I added better paste support to bpython-curtsies this week, and when I finally got around to testing the feature in Python 3 I found things weren't working as expected. The bug was to do with doing ...

import os,string is OK. But if I have two modules 'foo.py' and 'bar.py' in the same folder, and foo.py does import bar then the import fails if I run foo.py, it cannot find bar. This works fine with a ...

The only time to pickle something is if you need to represent a non-string object on disk, but Python code is strings. I presume that the receiving program is basically calling eval (skt.recv ()).