Questions about the difference between mock.patch () and mock.patch.object ()

Hello, everyone!

this may be a question about the difference between unittest.mock.patch () and unittest.mock.patch.object () . The following code works normally when using mock.patch.object () . I don"t understand why an error ModuleNotFoundError: No module named "Person" will be reported when using mock.patch () . Is it absolutely impossible to use mock.patch () ?

-sharp py_unittest.py

from unittest import TestCase
from unittest.mock import patch
from unittest import main
     
     
class Person(object):
    def __init__(self, name):
        self.name = name
        
    def print_name(self):
        print("My name is " + self.name)
        
    def print_parents(self):
        mother = input("Enter mother"s name: ")
        father = input("Enter father"s name: ")
     
        print("{}"s parents are {} and {}.".format(self.name, mother, father))
        self.fake_func()

    def fake_func(self):
        pass

class FuncTest(TestCase):
    def test_print_parents(self):
        john = Person("John")
             
        with patch("builtins.input") as mocked_input:
            mocked_input.side_effect = ("Jo", "Lee")
            with patch("builtins.print") as mocked_print:
                with patch.object(Person, "fake_func") as mocked_fake_func:
                -sharp with patch("Person.fake_func") as mocked_fake_func:  ModuleNotFoundError: No module named "Person"
                    john.print_parents()
                    mocked_print.assert_called_with("John"s parents are Jo and Lee.")
                    mocked_fake_func.assert_called_once()
 
if __name__ == "__main__":
    main()

class Person(object): def __init__(self, name): self.name = name def print_name(self): print('My name is ' + self.name) def print_parents(self): mother = input("Enter mother's name: ") father = input("Enter father's name: ") print("{}'s parents are {} and {}.".format(self.name, mother, father)) self.fake_func() def fake_func(self): pass

from unittest import TestCase from unittest.mock import patch from unittest import main from person import Person class FuncTest(TestCase): def test_print_parents(self): john = Person('John') with patch('builtins.input') as mocked_input: mocked_input.side_effect = ('Jo', 'Lee') with patch('builtins.print') as mocked_print: -sharp with patch.object(person.Person, "fake_func") as mocked_fake_func: with patch('person.Person.fake_func') as mocked_fake_func: john.print_parents() mocked_print.assert_called_with("John's parents are Jo and Lee.") mocked_fake_func.assert_called_once() if __name__ == '__main__': main()