从兄弟目录导入

Question

I have searched this question over stackoverflow but can't find an answer that fixes this. I am trying to learn how to do proper imports with python.

I am using Python 3.8.2 and I have the following simple directory setup.

main_folder\
    folder1\
        myclass.py
    folder2\
        testclass2.py
    testclass1.py

Both testclass1.py and testclass2.py have this inside:

from folder1.myclass import Myclass

This works fine for testclass1.py, but when I run in testclass2.py it gives me an error.

ModuleNotFoundError: No module named 'folder1'

Even though I had read Python no longer requires this, I inserted an __init__.py file into folder1. This generated the same error. I then tried following directions for the init file in this article but there was no improvement. I also tried using relative paths versus absolute paths for import, but no success.

Help is much appreciated.

Answer 1

从testclass2.py导入应该是这样的：

from ..folder1.myclass import Myclass