Refrence: https://www.jetbrains.com/help/pycharm/configuring-python-interpreter.html#add-existing-interpreter
Modify a Python interpreter:
Open the IDE settings > select Project <project name> | Python Interpreter
> Expand the list of the available interpreters and click the Show All link.
> Select the target interpreter and click Edit
> specify an alternative interpreter name for the selected interpreter.
> Click OK to apply the changes.