1 import types 2  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" 9 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"16 17 #if the type is NoneType,the isinstance does not work18 #we should judge the NoneType like below19 #if row is None20 #if type(row) is types.NoneType21 22 #In my opinion,use the types to judge the type of a param is convinient<span style="font-family:Arial;background-color: rgb(255, 255, 255);">, use the isinstance to judge whether a instance is a type of a class or not</span>