Traceback of hanged process

[Hynek Hanke]

Hello,

please, how do I create a pythonic traceback from a python process that
hangs and is not running in an interpreter that I executed manually
or it is but doesn't react on CTRL-C etc? I'm trying to debug a server
implemented in Python, so I need some analog of 'gdb attach' for C. 

Unfortunatelly, googling and reading documentation revealed nothing, so
please excuse if this question is dumb.

Thank you,
Hynek Hanke