PyCharm “no module named sys”

Question

Using PyCharm community edition and Python 2.7,

import traceback
import sys

No problem on the first line, which implies that I have pointed PyC

Answer 1

I had this issue and I resolved it by updating the default project settings under File -> Default Settings -> Project Interpreter and then in the drop down list for Project Interpreter, selecting the same interpreter as the Run Configuration was using (in my case python 3.6)