PyChecker

#!/usr/bin/python

def a_dict():
return {1:2}

def main():
dict_a = {
'hello': 'world'
}

dict_a.update(a_dict())

dict_b = {
'hello': 'again'
}

dict_b.update(a_dict())

main()

Gives the warning ../../../test.py:11: Object (dict_a) has no attribute
(update)
Note that the corresponding operation for dict_b does not give a warning.