import modx和modx import *有什么区别？ [英] What is the difference between import modx and from modx import *?

问题描述

如果我要导入一些名为modx的模块，那么与modx import * $ b的说法有什么不同？

If I were to import some module called modx, how would that be different from saying

from modx import *

不是所有内容都是从每种方式导入的吗？这只是为了澄清。

Wouldn't all the contents be imported from each either way? This is in python just to clarify.

推荐答案

如果你导入somemodule 包含的全局变量将通过 somemodule.someglobal 提供。如果你从somemodule import * 所有的全局变量（或 __ all __ 中列出的那些全局变量）将成为全局变量，即你可以使用 someglobal 访问它们，而不需要前面的模块名称。

If you import somemodule the contained globals will be available via somemodule.someglobal. If you from somemodule import * ALL its globals (or those listed in __all__ if it exists) will be made globals, i.e. you can access them using someglobal without the module name in front of it.

使用不推荐使用模块导入* ，因为它会使全局范围变得混乱，如果从多个模块导入内容，则可能会发生冲突并覆盖现有的类/函数。

Using from module import * is discouraged as it clutters the global scope and if you import stuff from multiple modules you are likely to get conflicts and overwrite existing classes/functions.

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