查找所有双下划线变量的列表? [英] Finding a list of all double-underscore variables?

问题描述

相关: Python文件的常见标头格式是什么?

我在哪里可以找到Python中常用的所有双下划线变量/关键字的列表?

在Python中，以双下划线开头和结尾的变量通常用于存储元数据或内置于系统中.例如，

In Python, variables starting and ending with double underscores are typically to store metadata or are built into the system. For example,

#!/usr/bin/env python

__author__ = 'Michael0x2a'
__license__ = 'GPL'

class Test(object):
    def __init__(self):
        print 'Hello World!'

if __name__ == '__main__':
    t = Test()

我敢肯定__author__和__license__是众所周知的.还有哪些其他双下划线元数据变量?我可以在某处查看完整的清单吗?我可以自己制作一个，还是一堆已经成为我应该使用的实际标准?

I'm pretty certain __author__ and __license__ are pretty well known. What other double-underscore metadata variables are there? Is there a comprehensive list I can check somewhere? Can I just make up my own, or are there a bunch of ones that have become de-facto standards that I should use?

__init__，__name__和__doc__之类的东西几乎都内置在Python中.那是仅有的两个保留的双下划线关键字吗?还有吗?我可以在哪里找到清单?

Things like __init__, __name__, and __doc__ are pretty much built into Python. Are those the only two reserved double-underscore keywords? Are there any more? Is there some place I can get a list?

我正在浏览，遇到了另一个问题，该问题链接到

I was browsing and encountered another question that linked to a mindmap of a bunch of double-underscore variables.

推荐答案

如果要查看魔术名称(无论是否有文献记载)，请转到Lib目录并运行:

If you want to see magic names whether documented or not, go to the Lib directory and run:

egrep -oh '__[A-Za-z_][A-Za-z_0-9]*__' *.py | sort | uniq

会产生:

'__all__'
'__args__'
'__author__'
'__bases__'
'__builtin__'
'__builtins__'
'__cached__'
'__call__'
'__class__'
'__copy__'
'__credits__'
'__date__'
'__decimal_context__'
'__deepcopy__'
'__dict__'
'__doc__'
'__exception__'
'__file__'
'__flags__'
'__ge__'
'__getinitargs__'
'__getstate__'
'__gt__'
'__import__'
'__importer__'
'__init__'
'__ispkg__'
'__iter__'
'__le__'
'__len__'
'__loader__'
'__lt__'
'__main__'
'__module__'
'__mro__'
'__name__'
'__package__'
'__path__'
'__pkgdir__'
'__return__'
'__safe_for_unpickling__'
'__setstate__'
'__slots__'
'__temp__'
'__test__'
'__version__'

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