Python2.7：测试内部类型及type和isinstance用法区别

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# -*- coding: UTF-8 -*-class test1:    passclass test2(test1):    passif __name__=="__main__":        #判断类型    a=123  #int    print type(a)    a=123.1 #float    print type(a)    a=test1() # test1    print type(a)    a=test2() #test2    print type(a)    a='string' #str    print type(a)    a=True #bool    print type(a)    a=['item'] #list    print type(a)    a=('item',) #tuple array    print type(a)    a={'item':132} #dict    print type(a)        # type比较类型    a=123  #int    print type(a) is int    print type(a) == int    a=123.1 #float    print type(a) == float    a=test1() # test1    b=test2() #test2    print type(a) == type(b)    print a == type(b) #false    print a is type(b) #false    print a == b       #false    print type(a) is test1 #false    print type(b) is test2 #false    print type(a) is test2 #false    print type(b) is test1 #false    a='string' #str    print type(a) == str    a=True #bool    print type(a) == bool    a=['item'] #list    print type(a) == list    a=('item',) #tuple     print type(a) == tuple    a={'key':132} #dict    print type(a) == dict        # isinstance比较类型    a=123  #int    print isinstance(a, int)    a=123.1 #float    print isinstance(a, float)    #print isinstance(test1(), test2()) #TypeError: isinstance() arg 2 must be a class, type, or tuple of classes and types    print isinstance(test1(), type(test2()))    print isinstance(test1(), test1)    print isinstance(test2(), test2)    print isinstance(test2(), test1)    print isinstance(test1(), test2)  #false    print isinstance(test2(), test1)    a='string' #str    print isinstance(a, str)    a=True #bool    print isinstance(a, bool)    a=['item'] #list    print isinstance(a, list)    a=('item',) #tuple     print isinstance(a, tuple)    a={'key':132} #dict    print isinstance(a, dict)

输出：

<type 'int'><type 'float'><type 'instance'><type 'instance'><type 'str'><type 'bool'><type 'list'><type 'tuple'><type 'dict'>TrueTrueTrueTrueFalseFalseFalseFalseFalseFalseFalseTrueTrueTrueTrueTrueTrueTrueTrueTrueTrueTrueFalseTrueTrueTrueTrueTrueTrue请按任意键继续. . .

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