pdb2.5 − the Python debugger
pdb2.5 script [...]
See /usr/lib/python2.5/pdb.doc for more information on the use of pdb. When the debugger is started, help is available via the help command.
python2.5(1). Chapter 9 of the Python Library Reference (The Python Debugger). Available in the python2.5-doc package at /usr/share/doc/python2.3/html/lib/module-pdb.html.