python笔记-cmp、type、isinstance
示例：IDLE 2.6.4rc2
>>> type(4)
<type 'int'>
>>> cmp(3,2)
1
>>> cmp(20,30)
-1
>>> str(564.5154)
'564.5154'
>>> repr()
''
>>> isinstance('iioo',(str))
True
>>> isinstance(32434,(int))
True
>>> isinstance('safasdf',(int,long))
False
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