問題：
I have four different files named: main.py , vector.py , entity.py and physics.py .我有一個名爲四種不同的文件： main.py ， vector.py ， entity.py和physics.py 。 I will not post all the code, just the imports, because I think that's where the error is (If you want, I can post more).我不會發布所有代碼，只會發佈導入，因爲我認爲這就是錯誤所在（如果您願意，我可以發佈更多）。
main.py:主要.py：
import time
from entity import Ent
from vector import Vect
#the rest just creates an entity and prints the result of movement
entity.py:實體.py：
from vector import Vect
from physics import Physics
class Ent:
#holds vector information and id
def tick(self, dt):
#this is where physics changes the velocity and position vectors
vector.py:矢量.py：
from math import *
class Vect:
#holds i, j, k, and does vector math
physics.py:物理.py：
from entity import Ent
class Physics:
#physics class gets an entity and does physics calculations on it.
I then run from main.py and I get the following error:然後我從main.py運行，我收到以下錯誤：
Traceback (most recent call last): File "main.py", line 2, in <module> from entity import Ent File ".../entity.py", line 5, in <module> from physics import Physics File ".../physics.py", line 2, in <module> from entity import Ent ImportError: cannot import name Ent
I'm guessing that the error is due to importing entity twice, once in main.py , and later in physics.py , but I don't know a workaround.我猜的錯誤是由於進口單位兩次，一次在main.py ，後來在physics.py ，但我不知道一個解決辦法。 Can anyone help?任何人都可以幫忙嗎？
解決方案：
參考一： https://stackoom.com/question/cp0Z參考二： ImportError: Cannot import name X