Python在同一包中的文件__init__.py中导入类 [英] Python Import class in __init__.py from file in same package

问题描述

我觉得我应该知道这一点，只要我有Python编程，但我不断学习关于精细语言的新东西。我有这个问题（可能很复杂，但我找不到同样的情况）就是这个问题。我有这样的文件布局：

I feel like I should know this, having programmed in Python for as long as I have, but I'm constantly learning new things about the fine lanuaguge. The question I have (which may very well be a duplicate, however I haven't been able to find this same case) is this. I have a file layout like this:

websocket/
    __init__.py
    client.py
    server.py

如何导入文件中的类__init __。py 来自 client.py 或 server.py ？很好，很简单：P提前谢谢！我的问题不是这个的重复，因为我是从包内导入的，无论如何，做人们在答案中所做的事并没有帮助所有。

How can I import classes that are in the file __init__.py from client.py or server.py? Nice and simple :P Thanks in advance! My question isn't a duplicate of this because I am importing from inside the package, and at any rate, doing what the people did in the answer did not help at all.

推荐答案

在包 __ init __。py 文件中定义的名称是在包名称空间本身中作为名称提供。

Names defined in a package __init__.py file are available as names in the package namespace itself.

因此，如果您的<$ c中有 Connection 类$ c> __ init __ 包，从包装内部导入它的方式与使用包装的方式相同：按包装名称引用，如

Therefore, if you have a Connection class in your __init__ package, from inside the package you do import it the same way one making use of your package would: refer to it by the package name as in

from websocket import Connection

如果是某些原因你的包没有在你的pythonpath中配置，或你的目录名可以改变你可以使用相对导入 - 在这种情况下，请参考当前包，就像。那样意味着在 client.py 中你可以这样做：

If for some reason your package is not configured in your pythonpath, or your directory name can change you can use a relative import - in tha case, refer to the current package just as . that means that in your client.py you can just do:

from . import Connection

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