Warning: Matplotlib 'agg' Backend Issue Prevents Figure Display in PyCharm

Plotting a simple graph in PyCharm with matplotlib gives a non-GUI backend warning. Switching to backend ‘Qt5Agg’ leads to a missing PyQt5 error. Example:

import matplotlib.pyplot as mpp
mpp.plot([2, 4, 6], [1, 3, 2])
mpp.show()

How can I properly display my graph?

The solution I found involves both changing the backend and ensuring that all dependencies are properly installed. In my case, I ran ‘pip install PyQt5’ to satisfy the dependency, and then configured the backend to use ‘Qt5Agg’ by including ‘matplotlib.use(“Qt5Agg”)’ at the beginning of my script. Additionally, I observed that running the script in the correct execution environment, for instance using the PyCharm run configuration rather than the Python console, helps in properly rendering the figure without backend warnings.

hey, i had a simmilar issue. did u try updating your matplotlib and pyqt libs? i ran my script from a terminal and it worked fine. have u checked for other config mismatches? curious, did any alternative backend configs work for you?

hey, i fixed a simmilar prob by switching to tkagg and ensuring my tkinter libs were installed. running the script in pycharm’s run config instead of the console really helped me out. give it a try!

When I encountered a similar issue, I discovered that setting the backend in a dedicated matplotlib configuration file rather than in the script can sometimes resolve conflicts. I created a matplotlibrc file in my working directory with the line backend: Qt5Agg to ensure consistency across environments. In addition, I verified that my PyCharm interpreter was correctly set to use an interpreter with the necessary GUI toolkit installed. This approach provided a more stable and reproducible plotting environment across different runs.

hey, i had a similar issue. i enabled interactive mode with mpp.ion() after switching to tkagg and ran the script in run config. also, check your packages are updated. hope it helps!