How to use pyinstaller with matplotlib in use

You can try to solve this problem by installing older versions of the matplotlib package. eg:

pip install matplotlib==3.2.2

In --onefile mode, based on this commit by a PyInstaller contributor, which references https://github.com/pyinstaller/pyinstaller/issues/5004, you can just modify PyInstaller\hooks\hook-matplotlib.py so that it has:

datas = [
    (mpl_data_dir, "matplotlib/mpl-data"),
]

instead of

datas = [   datas = [
    (mpl_data_dir, "mpl-data"),
]