Debugging embedded python

[kalita]

I'm a Python newbie, and I'm looking for a way to debug Python scripts
run from a C++ program by using PyRun_FileEx() function.

So far I tried pdb, but it only raises bdb.BdbQuit exception in a line
immediately after pdb.set_trace() is called. I guess it's because it
is not running under normal Python interpreter, but just as well I may
be doing something wrong.

Can you please suggest what I may be doing wrong with pdb, or maybe
another python debugger?

cheers,
Marcin