Mine

>>> mymodule = __import__("./petunial/components/_installer/database")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: Empty module name
>>> mymodule = __import__("petunial/components/_installer/database")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named petunial/components/_installer/database
>>> mymodule = __import__("banana-rama")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named banana-rama