Python：从1级以上导入(Python: importing from 1+ levels down)

Python：从1级以上导入(Python: importing from 1+ levels down)

假设我使用不必要的长路径导入：

from pandas.core.series import Series

更常见的导入是：

from pandas import Series

我可以通过以下方式查看完整路径：

Series Out[6]: pandas.core.series.Series

这是我困惑的根源。 在顶级__init__模块中没有任何地方可以from core import * （或core.series ） from core import *任何内容。 .core的__init__模块也是空的。

是什么使我能够简单地使用from pandas import Series而不是完整路径，或者更一般地说，导入一个“几级降低”的模块，函数，变量或类？

Say that I import with the unnecessarily long full path:

from pandas.core.series import Series

The more common import is simply:

from pandas import Series

to which I can view the full path with:

Series Out[6]: pandas.core.series.Series

Here is the source of my confusion. Nowhere in the top-level __init__ module is there any import of from core import * (or core.series, for that matter). The __init__ module for .core is empty also.

What enables me to be able to use simply from pandas import Series rather than the full path or, more generally, to import a module, function, variable, or class that is "several levels down"?

最满意答案

你有__init__.py文件内 ：

from pandas.core.api import *

其中导入Series 。

You have inside the __init__.py file:

from pandas.core.api import *

in which Series is imported.