How do you break into the debugger from Python source code?

Question

What do you insert into Python source code to have it break into pdb (when execution gets to that spot)?

Answer 1

import pdb; pdb.set_trace() 

See Python: Coding in the Debugger for Beginners for this and more helpful hints.

Answer 2

As of Python 3.7, you can use breakpoint() - https://docs.python.org/3/library/functions.html#breakpoint