[FIXED] Invalid Python SDK Error while using Python 3.4 on PyCharm

Issue

When I switch my PyCharm to use Python 3.4.3 and I am getting the error:

Invalid Python SDK

Also PyCharm does not automatically find the Python 3.4 interpreter for me, even though it is on the desired path /Library/Frameworks/Python.framework/Versions/3.4/bin/python3.4. See the screenshot:

Despite this the interpreter does work. I am able to get correct output as expected, but code completion related to Python 3.4 is not working.

E.g. print("hello world!) still shows an error on the editor, but the console shows the correct output.

Solution

I had the same issue. Try to comment/remove the PYTHONPATH variable in your ~/.bash_profile

#export PYTHONPATH=/usr/local/lib/python2.7/site-packages/

If it does not help it also may be useful to look in the idea.log for the errors:

/Users/username/Library/Logs/PyCharm40/idea.log

I had the following errors:

Your PYTHONPATH points to a site-packages dir for Python 2.x but you are running Python 3.x!
     PYTHONPATH is currently: "/usr/local/lib/python2.7/site-packages/"
     You should `unset PYTHONPATH` to fix this.

Answered By - mennanov