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Python 内置变量

时间:2017-11-29 16:15:33      阅读:202      评论:0      收藏:0      [点我收藏+]

标签:module   var   路径   运行   mod   min   __name__   缓存   spec   

Python 隐藏变量

__doc__  # 表示本文件的注释
__file__ # 表示本文件的路径
__package__ # 导入的py文件所在的文件夹路径
__cached__ # 导入文件的缓存
__name__ #如果是主文件 __name__ = "__main__" 否则等于函数名称
#!/usr/bin/env python
# -*- coding:utf-8 -*-
"""
{
    ‘__builtins__‘: <module ‘builtins‘ (built-in)>, 
    ‘__package__‘: None,
    ‘__cached__‘: None,
    ‘__file__‘: ‘C:/Users/Administrator/PycharmProject/MyProject/myfunc/ceshi.py‘, 
    ‘__doc__‘: None, 
    ‘__name__‘: ‘__main__‘, 
    ‘__loader__‘: <_frozen_importlib_external.SourceFileLoader object at 0x0000026EC5A58978>,
    ‘__spec__‘: None}
"""

if __name__ == ‘__main__‘:
    print(__file__)
    print(__doc__)
    print(vars())
运行结果:
C:/Users/Administrator/PycharmProject/MyProject/myfunc/ceshi.py   # __file__

{   # __doc__
    ‘__builtins__‘: <module ‘builtins‘ (built-in)>, 
    ‘__package__‘: None,
    ‘__cached__‘: None,
    ‘__file__‘: ‘C:/Users/Administrator/PycharmProject/MyProject/myfunc/ceshi.py‘, 
    ‘__doc__‘: None, 
    ‘__name__‘: ‘__main__‘, 
    ‘__loader__‘: <_frozen_importlib_external.SourceFileLoader object at 0x0000026EC5A58978>,
    ‘__spec__‘: None}

# vars() {
‘__cached__‘: None, ‘__package__‘: None, ‘__doc__‘: "\n{\n ‘__builtins__‘: <module ‘builtins‘ (built-in)>, \n ‘__package__‘: None,\n ‘__cached__‘: None,\n ‘__file__‘: ‘C:/Users/Administrator/PycharmProject/MyProject/myfunc/ceshi.py‘, \n ‘__doc__‘: None, \n ‘__name__‘: ‘__main__‘, \n ‘__loader__‘: <_frozen_importlib_external.SourceFileLoader object at 0x0000026EC5A58978>,\n ‘__spec__‘: None}\n", ‘__builtins__‘: <module ‘builtins‘ (built-in)>, ‘__file__‘: ‘C:/Users/Administrator/PycharmProject/MyProject/myfunc/ceshi.py‘, ‘__loader__‘: <_frozen_importlib_external.SourceFileLoader object at 0x000002354BFB8978>, ‘__spec__‘: None, ‘__name__‘: ‘__main__‘}

Python 内置变量

标签:module   var   路径   运行   mod   min   __name__   缓存   spec   

原文地址:http://www.cnblogs.com/ming5218/p/7920602.html

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