How to fix “could not find or load the Qt platform plugin windows” while using Matplotlib in PyCharm

Question

I am getting the error \"could not find or load the Qt platform plugin windows\" while using matplotlib in PyCharm.

How can I solve this?

Answer 1

I solved it by:

• Adding a path:

  \Anaconda3\Lib\site-packages\PyQt5\Qt\bin to PATH.
  

• Setting an environment variable:

  QT_PLUGIN_PATH as \Anaconda3\Lib\site-packages\PyQt5\Qt\plugins or \Anaconda3\Library\plugins.

• Also, you can try:

  pyqt = os.path.dirname(PyQt5.__file__)
  os.environ['QT_PLUGIN_PATH'] = os.path.join(pyqt, "Qt/plugins")
  

Answer 2

I tried the following at Anaconda's prompt, and it solved this problem:

conda remove qt
conda remove pyqt 
conda install qt 
conda install pyqt

Answer 3

copy the plugins from PySide2 and paste and overwrite the existing plugins in Miniconda worked for me.

(base) C:\ProgramData\Miniconda3\Lib\site-packages\PySide2\plugins\platforms>copy *.dll  C:\ProgramData\Miniconda3\Library\plugins\platforms\