How to fix “ImportError: unable to find Qt5Core.dll on PATH” after pyinstaller bundled the python application

Question

Can\'t run QT based GUI application bundled by pyinstaller, the console output shows it is due to an import error:

ImportError: unable to find

Answer 1

I solved this for myself by commenting all in site-packages\PyQt5\__init__.py and adding this code from an older version of QT __init__.py:

import os as _os

_path = _os.path.dirname(__file__) + '\\Qt\\bin;' + _os.environ['PATH']
_os.environ['PATH'] = _path