#----------------------------------------------------------------------------- # Copyright (c) 2013-2023, PyInstaller Development Team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # # The full license is in the file COPYING.txt, distributed with this software. # # SPDX-License-Identifier: Apache-2.0 #----------------------------------------------------------------------------- # matplotlib will create $HOME/.matplotlib folder in user's home directory. In this directory there is fontList.cache # file which lists paths to matplotlib fonts. # # When you run your onefile exe for the first time it's extracted to for example "_MEIxxxxx" temp directory and # fontList.cache file is created with fonts paths pointing to this directory. # # Second time you run your exe new directory is created "_MEIyyyyy" but fontList.cache file still points to previous # directory which was deleted. And then you will get error like: # # RuntimeError: Could not open facefile # # We need to force matplotlib to recreate config directory every time you run your app. def _pyi_rthook(): import atexit import os import shutil import _pyi_rth_utils.tempfile # PyInstaller's run-time hook utilities module # Isolate matplotlib's config dir into temporary directory. # Use our replacement for `tempfile.mkdtemp` function that properly restricts access to directory on all platforms. configdir = _pyi_rth_utils.tempfile.secure_mkdtemp() os.environ['MPLCONFIGDIR'] = configdir try: # Remove temp directory at application exit and ignore any errors. atexit.register(shutil.rmtree, configdir, ignore_errors=True) except OSError: pass _pyi_rthook() del _pyi_rthook