Install PyQt5 on Ubuntu with python3. Steps to set up PyQt5 (ubuntu). With python code generation

Install PyQt5 on Ubuntu with python3 .md

Installation

pip3 install --user pyqt5  
sudo apt-get install python3-pyqt5  
sudo apt-get install pyqt5-dev-tools
sudo apt-get install qttools5-dev-tools

---

Configuring to run from terminal

$ qtchooser -run-tool=designer -qt=5

OR

Write the following in /usr/lib/x86_64-linux-gnu/qt-default/qtchooser/default.conf

/usr/lib/x86_64-linux-gnu/qt5/bin
/usr/lib/x86_64-linux-gnu

---

Code Generation

Create uic.py file.

#!/usr/bin/python3

import subprocess
import sys

child = subprocess.Popen(['pyuic5' ,'-x',sys.argv[1]],stdout=subprocess.PIPE)

print(str(child.communicate()[0],encoding='utf-8'))

$ chmod +x uic.py

Create a symlink:

$ sudo ln uic.py "/usr/lib/x86_64-linux-gnu/qt5/bin/uic"

---

Desktop Entry

[Desktop Entry]
Name=Qt5 Designer
Icon=designer
Exec=/usr/lib/x86_64-linux-gnu/qt5/bin/designer
Type=Application
Categories=Application
Terminal=false
StartupNotify=true
Actions=NewWindow

Name[en_US]=Qt5 Designer

[Desktop Action NewWindow]
Name=Open a New Window
Exec=/usr/lib/x86_64-linux-gnu/qt5/bin/designer

save in ~/.local/share/application with .desktop extension

Top-notch tutorial in that it works without a lot of knowledge about Ubuntu! I think it's possible that the Desktop Entry section is no longer needed. If you decide to keep it, it needs a minor update.

When I have finished the tutorial and Show Application in Ubu 18, I see two for designer. One has a generic icon and the other has an icon specific to Qt.

The .desktop file with is in /usr/share/applications/designer-qt5.desktop with a modification date in 2018 so I suppose it was installed along with Qt. The .desktop file for the the item with the generic logo is in the one I created following the tutorial.

So, two issues:

1. if the desktop files are installed with QT do we really need the Desktop Entry section in the tutorial?
2. if you do keep that section I suggest changing "Icon=designer" to "Icon=designer-qt" since this creates the desktop entry with Qt's icon.

This is great work. Thanks again.

Thank you.

God bless you

When I run the last command I am getting this error "E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?". How do I fix this please

I also get "Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-dm9du9iv/PyQt5/" like sahilparekh did.
We are getting it when attempting to use the first command: pip3 install --user PyQt5
Looks like it searches for the file /tmp/pip-build-dm9du9iv/PyQt5/setup.py
Once not found - it fails.
Complete outpu:

Collecting PyQt5
  Using cached https://files.pythonhosted.org/packages/4d/81/b9a66a28fb9a7bbeb60e266f06ebc4703e7e42b99e3609bf1b58ddd232b9/PyQt5-5.14.2.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/usr/lib/python3.6/tokenize.py", line 452, in open
        buffer = _builtin_open(filename, 'rb')
    FileNotFoundError: [Errno 2] No such file or directory: '/tmp/pip-build-dm9du9iv/PyQt5/setup.py'
    
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-dm9du9iv/PyQt5/

I'm also getting "python setup.py egg_info" failed with error code 1 ..." . Did anyone get a fix for this yet? I tried "pip3 install --user pyqt5==5.14" as mentioned above but same problem?

Hi @SteveF161,
I don't know how I finally got passed the error as it was some time ago.
But I can show the output I get now as it might give you a clue:

$ pip3 install --user PyQt5
Requirement already satisfied: PyQt5 in /home/liron/.local/lib/python3.6/site-packages (5.14.2)
Requirement already satisfied: PyQt5-sip<13,>=12.7 in /home/liron/.local/lib/python3.6/site-packages (from PyQt5) (12.7.2)
WARNING: You are using pip version 20.1; however, version 20.2.2 is available.
You should consider upgrading via the '/usr/bin/python3 -m pip install --upgrade pip' command.

Hello @SteveF161 I can confirm @LionOpeter 's suggestion to update pip3
pip3 install --upgrade pip
worked for me on Ubuntu 18.04 LTS

I got this error, someone can help me:

/usr/bin/python3.8 /home/dung/PycharmProjects/detai/main.py
QObject::moveToThread: Current thread (0x19ebfd0) is not the object's thread (0x20abd70).
Cannot move to target thread (0x19ebfd0)

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/dung/.local/lib/python3.8/site-packages/cv2/qt/plugins" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl.

Process finished with exit code 134 (interrupted by signal 6: SIGABRT)

Crystal clear instruction how to install PyQt5. Works like a charm!

Thanks for the instruction.

This still works on ubuntu 20.04!!!
Thank you so much!!!

Thank you, you helped me a lot

Hi @ujjwal96 ,

I am trying to install a ML package iLearnPlus
I made a separate conda environment on Ubuntu 22-04 and followed all the instructions while installing PyQt5 which you have recommended here.
I am still getting an error:

python iLearnPlus.py 
Traceback (most recent call last):
  File "iLearnPlus.py", line 5, in <module>
    from PyQt5.QtWidgets import (QApplication, QMainWindow, QWidget, QDesktopWidget, QLabel, QHBoxLayout, QMessageBox, QAction, QFileDialog)
ImportError: /home/amit/miniconda3/envs/ilearn/lib/python3.8/site-packages/PyQt5/QtWidgets.abi3.so: undefined symbol: _ZdlPvm, version Qt_5

Kindly help. Regards.

Ha! How funny that you got 132 stars for forking a gist of mine that got none. That's the story of my life. ;)

AFAIK I didn't fork anything. I only commented.

…

-- Wes

On Fri, May 3, 2024 at 12:31 PM Mike Bee ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ Ha! How funny that you got 132 stars for forking a gist of mine that got none. That's the story of my life. ;) — Reply to this email directly, view it on GitHub <https://gist.github.com/r00tdaemon/1dcd57542bdaf3c9d1b0dd526ccd44ff#gistcomment-5045357> or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAPL7O65PPVEBFKA55GBB7DZAPQ2BBFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDUOJ2WLJDOMFWWLO3UNBZGKYLEL5YGC4TUNFRWS4DBNZ2F6YLDORUXM2LUPGBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVA2TANZRG43TQNVHORZGSZ3HMVZKMY3SMVQXIZI> . You are receiving this email because you commented on the thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .

That's funny. I forked yours. I'm getting old.