PyDojoE9S9

my_module.py

import sitecustomize

foobar = 42

print(foo)

# Prints
# name 'foo' is not defined
# Did you mean foobar?

sitecustomize.py

import sys
import re

RX = re.compile(r"name \'(?P<variable>\w+)\' is not defined")

original_hook = sys.excepthook


def custom_exception_handler(etype, value, tb):
    if issubclass(etype, NameError):
        print(value)
        name = RX.match(str(value)).groupdict()['variable']
        for sym in tb.tb_frame.f_globals:
            if sym.startswith(name):
                print("Did you mean {}?".format(sym))
        return
    original_hook(etype, value, tb)


def install_custom_hook():
    sys.excepthook = custom_exception_handler


install_custom_hook()