How to debug a Python module run with python -m from the command line?

Question

I know that a Python script can be debugged from the command line with

python -m pdb my_script.py

if my_script.py is a script

Answer 1

You can add pdb.set_trace() in your code for interactive debugging, before the code you want to debug.

class C:    
    def __init__(self, x):
        self.x = x

    def inst_f(self):
        pass

a = C('this is a')
import pdb
pdb.set_trace()
b = C('this is b')

print a.x is b.x

Running this will output

> c:\python27\tests\test.py(11)()
-> b = C('this is b')
(Pdb) 

And let you use python debugger.