在 wsgi 中导入 python 模块时出现 500 内部服务器错误

我有一个 Python 脚本，它使用 PEST wsgi 库异步执行函数.但是，当我尝试导入另一个模块时，它只会导致 500 错误.

I've got a Python script that is executing functions asynchronously by using PEST wsgi library. However, when I try to import another module it simply results in a 500 error.

我尝试引用它的方式是:

The way I try to reference it is:

from foo import * 
from foo import Foo

其中 foo 是一个文件 .py，我在其中拥有要引用的对象.

where foo is a file .py in which I have the object that I want to reference to.

尝试通过 Chrome 的 Inspect Element Control 监控调用，但找不到任何东西.

Tried to monitor the calls through Chrome's Inspect Element Control but couldn't find a thing.

还尝试使用 Apache 的错误日志进行调试，但没有任何结果.
任何提示表示赞赏.

Also tried to debug using Apache's error log, but nothing there.
Any hints appreciated.

更新:我尝试了以下导致相同 500 错误的方法:

Update: I've tried the following which resulted in the same 500 error:

--利用

import site 

和

site.addsitedir("path/to/my/py/files/folder")

--通过插入以下内容来修改 Apache2 httpd.conf 文件:

--modify the Apache2 httpd.conf file by inserting the following:

WSGIPythonPath /path/to/my/py/files/folder

--修改/etc/apache2/sites-available/myapp.conf中的应用conf文件，插入上面的WSGIPythonPath

--modify the application conf file in /etc/apache2/sites-available/myapp.conf, by inserting the above WSGIPythonPath