While running a Python Flask service in PDB, how do you pause/interrupt?

Question

I'm currently trying to debug memory usage of a python flask program, and I'm able to run the program in PDB by adding:

import pdb
pdb.set_trace()

At the entry point of my server. Then I tell PDB to continue and run the program.

I've read that by doing Ctrl-C, I can pause a program running in PDB, but it appears Flask is catching the KeyboardInterrupt exception:

^CKeyboardInterrupt
Traceback (most recent call last):
  File "./server.py", line 4, in <module>
    from mauie.defaults import *
  File "/lib/python2.7/site-packages/flask_socketio/__init__.py", line 414, in run
  File "/lib/python2.7/site-packages/gevent/baseserver.py", line 284, in serve_forever
  File "/lib/python2.7/site-packages/gevent/event.py", line 77, in wait
  File "/lib/python2.7/site-packages/gevent/hub.py", line 338, in switch
KeyboardInterrupt

But the PDB prompt never comes up.

Answer 1

set_trace() is simply a Python function, so you can call it at any point in your code. Have you considered simply adding additional breakpoints to your code and looking at the memory that way?