Python 从另一个文件导入类
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Importing class from another file
提问by kemis
Before you mark it as duplicateplease read my problem:
在将其标记为重复之前，请阅读我的问题：
I am trying to import a class from a file from a subdirectory
我正在尝试从子目录的文件中导入一个类
> main.py
> --->folder/
> ----->file.py
and in file.pyi have a class imlpemented ( Klasa)
What have I tried:
并且在file.py我有一个班级实施（Klasa）我试过什么：
putting in main.py:
放入main.py：
from folder import file
from file import Klasa
I am getting the error:
我收到错误：
from file import Klasa
ImportError: No module named 'file'
从文件导入 Klasa
导入错误：没有名为“文件”的模块
When I try to use just:
当我尝试仅使用：
from folder import file
I get this error:
我收到此错误：
tmp = Klasa()
NameError: name 'Klasa' is not defined
tmp = Klasa()
NameError：未定义名称“Klasa”
I have put an empty __init__.pyin the subfolder and it still does not work, and I have put in the __init__.py: from file import Klasaand still doesnt work.
我__init__.py在子文件夹中放了一个空的，但它仍然不起作用，我已经放入了__init__.py：from file import Klasa但仍然不起作用。
If main and file are in the same folder this work:
如果 main 和 file 在同一文件夹中，则此工作：
from file import Klasa
from file import Klasa
but i want them to be in separate files.
但我希望它们在单独的文件中。
Can someone tell me what i am doing wrong?
有人能告诉我我做错了什么吗？
回答by Right leg
Your problem is basically that you never specified the right path to the file.
您的问题基本上是您从未指定文件的正确路径。
Try instead, from your main script:
相反，从您的主脚本尝试：
from folder.file import Klasa
Or, with from folder import file:
或者，使用from folder import file：
from folder import file
k = file.Klasa()
Or again:
或者再次：
import folder.file as myModule
k = myModule.Klasa()
