Pyqt5, Matplotlib incompatibility?

[Samuel.Liu_]

Im trying to display a graph with data generated from a Gui using matplotlib.
It does not work if i import QFileDialog and try to do plt.show(block=False)

Ive done fresh pip installs of both pyqt5 and matplotlib and here is some code to reproduce:

import matplotlib.pyplot as plt

from PyQt5.QtWidgets import QFileDialog

a=[1,2,3]
plt.plot(a)
plt.show(block=False)

[SGaist]

Hi,

Did you try to tell matplotlib to explicitly use its Qt backend ?

[jsulm]

@Samuel-Liu_ said in Pyqt5, Matplotlib incompatibility?:

It does not work if i import QFileDialog

What does "does not work" mean exactly? What happens?

[Samuel.Liu_]

This post is deleted!

[Samuel.Liu_]

@jsulm A Non responsive white box appears and crashes python

[jsulm]

@Samuel-Liu_ And this does not happen if you remove

from PyQt5.QtWidgets import QFileDialog

?

[Samuel.Liu_]

@jsulm This does not happen.
I can also only post every 10 minutes because of the reputation restriction here

[Samuel.Liu_]

@jsulm Can you replicate the issue? I want to know if its just me

[jsulm]

@Samuel-Liu_ Start the script from a terminal and see whether there are any errors/warnings.

[Samuel.Liu_]

@jsulm No errors just an unresponsive white box

[SGaist]

Hi,

Did you try to tell matplotlib to explicitly use its Qt backend ?

[Samuel.Liu_]

@SGaist No I did not, much thanks for the idea.

It works perfectly now. To use matplotlib's Qt backend use the following:

import matplotlib
matplotlib.use('Qt5Agg')