__format__方法应如何用于int? [英] How is the __format__ method supposed to be used for int?

问题描述

我看到有一个 __ format __ 方法，但是help( int .__ format __ )没有提供任何帮助.

I saw there was a __format__ method but help(int.__format__) doesn't provide any help.

我也知道您不应该直接调用 __ method __ .什么时候调用此方法?它的论点是什么?

I also know you're not suppose to call a __method__ directly. When is this method called? Which is its argument?

推荐答案

它用于Py3k的新字符串格式设置方案.

It's used for Py3k's new string formatting scheme.

您可以在此处找到更多信息:

You can find more info here:

http://docs.python.org/whatsnew/2.6.html#pep-3101-advanced-string-formatting

您是对的，没有直接调用它.可以通过 str.format 或内置的新 format 来调用.

You are right that it isn't called directly. It's called by str.format or the new format builtin.

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