TL;DR: Relative imports are gone. Use absolute imports instead.
Either use:
from Phone.Pots import Pots
or:
from .Pots import Pots
The problem occurs because Pots is part of the Phone package: there is no module named Pots, there's a module named Phone.Pots.
Python 2 had a feature called relative imports that let you write import Pots even if that was not technically correct.
Relative imports however are a source of problems and confusion:
- Who reads the code cannot immediately say whether the import is from a package or not.
- How come the module is named
Phone.Pots, but I can use import Pots? This is highly inconsistent.
- What if the submodule shadows a name of another module?
For these reasons, relative imports were removed from Python 3.
You can get rid of relative imports from Python 2 by using a __future__ import:
from __future__ import absolute_import
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
