{"id":1562,"date":"2014-11-09T13:05:39","date_gmt":"2014-11-09T13:05:39","guid":{"rendered":"http:\/\/ixyzero.com\/blog\/?p=1562"},"modified":"2014-11-09T13:05:39","modified_gmt":"2014-11-09T13:05:39","slug":"python%e7%9a%84locals%e4%b8%8eglobals","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/1562.html","title":{"rendered":"Python\u7684locals()\u4e0eglobals()"},"content":{"rendered":"

locals()<\/strong>\u548c<\/strong>globals()<\/strong>\u5728\u4f5c\u7528\u57df\u4e0a\u7684\u533a\u522b<\/strong><\/p>\n

\u6b63\u5982\u5b83\u4eec\u7684\u547d\u540d\uff0clocals()\u8fd4\u56de\u7684\u662f\u5c40\u90e8\u53d8\u91cf\uff0cglobals()\u8fd4\u56de\u7684\u662f\u5168\u5c40\u53d8\u91cf\u3002<\/p>\n

\u8fd9\u4e2a\u5dee\u5f02\u5728\u51fd\u6570\u4e2d\u5c31\u6bd4\u8f83\u5bb9\u6613\u53d1\u73b0\u4e86\uff0c\u5efa\u8bae\u81ea\u5df1\u7f16\u5199\u51fd\u6570\u8bd5\u8bd5\uff1a<\/p>\n

>>> def a():\n...     b=1\n...     print locals(), globals()\n...\n>>> a()\n{'b': 1} {'__builtins__': <module '__builtin__' (built-in)>, '__name__': '__main__', '__doc__': None, 'a': <function a at 0x01A8A6B0>, '__package__': None}<\/pre>\n
 <\/p>\n
locals()<\/strong>\u548c<\/strong>globals()<\/strong>\u5728\u8bbf\u95ee\u6027\u4e0a\u7684\u533a\u522b<\/strong><\/p>\n
\u6211\u4eec\u5148\u6765\u770b\u4e00\u6bb5\u7b80\u5355\u7684\u811a\u672c\u5427\uff1a<\/p>\n
>>> a=1\n>>> b=globals()\n>>> print globals()\n{'a': 1, 'b': {...}, '__builtins__': <module '__builtin__' (built-in)>, '__package__': None, '__name__': '__main__', '__doc__': None}\n>>> a=2\n>>> print b\n{'a': 2, 'b': {...}, '__builtins__': <module '__builtin__' (built-in)>, '__package__': None, '__name__': '__main__', '__doc__': None}\n>>> b['a']=3\n>>> print globals()\n{'a': 3, 'b': {...}, '__builtins__': <module '__builtin__' (built-in)>, '__package__': None, '__name__': '__main__', '__doc__': None}\n>>> print a<\/pre>\n
\u53ef\u4ee5\u770b\u51faglobals()\u8fd4\u56de\u7684\u662f\u5f53\u524d\u5168\u5c40\u53d8\u91cf\u7684\u5f15\u7528, \u800c\u4e14\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539b[‘a’]\u6765\u6539\u53d8\u53d8\u91cfa\u7684\u503c.<\/p>\n
\u6240\u4ee5globals()<\/strong>\u7684\u8fd4\u56de\u503c\u662f\u53ef\u8bfb\u53ef\u5199\u7684\u3002<\/strong><\/p>\n
\u8ba9\u6211\u4eec\u518d\u6765\u770b\u4e00\u6bb5\u811a\u672c\uff1a<\/p>\n
>>> def a():\n...     b=1\n...     c=locals()\n...     print c\n...     b=2\n...     print locals()\n...     print c\n...     c['b']=3\n...     print locals()\n...     print b\n...     locals()['b']=3\n...     print locals()\n...     print b\n...     print c\n...\n>>> a()\n{'b': 1}\n{'c': {...}, 'b': 2}\n{'c': {...}, 'b': 2}\n{'c': {...}, 'b': 2}\n{'c': {...}, 'b': 2}\n{'c': {...}, 'b': 2}<\/pre>\n
\u5728locals()\u4e2d\u8bd5\u56fe\u4fee\u6539b\u7684\u503c\uff0c\u5931\u8d25\u4e86\u3002<\/p>\n
\u5728locals()\u7684\u5f15\u7528\u53d8\u91cfc\u4e2d\u4fee\u6539b\u7684\u503c\uff0c\u5931\u8d25\u4e86\u3002<\/p>\n
\u53ef\u89c1locals()<\/strong>\u867d\u7136\u8fd4\u56de\u7684\u548c<\/strong>globals()<\/strong>\u4e00\u6837\u90fd\u662f\u5b57\u5178<\/strong>\uff0c<\/strong>\u4f46\u5176\u8bbf\u95ee\u6027\u662f\u4e0d\u540c\u7684\u3002<\/strong><\/p>\n
globals()<\/strong>\u53ef\u4ee5\u76f4\u63a5\u4fee\u6539\u5176\u4e2d\u5bf9\u5e94\u952e\u7684\u503c<\/strong>\uff0c<\/strong>\u800c<\/strong>locals()<\/strong>\u505a\u4e0d\u5230\u3002<\/strong><\/p>\n
 <\/p>\n
Python locals()\u4e0eglobals()\u7684\u533a\u522b<\/h6>\n