cv2.error: OpenCV

cv2.error: OpenCV(4.5.1) C:\Users\appveyor\AppData\Local\Temp\1\pip-req-buil windows下的解决方案

环境：win10

报错信息：cv2.error: OpenCV(4.5.1) C:\Users\appveyor\AppData\Local\Temp\pip-req-build-memyuvq3\opencv\modules\highgui\src\window.cpp:651: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvShowImage'

报错代码：

cv2.imshow("Demo", frame)

好像是版本原因，解决方案：

pip uninstall opencv-python
pip install opencv-python