How to watch for a variable change in python without dunder setattr or pdb

Question

There is large python project where one attribute of one class just have wrong value in some place.

It should be sqlalchemy.orm.attributes.InstrumentedAttribute, but

Answer 1

You can use the python debugger module (part of the standard library)

To use, just import pdb at the top of your source file:

import pdb

and then set a trace wherever you want to start inspecting the code:

pdb.set_trace()

You can then step through the code with n, and investigate the current state by running python commands.