Saturday, February 1, 2025
Wednesday, January 15, 2025
Fedora 41 : evtest basic tool for linux devices.
The evtest is c - Input device event monitor and query tool.
root@fedora:/home/mythcat# dnf5 install evtest
Updating and loading repositories:
Repositories loaded.
Package Arch Version Repository Size
Installing:
evtest x86_64 1.35-8.fc41 fedora 63.0 KiB
Transaction Summary:
Installing: 1 package
Total size of inbound packages is 30 KiB. Need to download 30 KiB.
After this operation, 63 KiB extra will be used (install 63 KiB, remove 0 B).
...
root@fedora:/home/mythcat# evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0: Sleep Button
/dev/input/event1: Lid Switch
/dev/input/event10: HDA Intel Line
/dev/input/event11: HDA Intel Headphone
/dev/input/event12: PixArt USB Optical Mouse
/dev/input/event2: Power Button
/dev/input/event3: AT Translated Set 2 keyboard
/dev/input/event4: SynPS/2 Synaptics TouchPad
/dev/input/event5: Video Bus
/dev/input/event6: ST LIS3LV02DL Accelerometer
/dev/input/event7: Quickstart Button 1
/dev/input/event8: HP WMI hotkeys
/dev/input/event9: HDA Intel Mic
Select the device event number [0-12]:Sunday, January 5, 2025
Fedora 41 : the pref tool under Fedora.
Today I tested the perf tool in Fedora 41 and it is a bit difficult to use. I documented myself and found some information on the web and in the online linux community. Here is what I thought was worth remembering and what I tested.
The pref tool can't run anyway:
mythcat@fedora:~/PythonProjects$ perf record -e cache-misses,page-faults,minor-faults,major-faults,cpu-migrations,L1-dcache-load-misses,L1-dcache-store-misses,L1-icache-load-misses,LLC-load-misses,LLC-store-misses,dTLB-load-misses,dTLB-store-misses,iTLB-load-misses
Error:
Access to performance monitoring and observability operations is limited.
Enforced MAC policy settings (SELinux) can limit access to performance
monitoring and observability operations. Inspect system audit records for
more perf_event access control information and adjusting the policy.
Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open
access to performance monitoring and observability operations for processes
without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability.
More information can be found at 'Perf events and tool security' document:
https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html
perf_event_paranoid setting is 2:
-1: Allow use of (almost) all events by all users
Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK
>= 0: Disallow raw and ftrace function tracepoint access
>= 1: Disallow CPU event access
>= 2: Disallow kernel profiling
To make the adjusted perf_event_paranoid setting permanent preserve ...I used with sudo , wait and Ctrl + C to stop:
mythcat@fedora:~/PythonProjects$ sudo perf record -e cache-misses,page-faults,minor-faults,major-faults,cpu-migrations,L1-dcache-load-misses,L1-dcache-store-misses,L1-icache-load-misses,LLC-load-misses,LLC-store-misses,dTLB-load-misses,dTLB-store-misses,iTLB-load-misses ...To get the accurate number of events count then number of results:
mythcat@fedora:~/PythonProjects$ perf report -D -i perf.data | grep RECORD_SAMPLE | wc -l
22461I get my pref data and I saw all my system data with:
mythcat@fedora:~/PythonProjects$ sudo perf report -f -i perf.data 
Friday, January 3, 2025
Fedora 41 : NVim from sources or packages !
Today I tried the nvim and saw this big issue:
root@fedora:/home/mythcat# dnf5 install neovim
...
Package Arch Version Repository Size
Installing:
neovim x86_64 0.10.2-1.fc41 fedora 29.1 MiB
...
Installing weak dependencies:
nodejs x86_64 1:22.11.0-3.fc41 updates 148.5 KiB
nodejs-docs noarch 1:22.11.0-3.fc41 updates 91.9 MiB
nodejs-full-i18n x86_64 1:22.11.0-3.fc41 updates 29.3 MiB
nodejs-npm x86_64 1:10.9.0-1.22.11.0.3.fc41 updates 9.4 MiB
ripgrep x86_64 14.1.1-1.fc41 updates 4.7 MiB
tree-sitter-cli x86_64 0.23.2-1.fc41 updates 12.4 MiB
wl-clipboard x86_64 2.2.1-3.fc41 fedora 140.9 KiB
xsel x86_64 1.2.1-2.fc41 fedora 47.9 KiB
You can see comes with nodejs. I remove the nodejs and I tested nvim and works.
Using the source code works also well:
root@fedora:/home/mythcat# curl -LO https://github.com/neovim/neovim/releases/latest/download/nvim-linux64.tar.gz
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
100 11.4M 100 11.4M 0 0 5739k 0 0:00:02 0:00:02 --:--:-- 14.1M
root@fedora:/home/mythcat# sudo rm -rf /opt/nvim
root@fedora:/home/mythcat# sudo tar -C /opt -xzf nvim-linux64.tar.gz
root@fedora:/home/mythcat# export PATH="$PATH:/opt/nvim-linux64/bin"
root@fedora:/home/mythcat# nvim
Wednesday, January 1, 2025
Fedora 41 : Fix size of logical volume ... happy new year 2025!
Happy New Year 2025!
Today I come with this issue, is very old one ...
mythcat@fedora:~$ sudo vgs
[sudo] password for mythcat:
VG #PV #LV #SN Attr VSize VFree
fedora 1 1 0 wz--n- 73.51g 58.51g
mythcat@fedora:~$ sudo lvresize -l +100%FREE --resizefs /dev/mapper/fedora-root
Size of logical volume fedora/root changed from 15.00 GiB (3840 extents) to 73.51 GiB (18819 extents).
File system xfs found on fedora/root mounted at /.
Extending file system xfs to 73.51 GiB (78932606976 bytes) on fedora/root...
xfs_growfs /dev/fedora/root
meta-data=/dev/mapper/fedora-root isize=512 agcount=4, agsize=983040 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=1, sparse=1, rmapbt=1
= reflink=1 bigtime=1 inobtcount=1 nrext64=1
data = bsize=4096 blocks=3932160, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0, ftype=1
log =internal log bsize=4096 blocks=16384, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 3932160 to 19270656
xfs_growfs done
Extended file system xfs on fedora/root.
Logical volume fedora/root successfully resized.
Saturday, December 28, 2024
Fedora 41 : Flutter first steps ...
Today, I tested flutter starting steps on Fedora 41.
You can find a good tutorial on the Fedora Magazine.
$ uname -a
Linux fedora 6.12.5-200.fc41.x86_64 #1 SMP PREEMPT_DYNAMIC Sun Dec 15 16:48:23 UTC 2024 x86_64 GNU/Linux
mythcat@fedora:~$ sudo su
[sudo] password for mythcat:
root@fedora:/home/mythcat# dnf5 clean all
Removed 53 files, 35 directories. 0 errors occurred.
root@fedora:/home/mythcat# dnf5 update
...
root@fedora:/home/mythcat# dnf5 install bash curl file git unzip which xz zip mesa-libGLU clang cmake ninja-build pkg-config
...
root@fedora:/home/mythcat# exit
exit
mythcat@fedora:~$ mkdir ~/FlutterProjects
mythcat@fedora:~$ cd FlutterProjects/
mythcat@fedora:~/FlutterProjects$ wget https://storage.googleapis.com/flutter_infra_release/releases/stable/linux/flutter_linux_3.16.9-stable.tar.xz
Saving 'flutter_linux_3.16.9-stable.tar.xz'
HTTP response 200 [https://storage.googleapis.com/flutter_infra_release/releaseflutter_linux_3.16.9 100% [=============================>] 627.00M 10.42MB/s
[Files: 1 Bytes: 627.00M [9.41]
...
mythcat@fedora:~/FlutterProjects$ tar xf flutter_linux_3.16.9-stable.tar.xz
mythcat@fedora:~/FlutterProjects$ ll
total 642064
drwxr-xr-x. 11 mythcat mythcat 4096 Jan 25 2024 flutter
-rw-r--r--. 1 mythcat mythcat 657467644 Jan 25 2024 flutter_linux_3.16.9-stable.tar.xz
mythcat@fedora:~/FlutterProjects$ export PATH="$PATH:`pwd`/flutter/bin"
mythcat@fedora:~/FlutterProjects$ cd flutter/bin/
mythcat@fedora:~/FlutterProjects/flutter/bin$ pwd
/home/mythcat/FlutterProjects/flutter/bin
mythcat@fedora:~/FlutterProjects$ flutter doctor
mythcat@fedora:~/FlutterProjects$ flutter upgrade
...Monday, December 16, 2024
Fedora 41 : The cirq python package only with Python 3.12.8.
Today I install the quil python package on Fedora 41, but with an older version of python :
Python 3.12.8 (main, Dec 6 2024, 00:00:00) [GCC 14.2.1 20240912 (Red Hat 14.2.1-3)] on linuxmythcat@localhost:~$ python3.12 -m pip install quil --userFirst, install the python version then install the pip tool:
mythcat@localhost:~$ curl https://bootstrap.pypa.io/get-pip.py | python3.12 -
...
Installing collected packages: pip
Successfully installed pip-24.3.1Next, install with the pip version:
mythcat@localhost:~$ python3.12 -m pip install quil --user
Collecting quilSaturday, December 14, 2024
Fedora 41 : OpenCV example with PyQt6.
Today I tested another source code with opencv, numpy, PyQt6 python packages.
I install opencv python package with dnf5 tool:
root@localhost:/home/mythcat# dnf5 install python3-opencv.x86_64The source code let you to open, change a image and save using sliders and a reset option.
This is the source code:
import sys
import cv2
import numpy as np
from PyQt6.QtWidgets import QApplication, QMainWindow, QWidget, QVBoxLayout, QLabel, QSlider, QFileDialog, QPushButton, QHBoxLayout
from PyQt6.QtGui import QImage, QPixmap
from PyQt6.QtCore import Qt, pyqtSlot
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.setWindowTitle("Real-Time Color Selection")
self.setGeometry(100, 100, 1200, 800)
# Create central widget and main layout
central_widget = QWidget()
self.setCentralWidget(central_widget)
main_layout = QVBoxLayout(central_widget)
# Create image label
self.image_label = QLabel()
main_layout.addWidget(self.image_label)
# Initialize sliders
self.lower_h = QSlider(Qt.Orientation.Horizontal)
self.lower_s = QSlider(Qt.Orientation.Horizontal)
self.lower_v = QSlider(Qt.Orientation.Horizontal)
self.upper_h = QSlider(Qt.Orientation.Horizontal)
self.upper_s = QSlider(Qt.Orientation.Horizontal)
self.upper_v = QSlider(Qt.Orientation.Horizontal)
# Set slider ranges
for slider in [self.lower_h, self.upper_h]:
slider.setRange(0, 179)
for slider in [self.lower_s, self.lower_v, self.upper_s, self.upper_v]:
slider.setRange(0, 255)
# Set initial slider values
self.lower_h.setValue(50)
self.lower_s.setValue(100)
self.lower_v.setValue(50)
self.upper_h.setValue(130)
self.upper_s.setValue(255)
self.upper_v.setValue(255)
# Connect sliders to update function
self.lower_h.valueChanged.connect(self.update_hsv_range)
self.lower_s.valueChanged.connect(self.update_hsv_range)
self.lower_v.valueChanged.connect(self.update_hsv_range)
self.upper_h.valueChanged.connect(self.update_hsv_range)
self.upper_s.valueChanged.connect(self.update_hsv_range)
self.upper_v.valueChanged.connect(self.update_hsv_range)
# Create slider layouts with labels
sliders_layout = QVBoxLayout()
# Add slider pairs with labels
slider_pairs = [
("Lower Hue", self.lower_h),
("Lower Saturation", self.lower_s),
("Lower Value", self.lower_v),
("Upper Hue", self.upper_h),
("Upper Saturation", self.upper_s),
("Upper Value", self.upper_v)
]
for label_text, slider in slider_pairs:
row_layout = QHBoxLayout()
label = QLabel(label_text)
label.setMinimumWidth(120)
row_layout.addWidget(label)
row_layout.addWidget(slider)
sliders_layout.addLayout(row_layout)
main_layout.addLayout(sliders_layout)
# Add buttons
button_layout = QHBoxLayout()
self.reset_button = QPushButton("Reset Values")
self.reset_button.clicked.connect(self.reset_values)
button_layout.addWidget(self.reset_button)
self.open_image_button = QPushButton("Open Image")
self.open_image_button.clicked.connect(self.open_image)
button_layout.addWidget(self.open_image_button)
self.save_button = QPushButton("Save Image")
self.save_button.clicked.connect(self.save_image)
button_layout.addWidget(self.save_button)
main_layout.addLayout(button_layout)
# Process initial image
self.process_image()
def process_image(self):
image_bgr = cv2.imread("image.png")
if image_bgr is None:
image_bgr = cv2.imread("default_image.png")
self.image_bgr = image_bgr
self.image_hsv = cv2.cvtColor(image_bgr, cv2.COLOR_BGR2HSV)
# Create initial mask using current slider values
lower_values = np.array([self.lower_h.value(), self.lower_s.value(), self.lower_v.value()])
upper_values = np.array([self.upper_h.value(), self.upper_s.value(), self.upper_v.value()])
mask_test = cv2.inRange(self.image_hsv, lower_values, upper_values)
image_bgr_masked = cv2.bitwise_and(image_bgr, image_bgr, mask=mask_test)
self.image_rgb = cv2.cvtColor(image_bgr_masked, cv2.COLOR_BGR2RGB)
self.update_image()
def update_image(self):
height, width, channel = self.image_rgb.shape
bytes_per_line = width * channel
q_image = QImage(self.image_rgb.data, width, height, bytes_per_line, QImage.Format.Format_RGB888)
pixmap = QPixmap.fromImage(q_image)
self.image_label.setPixmap(pixmap.scaled(700, 500, Qt.AspectRatioMode.KeepAspectRatio))
def update_hsv_range(self):
lower_values = np.array([self.lower_h.value(), self.lower_s.value(), self.lower_v.value()])
upper_values = np.array([self.upper_h.value(), self.upper_s.value(), self.upper_v.value()])
mask_test = cv2.inRange(self.image_hsv, lower_values, upper_values)
image_bgr_masked = cv2.bitwise_and(self.image_bgr, self.image_bgr, mask=mask_test)
self.image_rgb = cv2.cvtColor(image_bgr_masked, cv2.COLOR_BGR2RGB)
self.update_image()
def reset_values(self):
self.lower_h.setValue(50)
self.lower_s.setValue(100)
self.lower_v.setValue(50)
self.upper_h.setValue(130)
self.upper_s.setValue(255)
self.upper_v.setValue(255)
def open_image(self):
filename, _ = QFileDialog.getOpenFileName(self, "Select Image File", "", "Image Files (*.png *.jpg *.jpeg)")
if filename:
self.image_bgr = cv2.imread(filename)
if self.image_bgr is not None:
self.image_hsv = cv2.cvtColor(self.image_bgr, cv2.COLOR_BGR2HSV)
self.update_hsv_range() # This will apply current filter and update display
def save_image(self):
filename, _ = QFileDialog.getSaveFileName(self, "Save Image", "", "PNG Files (*.png);;JPEG Files (*.jpg)")
if filename:
# Make sure filename has an extension
if not filename.endswith(('.png', '.jpg', '.jpeg')):
filename += '.png'
# Convert and save
output_image = cv2.cvtColor(self.image_rgb, cv2.COLOR_RGB2BGR)
cv2.imwrite(filename, output_image)
if __name__ == "__main__":
app = QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec())
Thursday, December 12, 2024
Fedora 41 : The cirq python package cannot be install - build errors
Today, I tried to use cirq python package on Fedora 41. This need the python version 3.12.
root@localhost:/home/mythcat# dnf install python3.12.x86_6cI got some errors because ask me to install the rust:
root@localhost:/home/mythcat# curl https://sh.rustup.rs -sSf | sh
info: downloading installer
Welcome to Rust!
This will download and install the official compiler for the Rust
programming language, and its package manager, Cargo.
Rustup metadata and toolchains will be installed into the Rustup
home directory, located at:
...
Rust is installed now. Great!
To get started you may need to restart your current shell.
This would reload your PATH environment variable to include
Cargo's bin directory ($HOME/.cargo/bin).
To configure your current shell, you need to source
the corresponding env file under $HOME/.cargo.
This is usually done by running one of the following (note the leading DOT):
. "$HOME/.cargo/env" # For sh/bash/zsh/ash/dash/pdksh
source "$HOME/.cargo/env.fish" # For fishThese are the next steps I used:
root@localhost:/home/mythcat# pip install --upgrade pip
...
root@localhost:/home/mythcat# pip install maturin
...
root@localhost:/home/mythcat# pip install cirq
...
Collecting cirq
Using cached cirq-1.4.1-py3-none-any.whl.metadata (7.4 kB)
...
cargo:rerun-if-env-changed=PYO3_USE_ABI3_FORWARD_COMPATIBILITY
--- stderr
error: the configured Python interpreter version (3.13) is newer than PyO3's maximum supported version (3.12)
= help: please check if an updated version of PyO3 is available. Current version: 0.20.3
= help: set PYO3_USE_ABI3_FORWARD_COMPATIBILITY=1 to suppress this check and build anyway using the stable ABI
💥 maturin failed
Caused by: Failed to build a native library through cargo
Caused by: Cargo build finished with "exit status: 101": `env -u CARGO PYO3_ENVIRONMENT_SIGNATURE="cpython-3.13-64bit" PYO3_PYTHON="/usr/bin/python3" PYTHON_SYS_EXECUTABLE="/usr/bin/python3" "cargo" "rustc" "--features" "pyo3/extension-module" "--message-format" "json-render-diagnostics" "--manifest-path" "/tmp/pip-install-v0zuc831/quil_ebc006157dbd433dbc0890811ee80748/quil-py/Cargo.toml" "--release" "--lib" "--crate-type" "cdylib"`
Error: command ['maturin', 'pep517', 'build-wheel', '-i', '/usr/bin/python3', '--compatibility', 'off'] returned non-zero exit status 1
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed building wheel for quil
Failed to build quil
ERROR: ERROR: Failed to build installable wheels for some pyproject.toml based projects (quil)
Not working ...
Monday, November 25, 2024
Fedora 41 : assembly fasm with cat command and qemu test.
I tested the basic direct binary concatenation where the second file is appended to the end of the first file, preserving all bytes exactly as they are without any linking metadata or relocations with the cat command.
Let's see how can do this.
You need to create two files: kernel.fasm and kernel2.fasm.
First will like this:
org 7C00h
; First stage bootloader
start:
mov [bootdrive], dl
mov ax, 0x2000 ; Load kernel at 0x2000:0
mov es, ax
xor bx, bx ; ES:BX = buffer
mov ah, 02h ; Read sectors
mov al, 6 ; Number of sectors to read
mov ch, 0 ; Cylinder 0
mov cl, 2 ; Start from sector 2
mov dh, 0 ; Head 0
mov dl, [bootdrive]
int 13h
jmp 0x2000:0 ; Jump to second stage
bootdrive db 0
times 510-($-$$) db 0
dw 0xAA55The second one named kernel2.fasm will come with new features:
org 0
COLS equ 80
ROWS equ 25
VIDEO_MEM equ 0xB800
; Box drawing characters
BOX_DR equ 201 ; ╔
BOX_HL equ 205 ; ═
BOX_DL equ 187 ; ╗
BOX_VL equ 186 ; ║
BOX_UR equ 200 ; ╚
BOX_UL equ 188 ; ╝
BOX_BLOCK equ 219 ; █
...Use fasm and cat commands to create the bin files and the result file for qemu:
mythcat@localhost:~/fasm$ ./fasm.x64 kernel.fasm kernel.bin
flat assembler version 1.73.32 (16384 kilobytes memory, x64)
2 passes, 512 bytes.
mythcat@localhost:~/fasm$ ./fasm.x64 kernel2.fasm kernel2.bin
flat assembler version 1.73.32 (16384 kilobytes memory, x64)
2 passes, 132 bytes.
mythcat@localhost:~/fasm$ cat kernel.bin kernel2.bin > os.imgThe last step is to run qemu-system-i386 to test the result
mythcat@localhost:~/fasm$ qemu-system-i386 -fda os.imgThe result is this:
Sunday, November 24, 2024
Fedora 41 : Error gio default application for image.
I run today an old python script in my Fedora 41 to create an image and the result after running was:
mythcat@localhost:~$ python test_001.py
gio: file:///tmp/tmpwy1k4wyo.PNG: Failed to find default application for content type ‘image/png’This can be fixed with an default application for images like feh:
$ sudo dnf5 install fehFedora 41 : remove package lead to unexpected results.
Today I saw the mutter package from Fedora distro come with a new update.
I don't use this package, ... is a mess in my oppinion.
But I found this output when I tried to remove
root@localhost:/home/mythcat# dnf5 remove mutter
Package Arch Version Reposit Size
Removing:
mutter x86_64 47.1-3.fc41 updates 12.5 MiB
Removing dependent packages:
gdm x86_64 1:47.0-8.fc41 updates 5.3 MiB
gnome-shell x86_64 47.1-1.fc41 updates 13.8 MiB
Removing unused dependencies:
accountsservice x86_64 23.13.9-5.fc41 fedora 379.5 KiB
accountsservice-libs x86_64 23.13.9-5.fc41 fedora 212.3 KiB
bluez-obexd x86_64 5.79-1.fc41 updates 345.1 KiB
bolt x86_64 0.9.8-3.fc41 fedora 503.3 KiB
boost-thread x86_64 1.83.0-8.fc41 fedora 136.8 KiB
color-filesystem noarch 1-34.fc41 fedora 151.0 B
colord x86_64 1.4.7-5.fc41 fedora 1.7 MiB
colord-gtk4 x86_64 0.3.1-2.fc41 fedora 35.6 KiB
composefs-libs x86_64 1.0.6-1.fc41 fedora 166.3 KiB
cups-pk-helper x86_64 0.2.7-8.fc41 fedora 379.0 KiB
dbus-daemon x86_64 1:1.14.10-4.fc41 fedora 553.2 KiB
evolution-data-server x86_64 3.54.1-1.fc41 updates 8.8 MiB
evolution-data-server-langpacks noarch 3.54.1-1.fc41 updates 8.8 MiB
flatpak-libs x86_64 1.15.10-1.fc41 fedora 1.0 MiB
...
Is this ok [y/N]: N
... If I used this command the gdm and gnome-shell is gone:
root@localhost:/home/mythcat# dnf5 remove --noautoremove mutter
Package Arch Version Repository Size
Removing:
mutter x86_64 47.1-3.fc41 updates 12.5 MiB
Removing dependent packages:
gdm x86_64 1:47.0-8.fc41 updates 5.3 MiB
gnome-session-wayland-session x86_64 47.0.1-1.fc41 fedora 15.9 KiB
gnome-shell x86_64 47.1-1.fc41 updates 13.8 MiB
Transaction Summary:
Removing: 4 packages
Is this ok [y/N]: N
...I tried with the --noautoremove, and --exclude args and not result:
root@localhost:/home/mythcat# dnf5 remove --noautoremove --exclude=gnome-shell,gdm mutter
Failed to resolve the transaction:
Problem: installed package gnome-shell-47.1-1.fc41.x86_64 requires libmutter-15.so.0()(64bit), but none of the providers can be installed
- installed package gnome-shell-47.1-1.fc41.x86_64 requires libmutter-clutter-15.so.0()(64bit), but none of the providers can be installed
- installed package gnome-shell-47.1-1.fc41.x86_64 requires libmutter-cogl-15.so.0()(64bit), but none of the providers can be installed
- installed package gnome-shell-47.1-1.fc41.x86_64 requires libmutter-mtk-15.so.0()(64bit), but none of the providers can be installed
- installed package gnome-shell-47.1-1.fc41.x86_64 requires mutter(x86-64) >= 47.0, but none of the providers can be installed
- conflicting requests
- problem with installed package
The solution is old rpm tool:
root@localhost:/home/mythcat# rpm -e --nodeps mutter
root@localhost:/home/mythcat# dnf5 remove mutter
No packages to remove for argument: mutter
Nothing to do.
Wednesday, November 20, 2024
Fedora 41 : generated shapes with python !
Today I created this source code in python that generates eight random convex polygons. The idea was to create sprites for a 2D game: snowballs, boulders, or similar objects ... Obviously I also used Sonet 3.5 artificial intelligence. You can find the source code on the pagure account in fedora.
#!/usr/bin/env python3
"""
SVG Polygon Generator
This script generates multiple deformed polygonal shapes and saves them as separate SVG files.
Each polygon maintains convex properties while having controlled random deformations.
Features:
- Generates 8 unique polygonal shapes
- Controls deformation through radial and angular factors
- Maintains convex properties
- Exports each shape to a separate SVG file
- Uses random colors for visual distinction
Usage:
python generate_svgs.py
Output:
Creates 8 SVG files named 'polygon_1.svg' through 'polygon_8.svg'
"""
from lxml import etree
import random
import math
from pathlib import Path
def create_svg_root():
"""Create and return a base SVG root element with standard attributes."""
root = etree.Element("svg")
root.set("width", "500")
root.set("height", "500")
root.set("xmlns", "http://www.w3.org/2000/svg")
return root
def calculate_points(center_x: float, center_y: float, radius: float,
num_sides: int, deform_factor: float) -> list:
"""
Calculate polygon points with controlled deformation.
Args:
center_x: X coordinate of polygon center
center_y: Y coordinate of polygon center
radius: Base radius of the polygon
num_sides: Number of polygon sides
deform_factor: Maximum allowed deformation factor
Returns:
List of tuples containing (x, y) coordinates
"""
points = []
angle_step = 2 * math.pi / num_sides
for i in range(num_sides):
angle = i * angle_step
radial_deform = random.uniform(-deform_factor, deform_factor)
angular_deform = random.uniform(-deform_factor/2, deform_factor/2)
modified_angle = angle + angular_deform
modified_radius = radius * (1 + radial_deform)
x = center_x + modified_radius * math.cos(modified_angle)
y = center_y + modified_radius * math.sin(modified_angle)
points.append((x, y))
return points
def generate_deformed_shapes():
"""Generate multiple deformed polygons and save them to separate SVG files."""
# Base parameters
num_sides = 8
center_x = 250
center_y = 250
base_radius = 150
max_deformation = 0.15
output_dir = Path("generated_polygons")
# Create output directory if it doesn't exist
output_dir.mkdir(exist_ok=True)
for i in range(8):
root = create_svg_root()
points = calculate_points(center_x, center_y, base_radius,
num_sides, max_deformation)
path = etree.SubElement(root, "path")
path_data = f"M {points[0][0]} {points[0][1]}"
path_data += "".join(f" L {p[0]} {p[1]}" for p in points[1:])
path_data += " Z"
path.set("d", path_data)
path.set("fill", "none")
path.set("stroke", f"#{random.randint(0, 16777215):06X}")
path.set("stroke-width", "2")
path.set("opacity", "0.7")
# Save individual SVG file
output_file = output_dir / f"polygon_{i+1}.svg"
tree = etree.ElementTree(root)
tree.write(str(output_file), pretty_print=True,
xml_declaration=True, encoding='utf-8')
print(f"Generated {num_sides} polygons in {output_dir}")
if __name__ == "__main__":
generate_deformed_shapes()
Subscribe to:
Posts (Atom)