what's the difference between two Python imports

Python has two ways to import something from a module:

from mymodule import ClassOne, ClassTwo, ClassThree

and

from mymodule import (ClassOne, ClassTwo, ClassThree)

I cannot find any note (probably开发者_如何学运维, I'm just not trying hard enough) on this in Python's documentation. I want to know the significant difference between these two ways of importing.

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If you put the items to import between brackets, you can use more than one line for everything you want to import, without escaping newlines.