In PyCharm, I've added the Python environment
from gnuradio import gr
Go into Settings -> Project Settings -> Project Interpreter.
Then press configure interpreter, and navigate to the "Paths" tab.
Press the + button in the Paths area. You can put the path to the module you'd like it to recognize.
Open the python interpreter where you can import the module.
>> import gnuradio >> gnuradio.__file__ "path/to/gnuradio"
Most commonly you'll have a folder structure like this:
foobarbaz/ gnuradio/ __init__.py other_file.py
You want to add foobarbaz to the path here.