Run a Python Qt application on Ubuntu 20.04

[PythonQTMarlem]

Thanks for the answer. I want to use PyQt5. I have already installed PyCharm. when I call in the terminal:

sudo apt-get install python3-pyqt5 the message "python3-pyqt5 is already the latest version (5.14.1 + dfsg-3build1)".

If I want to do this in the terminal:

/ home / markus / PycharmProjects / PythonTest / venv / bin / python /home/markus/PycharmProjects/PythonTest/Ubuntu.py

comes the error message: raceback (most recent call last):
  File "/home/markus/PycharmProjects/PythonTest/Ubuntu.py", line 2, in <module>
    from qtpy import QtWidgets
ModuleNotFoundError: No module named 'qtpy'

Question: What am I doing wrong?

[JonB]

@PythonQTMarlem said in Run a Python Qt application on Ubuntu 20.04:

from qtpy import QtWidgets

I have never heard of from qtpy anything, so where do you get that from/why do you expect it to generate anythong other than

ModuleNotFoundError: No module named 'qtpy'

?

Furthermore, although the spacing of your command line seems incorrect, you seem to be running python as the name of the executable? I don't know about your venv/bin/python, but did you take the trouble to read what I wrote earlier about this to verify that's correct?

Finally, if you are using Python virtual environments, you're on your own for checking the docs about whatever you need to get that working correctly.

[PythonQTMarlem]

@JonB said in [Run a Python Qt application on Ubuntu 20 \ .04] (/ post / 597283):

@PythonQTMarlem said in [Run a Python Qt application on Ubuntu 20 \ .04] (/ post / 597262):

from qtpy import QtWidgets

I saw it in a Youtube video.
probably comes from:
''
import os, sys
from PyQt5 import QtCore, QtWidgets
''

[JonB]

@PythonQTMarlem
I don't understand. That says

from PyQt5 import QtWidgets

But you say your code has

from qtpy import QtWidgets

with error

ModuleNotFoundError: No module named 'qtpy'

So I'm still not understanding where you get to use qtpy from?

[PythonQTMarlem]

@JonB said in Run a Python Qt application on Ubuntu 20.04:

PyQt5
how can I check if the installation of PyQt5 in Ubuntu was successful?

[JonB]

@PythonQTMarlem
You wrote earlier:

sudo apt-get install python3-pyqt5 the message "python3-pyqt5 is already the latest version (5.14.1 + dfsg-3build1)".

[SGaist]

@JonB AFAIK, qtpy is one of the Python wrappers that allows to use either version of PySide2 or PyQt5 with the same code base.

[JonB]

@SGaist said in Run a Python Qt application on Ubuntu 20.04:

@JonB AFAIK, qtpy is one of the Python wrappers that allows to use either version of PySide2 or PyQt5 with the same code base.

Ohhhhh! :)

Well in that case it's not doing a very good job if the OP reports:

comes the error message: raceback (most recent call last):
  File "/home/markus/PycharmProjects/PythonTest/Ubuntu.py", line 2, in <module>
    from qtpy import QtWidgets
ModuleNotFoundError: No module named 'qtpy'

:) It's not the QtWidgets that's at issue, it's the qtpy. So doesn't he have to install something for qtpy, presumably? Perhaps to do with where the OP is looking, or I've even suggested he might be executing Python 2....

[SGaist]

The wrapper has to be installed like any other Python module.

[jsulm]

@PythonQTMarlem said in Run a Python Qt application on Ubuntu 20.04:

/ home / markus / PycharmProjects / PythonTest / venv / bin / python

Try with python3 instead with python as python on Ubuntu means Python 2, but you installed for Python 3. @JonB already mentioned that, but it seems you ignored that?