python 判断数据类型

发布时间：2019-06-21 17:36:01编辑：auto阅读（2307）

    1. import types  


    3. aaa = 0

    4. print type(aaa)  

    5. if type(aaa) is types.IntType:  

    6.    print "the type of aaa is int"  

    7. if isinstance(aaa,int):  

    8.    print "the type of aaa is int"  


    10. bbb = 'hello'

    11. print type(bbb)  

    12. if type(bbb) is types.StringType:  

    13.    print "the type of bbb is string"  

    14. if isinstance(bbb,str):  

    15.    print "the type of bbb is string"  


    17. #if the type is NoneType,the isinstance does not work  

    18. #we should judge the NoneType like below  

    19. #if row is None  

    20. #if type(row) is types.NoneType  


    22. #In my opinion,use the types to judge the type of a param is convinient<SPANstyle="BACKGROUND-COLOR: rgb(255,255,255); FONT-FAMILY: Arial">, use the isinstance to judge whether a instance is a type of a class or not</SPAN>


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