (15 kB)
...
Installing collected packages: rfc3986, anyio, typing-extensions, httpcore, dnspython, async-timeout, pydantic, httpx, 
email-validator, blinker, asgiref, aiosmtplib, aioredis, flask-mailing
    Running setup.py install for blinker ... done
Successfully installed aioredis-2.0.0 aiosmtplib-1.1.6 anyio-3.4.0 asgiref-3.4.1 async-timeout-4.0.2 blinker-1.4 dnspython-2.1.0
email-validator-1.1.3 flask-mailing-0.0.5 httpcore-0.14.3 httpx-0.21.1 pydantic-1.8.2 rfc3986-1.5.0 typing-extensions-4.0.1

I create a folder named ExempleFlask001:

[mythcat@fedora ~]$ mkdir ExempleFlask001
[mythcat@fedora ~]$ cd ExempleFlask001/
[mythcat@fedora ExempleFlask001]$ vi flask001.py

I created the simplest example to test through the import procedure and then read with the dir function, here is the source code:

from flask import Flask
from flask_mailing import Mail, Message

app = Flask(__name__)
@app.route("/")
def index():
    test = str(dir(Mail))
    return test
if __name__ == "__main__":
    app.run(debug=True)

The result of running the script on the command line:

[mythcat@fedora ExempleFlask001]$ python flask001.py
 * Serving Flask app 'flask001' (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 319-368-265
 ...

The browser's response to the script is this:

Fedora 35 : PyQt6 and Python 3.

I tested the new python version 10 and pyqt version 6 on the fedora version 35 distribution.

[mythcat@fedora ~]$ python
Python 3.10.0 (default, Oct  4 2021, 00:00:00) [GCC 11.2.1 20210728 (Red Hat 11.2.1-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
...
[mythcat@fedora ~]$ uname -a
Linux fedora 5.14.15-300.fc35.x86_64 #1 SMP Wed Oct 27 15:53:39 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

I install PyQt6 easy with pip tool:

[mythcat@fedora ~]$ pip install PyQt6 --user
Collecting PyQt6
  Downloading PyQt6-6.2.1-cp36-abi3-manylinux1_x86_64.whl (7.7 MB)
  ...
  Downloading PyQt6_Qt6-6.2.1-py3-none-manylinux_2_28_x86_64.whl (50.0 MB)
  ...
  Downloading PyQt6_sip-13.1.0-cp310-cp310-manylinux1_x86_64.whl (309 kB)
Installing collected packages: PyQt6-sip, PyQt6-Qt6, PyQt6
Successfully installed PyQt6-6.2.1 PyQt6-Qt6-6.2.1 PyQt6-sip-13.1.0

I tested with this python source code and it works fine.

import sys
from PyQt6.QtWidgets import QApplication, QWidget

def main():

    app = QApplication(sys.argv)

    w = QWidget()
    w.resize(250, 200)
    w.move(300, 300)

    w.setWindowTitle('Simple')
    w.show()

    sys.exit(app.exec())

if __name__ == '__main__':
    main()

Fedora 34 : Can be better? part 019.

Another way to improve the Fedora 34 is to add the lastes PyQt6 python package into repo.

[root@desk mythcat]# dnf search PyQt6
Last metadata expiration check: 2:03:10 ago on Tue 06 Jul 2021 08:52:41 PM EEST.
No matches found. 

First stable release for PyQt6 was on Jan 2021 by Riverbank Computing Ltd. under GPL or commercial and can be used with Python 3.

Let's install with pip tool:

[mythcat@desk ~]$ /usr/bin/python3 -m pip install --upgrade pip
...
  WARNING: The scripts pip, pip3 and pip3.9 are installed in '/home/mythcat/.local/bin' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, 
  use --no-warn-script-location.
Successfully installed pip-21.1.3
[mythcat@desk ~]$ pip install PyQt6 --user
...

Let's see a simple example with this python package:

import sys
from PyQt6.QtCore import Qt
from PyQt6.QtWidgets import QApplication, QLabel

def main():
    app = QApplication(sys.argv)
    win = QLabel()
    win.resize(640, 498)
    win.setText("Qt is awesome!!!")
    win.show()
    app.exec()

if __name__ == "__main__":
    main()

I tested and run well.

Fedora 33 : First steps with manim.

Manim is an engine for precise programmatic animations, designed for creating explanatory math videos like 3Blue1Brown. 

The documentation can be found on this webpage. 

First, install with the DNF tool all packages:

[root@desk manim_Projects]# dnf install cairo-devel pango-devel ffmpeg python3-devel 
texlive-scheme-medium texlive-standalone.noarch texlive-collection-latexextra.noarch

Last metadata expiration check: 2:19:22 ago on Tue 13 Apr 2021 08:20:03 PM EEST.
Package cairo-devel-1.16.0-9.fc33.x86_64 is already installed.
Package pango-devel-1.48.4-1.fc33.x86_64 is already installed.
Package ffmpeg-4.3.2-2.fc33.x86_64 is already installed.
Package python3-devel-3.9.2-1.fc33.x86_64 is already installed.
Package texlive-scheme-medium-9:svn54074-35.fc33.noarch is already installed.
Package texlive-standalone-9:svn47136-35.fc33.noarch is already installed.
Package texlive-collection-latexextra-9:svn54851-35.fc33.noarch is already installed.
Dependencies resolved.
Nothing to do.
Complete!

Use pip tool to install manim and manimlib.

[mythcat@desk manim_Projects]$ pip install manim
...
[mythcat@desk manim_Projects]$ pip install manimlib
...

You can use --user option argument. A default example from the doc area can be a good test.

from manim import * 

config.background_color = DARK_GRAY
class MovingFrame(Scene):
     def construct(self):
        # Write equations
        equation = MathTex("2x^2-5x+2", "=", "(x-2)(2x-1)")

        # Create animation
        self.play(Write(equation))

        # Add moving frames
        framebox1 = SurroundingRectangle(equation[0], buff=.1)
        framebox2 = SurroundingRectangle(equation[2], buff=.1)

        # Create animations
        self.play(Create(framebox1))  # creating the frame

        self.wait()
        # replace frame 1 with frame 2
        self.play(ReplacementTransform(framebox1, framebox2))
    
        self.wait()

I run it well:

[mythcat@desk manim_Projects]$ /home/mythcat/.local/bin/manim -pl -ql -i follow_me_textxt.py 

This is the result:

Fedora 33 : Install PyGame 2.0 on Fedora.

Today I will show you how to install the python PyGame version 2.0 package with python version 3.9 in Fedora 33 distro. Let's install all Fedora packages need for this python package:

[root@desk pygame]# dnf install SDL2-devel.x86_64 
...
Installed:
  SDL2-devel-2.0.12-4.fc33.x86_64                                               

Complete!
[root@desk pygame]# dnf install SDL2_ttf-devel.x86_64
...
Installed:
  SDL2_ttf-2.0.15-6.fc33.x86_64       SDL2_ttf-devel-2.0.15-6.fc33.x86_64      

Complete!
[root@desk pygame]# dnf install SDL2_image-devel.x86_64
...
Installed:
  SDL2_image-2.0.5-5.fc33.x86_64      SDL2_image-devel-2.0.5-5.fc33.x86_64     

Complete!
[root@desk pygame]# dnf install SDL2_mixer-devel.x86_64 
...
Installed:
  SDL2_mixer-2.0.4-7.fc33.x86_64      SDL2_mixer-devel-2.0.4-7.fc33.x86_64     

Complete!
[root@desk pygame]# dnf install SDL2_gfx-devel.x86_64 
...
Installed:
  SDL2_gfx-1.0.4-3.fc33.x86_64        SDL2_gfx-devel-1.0.4-3.fc33.x86_64       

Complete!
[root@desk pygame]# dnf install portmidi-devel.x86_64 
...
Installed:
  portmidi-devel-217-38.fc33.x86_64                                             

Complete!

Use this command to clone it from GitHub and install it:

[mythcat@desk ~]$ git clone https://github.com/pygame/pygame
Cloning into 'pygame'...
remote: Enumerating objects: 4, done.
remote: Counting objects: 100% (4/4), done.
remote: Compressing objects: 100% (4/4), done.
remote: Total 38509 (delta 0), reused 0 (delta 0), pack-reused 38505
Receiving objects: 100% (38509/38509), 17.78 MiB | 11.66 MiB/s, done.
Resolving deltas: 100% (29718/29718), done.
[mythcat@desk ~]$ cd pygame/
[mythcat@desk pygame]$ python3.9 setup.py install --user


WARNING, No "Setup" File Exists, Running "buildconfig/config.py"
Using UNIX configuration...


Hunting dependencies...
SDL     : found 2.0.12
FONT    : found
IMAGE   : found
MIXER   : found
PNG     : found
JPEG    : found
SCRAP   : found
PORTMIDI: found
PORTTIME: found
FREETYPE: found 23.4.17

If you get compiler errors during install, double-check
the compiler flags in the "Setup" file.
...
copying docs/pygame_tiny.gif -> build/bdist.linux-x86_64/egg/pygame/docs
creating build/bdist.linux-x86_64/egg/EGG-INFO
copying pygame.egg-info/PKG-INFO -> build/bdist.linux-x86_64/egg/EGG-INFO
copying pygame.egg-info/SOURCES.txt -> build/bdist.linux-x86_64/egg/EGG-INFO
copying pygame.egg-info/dependency_links.txt -> build/bdist.linux-x86_64/egg/EGG-INFO
copying pygame.egg-info/entry_points.txt -> build/bdist.linux-x86_64/egg/EGG-INFO
copying pygame.egg-info/not-zip-safe -> build/bdist.linux-x86_64/egg/EGG-INFO
copying pygame.egg-info/top_level.txt -> build/bdist.linux-x86_64/egg/EGG-INFO
writing build/bdist.linux-x86_64/egg/EGG-INFO/native_libs.txt
creating dist
creating 'dist/pygame-2.0.1.dev1-py3.9-linux-x86_64.egg' and adding 'build/bdist.linux-x86_64/egg' to it
removing 'build/bdist.linux-x86_64/egg' (and everything under it)
Processing pygame-2.0.1.dev1-py3.9-linux-x86_64.egg
creating /home/mythcat/.local/lib/python3.9/site-packages/pygame-2.0.1.dev1-py3.9-linux-x86_64.egg
Extracting pygame-2.0.1.dev1-py3.9-linux-x86_64.egg to /home/mythcat/.local/lib/python3.9/site-packages
Adding pygame 2.0.1.dev1 to easy-install.pth file

Installed /home/mythcat/.local/lib/python3.9/site-packages/pygame-2.0.1.dev1-py3.9-linux-x86_64.egg
Processing dependencies for pygame==2.0.1.dev1
Finished processing dependencies for pygame==2.0.1.dev1

Let's test it:

[mythcat@desk pygame]$ ls
build	     dist  examples	    README.rst	setup.cfg  src_c   test
buildconfig  docs  pygame.egg-info  Setup	setup.py   src_py
[mythcat@desk pygame]$ python3.9
Python 3.9.0 (default, Oct  6 2020, 00:00:00) 
[GCC 10.2.1 20200826 (Red Hat 10.2.1-3)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pygame
pygame 2.0.1.dev1 (SDL 2.0.12, python 3.9.0)
Hello from the pygame community. https://www.pygame.org/contribute.html
>>> 

Fedora 32 : Can be better? part 008.

The Fedora development is not very active in the last programming language.
The main reason is the build new packages and put on the repository.
I think this can be improved with a good tool to solve all dependencies and link all into a good package.
Today I tested the new Python version 3.5.10 released on September 5th, 2020.
I download an unzip the archive and I use these commands to build this python version

[mythcat@desk ~]$ cd Python-3.5.10/
[mythcat@desk Python-3.5.10]$ ./configure
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking for python3.5... no
checking for python3... python3
checking for --enable-universalsdk... no
...

The next command is make:

[mythcat@desk Python-3.5.10]$ make
gcc -pthread -c -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes
   -Werror=declaration-after-statement   -I. -I./Include    -DPy_BUILD_CORE -o Programs/python.o 
./Programs/python.c
...
# On Darwin, always use the python version of the script, the shell
# version doesn't use the compiler customizations that are provided
# in python (_osx_support.py).
if test `uname -s` = Darwin; then \
 cp python-config.py python-config; \
fi

Then I used make test.

[mythcat@desk Python-3.5.10]$ make test
running build
running build_ext
INFO: Can't locate Tcl/Tk libs and/or headers

Python build finished successfully!
...

For the last part I used this command:

[mythcat@desk Python-3.5.10]$ sudo make install
...

The result of this is ...

[mythcat@desk Python-3.5.10]$ ls
aclocal.m4     config.sub    Include          Mac              Modules  platform        python            README
build          configure     install-sh       Makefile         Objects  Programs        Python            setup.py
config.guess   configure.ac  Lib              Makefile.pre     Parser   pybuilddir.txt  python-config     Tools
config.log     Doc           libpython3.5m.a  Makefile.pre.in  PC       pyconfig.h      python-config.py
config.status  Grammar       LICENSE          Misc             PCbuild  pyconfig.h.in   python-gdb.py
[mythcat@desk Python-3.5.10]$ ./python 
Python 3.5.10 (default, Sep  6 2020, 22:32:07) 
[GCC 10.2.1 20200723 (Red Hat 10.2.1-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
...

Fedora 30 : Introduction to Qt Designer.

Qt Designer is the Qt tool for designing and building graphical user interfaces (GUIs) with Qt Widgets... see the Qt Designer manual webpage.

[root@desk mythcat]# dnf install qt5-designer.x86_64
...
Installed:
  qt5-designer-5.12.5-1.fc30.x86_64                                             
  qt5-qttools-libs-designercomponents-5.12.5-1.fc30.x86_64                      

Complete!

Let's start this tool with this command:

[mythcat@desk ~]$ designer-qt5 

Follow this video tutorial from my youtube channel:

You can preview your work with Ctrl+R keys.
After you finish with the project then save the file with this name: mytest.ui.
The next command to create your working python file named mytest.py.
Use this command with the -x option creates the main section to the my.py file that will allow us to test quickly whether the GUI looks as we intended.

[mythcat@desk ~]$ pyuic5 -x  mytest.ui -o mytest.py

Now you can run it to see the output:

[mythcat@desk ~]$ python3  mytest.py

Fedora 30 : News about python 3.8.0 and install on Linux.

The new release of python development comes today.
You can see on the official webpage the new versions of Python 3.7.5 Oct. 15, 2019 and Python 3.8.0 Oct. 14, 2019.
I wrote about how to install version 3.8.0 on Fedora 30.
See the full tutorial here.

Fedora 30 : A general intro to linux signals with python.

UNIX/Linux systems offer special mechanisms to communicate between each individual process with signals. Let's see these signals:

[mythcat@desk ~]$ kill -l
 1) SIGHUP  2) SIGINT  3) SIGQUIT  4) SIGILL  5) SIGTRAP
 6) SIGABRT  7) SIGBUS  8) SIGFPE  9) SIGKILL 10) SIGUSR1
11) SIGSEGV 12) SIGUSR2 13) SIGPIPE 14) SIGALRM 15) SIGTERM
16) SIGSTKFLT 17) SIGCHLD 18) SIGCONT 19) SIGSTOP 20) SIGTSTP
21) SIGTTIN 22) SIGTTOU 23) SIGURG 24) SIGXCPU 25) SIGXFSZ
26) SIGVTALRM 27) SIGPROF 28) SIGWINCH 29) SIGIO 30) SIGPWR
31) SIGSYS 34) SIGRTMIN 35) SIGRTMIN+1 36) SIGRTMIN+2 37) SIGRTMIN+3
38) SIGRTMIN+4 39) SIGRTMIN+5 40) SIGRTMIN+6 41) SIGRTMIN+7 42) SIGRTMIN+8
43) SIGRTMIN+9 44) SIGRTMIN+10 45) SIGRTMIN+11 46) SIGRTMIN+12 47) SIGRTMIN+13
48) SIGRTMIN+14 49) SIGRTMIN+15 50) SIGRTMAX-14 51) SIGRTMAX-13 52) SIGRTMAX-12
53) SIGRTMAX-11 54) SIGRTMAX-10 55) SIGRTMAX-9 56) SIGRTMAX-8 57) SIGRTMAX-7
58) SIGRTMAX-6 59) SIGRTMAX-5 60) SIGRTMAX-4 61) SIGRTMAX-3 62) SIGRTMAX-2
63) SIGRTMAX-1 64) SIGRTMAX

Each signal is represented by an integer value, and the list of signals that are available. This simple python script create a process and print one message. Each process named PID comes with a number.

[mythcat@desk ~]$ cat python3 signal_001.py 
cat: python3: No such file or directory
import os
import sys
import time
print('PID number is:', os.getpid())
while True:
    print('Waiting...')
    time.sleep(6)

[mythcat@desk ~]$ python3 signal_001.py 
PID number is: 2566
Waiting...
Waiting...
Waiting...
Waiting...
Waiting...
Hangup

The PID process can be kill with this command:

[mythcat@desk ~]$ kill -SIGTERM 2566

Let's see another example that receives the signal we have sent to the process.

import os
import signal
import time

def receiveSignal(signalNumber, frame):
    print('Received:', signalNumber)
    raise SystemExit('Exiting')
    return

if __name__ == '__main__':
    # register the signals to be caught
    signal.signal(signal.SIGHUP, receiveSignal)
    signal.signal(signal.SIGINT, receiveSignal)
    signal.signal(signal.SIGQUIT, receiveSignal)
    signal.signal(signal.SIGILL, receiveSignal)
    signal.signal(signal.SIGTRAP, receiveSignal)
    signal.signal(signal.SIGABRT, receiveSignal)
    signal.signal(signal.SIGBUS, receiveSignal)
    signal.signal(signal.SIGFPE, receiveSignal)
    #signal.signal(signal.SIGKILL, receiveSignal)
    signal.signal(signal.SIGUSR1, receiveSignal)
    signal.signal(signal.SIGSEGV, receiveSignal)
    signal.signal(signal.SIGUSR2, receiveSignal)
    signal.signal(signal.SIGPIPE, receiveSignal)
    signal.signal(signal.SIGALRM, receiveSignal)
    signal.signal(signal.SIGTERM, receiveSignal)
    # register the signal to be caught
    signal.signal(signal.SIGUSR1, receiveSignal)

    # register the signal to be ignored
    signal.signal(signal.SIGINT, signal.SIG_IGN)

    # output current process id
    print('My PID is:', os.getpid())

    signal.pause()

Let't run it and see what happend when send a signal to the PID:

[mythcat@desk ~]$ python3 py_pid.py
My PID is: 2698
Received: 10
Exiting

You can see the kill command will send this output: Received: 10 Exiting .

[mythcat@desk ~]$ kill -SIGUSR1 2698

Fedora 30 : Using the python-wikitcms.

This python module named python-wikitcms can be used for interacting with the Fedora wiki.
The Fedora wiki used Fedora's Wikitcms.
Today I test it and works great with Fedora distro version 30.
First, the install of the fedora package with DNF tool:

[root@desk mythcat]# dnf install python3-wikitcms.noarch
...
Downloading Packages:
(1/8): python3-mwclient-0.9.3-3.fc30.noarch.rpm 186 kB/s |  61 kB     00:00    
(2/8): python3-fedfind-4.2.5-1.fc30.noarch.rpm  314 kB/s | 105 kB     00:00    
(3/8): python3-cached_property-1.5.1-3.fc30.noa  41 kB/s |  20 kB     00:00    
(4/8): python3-requests-oauthlib-1.0.0-1.fc29.n 313 kB/s |  40 kB     00:00    
(5/8): python3-jwt-1.7.1-2.fc30.noarch.rpm      112 kB/s |  42 kB     00:00    
(6/8): python3-oauthlib-2.1.0-1.fc29.noarch.rpm 293 kB/s | 153 kB     00:00    
(7/8): python3-simplejson-3.16.0-2.fc30.x86_64. 641 kB/s | 278 kB     00:00    
(8/8): python3-wikitcms-2.4.2-2.fc30.noarch.rpm 264 kB/s |  84 kB     00:00

I used this simple example to get information about the Fedora wiki:

[mythcat@desk ~]$ python3
Python 3.7.3 (default, May 11 2019, 00:38:04) 
[GCC 9.1.1 20190503 (Red Hat 9.1.1-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from wikitcms.wiki import Wiki
>>> my_site = Wiki()
>>> event = my_site.current_event
>>> print(event.version)
31 Rawhide 20190704.n.1
>>> page = my_site.get_validation_page('Installation','23','Final','RC10')
>>> for row in page.get_resultrows():
...     print(row.testcase)
... 
QA:Testcase_Mediakit_Checksums
QA:Testcase_Mediakit_ISO_Size
QA:Testcase_Mediakit_Repoclosure
QA:Testcase_Mediakit_FileConflicts
QA:Testcase_Boot_default_install
...
>>> dir(my_site)

I used this source code to login with my account.

>>> my_site.login()

A webpage is open to get access to the account and show this info:
The OpenID Connect client Wiki Test Control Management System is asking to authorize access for mythcat. this allow you to access it 
After I agree with this the page tells me to close it:
You can close this window and return to the CLI
The next examples show you how to get and show information from the wiki:

>>> print(my_site.username)
Mythcat
>>> result = my_site.api('query', titles='Mythcat')
>>> for page in result['query']['pages'].values():
...             print(page['title'])
... 
Mythcat
>>> for my_contributions in my_site.usercontributions('Mythcat'):
...     print(my_contributions)
...

This python module comes with low documentation.

Fedora 30 : The Pythonic tool.

The tutorial for today is about Pythonic tool.
Named Pythonic is a graphical programming tool that makes it easy for users to create Python applications using ready-made function modules.
This tool providing the consistent features and characteristics of a trading bot with just a few clicks.
The Pythonic tool is currently available in four languages: English, German, Spanish, and Chinese. 
The tool comes with basic functions such as a scheduler, if-branches, connectivity, and logging functions are available out of the box and can be parameterized using a corresponding GUI.
Each graphical element is functionally processed individually.
The base idea is: A unique graphical input mask to carry out the parameterization necessary for processing, then after a process completes successfully, the returned result can be transferred to a subsequent process for further use.
You can use server processes can be placed in parallel in the background as listener applications that wait for external events and initiate the creation of a process when the event arrives.
Pythonic's data type list makes it easy to utilize different access techniques (push, pop, insert, append).
The install of this tool is easy on Fedora 30 distro:

[mythcat@desk ~]$ python3.7 -m pip install Pythonic --user
Collecting Pythonic
...
Successfully installed PyQt5-5.8.2 Pythonic-0.12 pandas-0.24.2 pythonic-binance-0.7.2

This is a screenshot with this tool.

Fedora 29 : Thonny editor for python.

This Python IDE for beginners named Thonny is a simple editor with Python 3.7 built in.
The official webpage can be found here and the GitHub project page is this.
The development team is from the University of Tartu, Estonia with the help from the open-source community. Thonny grew up in University of Tartu (https://www.ut.ee), Institute of Computer Science (https://www.cs.ut.ee).
I test it today with Fedora 29 and works well.
Let's start with the first step:

[mythcat@desk ~]$ pip3 install thonny --user
Collecting thonny
...
Successfully installed astroid-2.2.5 asttokens-1.1.13 docutils-0.14 isort-4.3.17 jedi-0.13.3 lazy-object-proxy-1.3.1 
mccabe-0.6.1 mypy-0.700 mypy-extensions-0.4.1 parso-0.4.0 pylint-2.3.1 pyperclip-1.7.0 pyserial-3.4 thonny-3.1.2 
typed-ast-1.3.1
...
[root@desk mythcat]# dnf install python3-tkinter.x86_64
Last metadata expiration check: 0:21:20 ago on Tue 09 Apr 2019 09:57:24 PM EEST.

Installed:
  python3-tkinter-3.7.2-5.fc29.x86_64          tk-1:8.6.8-1.fc29.x86_64         

Complete!

This editor can be found on Fedora repo, but I used the last released version software.

[root@desk mythcat]# dnf search thonny
Last metadata expiration check: 0:36:55 ago on Tue 09 Apr 2019 09:57:24 PM EEST.
========================= Name Exactly Matched: thonny =========================
thonny.noarch : Python IDE for beginners

Fedora 29 : Testing the dnf python module.

Today we tested with Fedora 29 a python module called DNF.
All users have used this tool.
This python module is not very documented on the internet.
A more complex example can be found on DNF tool documentation.
I tried to see what I can get from this module.
Let's start installing it with the pip tool:

$ pip install dnf --user

Here are some tests that I managed to run in the python shell.

[mythcat@desk ~]$ python
Python 2.7.15 (default, Oct 15 2018, 15:26:09) 
[GCC 8.2.1 20180801 (Red Hat 8.2.1-2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> import dnf
>>> dir(dnf)
['Base', 'Plugin', 'VERSION', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 
'__path__', '__version__', 'base', 'callback', 'cli', 'comps', 'conf', 'const', 'crypto', 'db', 
'dnf', 'dnssec', 'drpm', 'exceptions', 'goal', 'history', 'i18n', 'lock', 'logging', 'match_counter',
 'module', 'package', 'persistor', 'plugin', 'pycomp', 'query', 'repo', 'repodict', 'rpm', 'sack',
 'selector', 'subject', 'transaction', 'unicode_literals', 'util', 'warnings', 'yum']
>>> import dnf.conf
>>> print(dnf.conf.Conf())
[main]
assumeno: 0
assumeyes: 0
autocheck_running_kernel: 1
bandwidth: 0
best: 0
...
>>> import dnf.module
>>> import dnf.rpm
>>> import dnf.cli
>>> base = dnf.Base()
>>> base.update_cache()
True

This read all repositories:

>>> base.read_all_repos()

You need to read the sack for querying:

>>> base.fill_sack()

>>> base.sack_activation = True

Create a query to matches all packages in sack:

>>> qr=base.sack.query() 

Get only available packages:

>>> qa=qr.available() 

Get only installed packages:

>>> qi=qr.installed()
>>> q_a=qa.run()
>>> for pkg in qi.run():
...     if pkg not in q_a:
...             print('%s.%s' % (pkg.name, pkg.arch))
... 
NetworkManager-openvpn.x86_64
NetworkManager-openvpn-gnome.x86_64
coolkey.x86_64
glibc-debuginfo.x86_64
glibc-debuginfo-common.x86_64
kernel.x86_64
kernel.x86_64
kernel-core.x86_64
kernel-core.x86_64

Get all packages installed on Linux:

>>> q_i=qi.run()
>>> for pkg in qi.run():
...     print('%s.%s' % (pkg.name, pkg.arch))

You can see more about the Python programming language on my blog.