Python just hangs in IDE works elsewhere (beginner/installation)

So, I'm new to Python and to the kind of system admin stuff that I'm
having to do to get it work, so I may be making an obvious error.

I'm on MacOSX 10.8.something...

I used Macports to install python27, virtualenv, (I couldn't get virtualenvwrapper
to install for some reason, so I blew it off), pip.

I used the command line to set python, virtualenv and pip to the macports versions.

If I use the command line to execute a helloworld.py, it works fine.

I then installed Pycharm. No matter which python I set as the interpreter, I get the
same behavior... I hit run and the intepreter starts and just hangs there and does
nothing... eventually if I hit the stop button it will exit without error, code 0.

If instead of running I click on debug, I get this error:
/usr/local/bin/python /Applications/PyCharm.app/helpers/pydev/pydevd.py –multiproc –client 127.0.0.1 –port 49826 –file
Traceback (most recent call last):
  File "/Applications/PyCharm.app/helpers/pydev/pydevd.py", line 1402, in <module>
    setup = processCommandLine(sys.argv)
  File "/Applications/PyCharm.app/helpers/pydev/pydevd.py", line 1169, in processCommandLine
    setup['file'] = argv[i]
IndexError: list index out of range

Process finished with exit code 1

This happens no matter which python interpreter I use.

If I run the interactive console, it works fine, as expected.

Anyone have any idea what's going on?

(By helloworld.py I liteally mean one line, Print ("test"), and that's it.)