You can assign to sys.modules['B']
before importing A
to get what you want:
test.py:
import sys
sys.modules['B'] = __import__('mock_B')
import A
print(A.B.__name__)
A.py:
import B
Note B.py does not exist, but when running test.py
no error is returned and print(A.B.__name__)
prints mock_B
. You still have to create a mock_B.py
where you mock B
‘s actual functions/variables/etc. Or you can just assign a Mock()
directly:
test.py:
import sys
sys.modules['B'] = Mock()
import A