Hello!
Just for the record since this is an old thread. PyCharm will install opencv-python effortlessly!
Navigate, in the Pycharm IDE,
Project → External Libraries → New → Python Package → <specify the package you want to install>
If you encountered an error with your:
import cv2
statement, then use the context action to install the package by overriding the package name in the Helper message window.
Regards.
P.S.
FWIW, always use virtual environments when working with Pycharm - you probably know that already!