• • 此问题在此处已有答案**：

Running unittest with typical test directory structure（24个答案）
9小时前关门了。
我在python包中遇到了一个奇怪的问题，我有一个名为manchinetranslator的python包，我在其中创建了一个单元测试的子文件夹，如下所示。

manchinetranslator/translator.py
manchinetranslator/__init__.py
manchinetranslator/tests/tests.py

在www.example.com中，两个函数定义如下：translator.py, two functions are defined as:

def english_to_french(text):
...
def french_to_english(text):
...

• • 初始化**. py为：

from . import translator
www.example.com包含www.example.com中两个函数的单元测试，如下所示： tests.py contains unit tests of the two functions in translator.py and is as follows:

import unittest
from translator import english_to_french, french_to_english
class Test_english_to_french(unittest.TestCase):
...   
class Test_french_to_english(unittest.TestCase):
...

但在运行www.example.com时，它会给出如下错误：tests.py, it gives an error as follows:

Traceback (most recent call last):
  File "C:\Python\manchinetranslator\tests\tests.py", line 3, in <module>
    from manchinetranslator.translator import english_to_french, french_to_english
ModuleNotFoundError: No module named 'manchinetranslator'

但是，当www.example.com与www.example.com放在同一个文件夹中时，它工作正常。我猜它可能需要设置$PYTHONPATH，但我不确定如何设置。因此，我需要帮助来解决这个问题。 tests.py is put in the same folder as translator.py , it works fine. I guess it may need to set $PYTHONPATH, but I am not sure how to do it. So I need help with this problem.