ModuleNotFoundError: No module named 'matplotlib.backends.backend_qt4agg'

[quochung2310]

I am trying this command: python PyDP4_GUI.py

Then error showed: Traceback (most recent call last): File "/home/duc/DP5/PyDP4_GUI.py", line 8, in <module> from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas ModuleNotFoundError: No module named 'matplotlib.backends.backend_qt4agg' (Sorry, I don't know how to insert line break inside the block code) Run command: sudo apt-get install python-matplotlib-qt4

Resulted in error: E: Unable to locate package python-matplotlib-qt4

My pc is Kubuntu 22.04 Any suggestion please? Thank you very much!

[quochung2310]

Ok, I solved it after several steps. However, I am not sure which one is the key solution ^^

First, I tried to install PyQT4 using this method: https://ubuntuhandbook.org/index.php/2020/07/install-qt4-ubuntu-20-04/

Run again, but it still showed the same error

Second: Edit PyDP4_GUI.py file with text editor, then change line 8 matplotlib.backends.backend_qt4agg to matplotlib.backends.backend_qt5agg

Then it worked ^^!

P/s: for anyone failed for other reasons (i.e. some modules not found), try to install them with command pip install I wrote this line for Linux beginners like me ^^

[Jonathan-Goodman]

I think the issue here may be the version of matplotlib.

This runs fine for me with matplotlib 3.4.3 The latest version has changed: https://matplotlib.org/stable/api/backend_qt_api.html

If you have the latest version, might try changing the import statement to: from matplotlib.backends.backend_qtagg import FigureCanvasQTAgg as FigureCanvas from matplotlib.backends.backend_qtagg import NavigationToolbar2QT as NavigationToolbar

Does it fix the problem?

Jonathan

From: quochung2310 @.> Reply to: Goodman-lab/DP5 @.> Date: Thursday, 18 August 2022 at 05:00 To: Goodman-lab/DP5 @.> Cc: Subscribed @.> Subject: [Goodman-lab/DP5] ModuleNotFoundError: No module named 'matplotlib.backends.backend_qt4agg' (Issue #67)

I am trying this command: python PyDP4_GUI.py

Then error showed: Traceback (most recent call last): File "/home/duc/DP5/PyDP4_GUI.py", line 8, in from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas ModuleNotFoundError: No module named 'matplotlib.backends.backend_qt4agg'

Run command: sudo apt-get install python-matplotlib-qt4

Resulted in error: E: Unable to locate package python-matplotlib-qt4

My pc is Kubuntu 22.04 Any suggestion please? Thank you very much!

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