Pycahrm reports an error: indentation error: unindent does not match any outer indentation

pycahrm Report errors IndentationError: unindent does not match any outer indentation

The indentation error ：IndentationError: unindent Does not match any external indents
            This error occurs because of spaces and Tab Key mix

Method 1 ： stay File → Settings → Code Style → Python Make the following settings in

Method 2 ： Use pycharm Own code formatting shortcut Ctrl+Alt+L , Note whether the shortcut key has been occupied by other software （ Such as ：QQ）


pycharm Shortcut key modification :
   Enter the first File → Settings → Keymap → Main Menu → Code → Folding in
   Right click Remove Ctrl+Alt+L   Again Add Keyboard Shortcut Set it as a shortcut key that you are familiar with and have not been occupied