Python：無法使用包內的模塊

Question

我在模塊中有一些代碼

import pygame
from pygame.locals import *

import reusable

from state import state

class TitleState(state.State):
    def __init__(self):
        #Create data batches
        self.soundbatch = reusable.resourceloader.ResourceBatch(path="data/sound", type="ogg")
        self.imagebatch = reusable.resourceloader.ResourceBatch(path="data/image", type="tga")

        #Reusable stuff
        self.inputengine = reusable.inputengine.InputEngine()
        self.mousehandler = reusable.mousehandler.MouseHandler()

    def update(self):
        pygame.event.pump()

但這給了我錯誤

Traceback (most recent call last):
  File "C:\Users\Administrator\Desktop\MegaCity\Start.py", line 1, in <module>
    import megacity.megacity
  File "C:\Users\Administrator\Desktop\MegaCity\megacity\megacity.py", line 37, in <module>
    themc = MegaCity()
  File "C:\Users\Administrator\Desktop\MegaCity\megacity\megacity.py", line 25, in __init__
    self.titlestate = titlestate.TitleState()
  File "C:\Users\Administrator\Desktop\MegaCity\state\titlestate.py", line 21, in __init__
    self.inputengine = reusable.inputengine.InputEngine()
AttributeError: 'module' object has no attribute 'inputengine'

但是，可重用目錄肯定在其中包含“ inputengine”：

 Directory of C:\Users\Administrator\Desktop\MegaCity\reusable

10/09/2012  05:29 PM    <DIR>          .
10/09/2012  05:29 PM    <DIR>          ..
10/08/2012  09:34 PM             3,920 inputengine.py
10/09/2012  04:54 PM             1,364 mousehandler.py
10/08/2012  09:42 PM               799 resourceloader.py
10/09/2012  05:32 PM                 2 __init__.py
10/09/2012  05:32 PM    <DIR>          __pycache__

但是，當我from reusable import inputengine它進口inputengine就好了。 另外，當在__init__.py可重用時，我from . import inputengine放from . import inputengine from . import inputengine代碼即可。 有什么見解嗎？

Answer 1

它應該是這樣工作的（不是錯誤，而是功能）。

您必須在導入中包含絕對導入的軟件包名稱，如果您不想這樣做，則可以使用發現的相對導入（即from . import inputengine ）。