网站建设推广浩森宇特,wordpress商城企业,网站建设实践报告绪论,平面设计的素材网站44、class类#xff1a;一、类定义的一般形式#xff1a;1、简单的形式#xff1a;实例化对象没有自己独有的数据属性。 class fistclass():... data1 hello world ### 这是类的数据属性或类成员属性。... def printdata(self): ###这是类的方法#…44、class类一、类定义的一般形式1、简单的形式实例化对象没有自己独有的数据属性。 class fistclass():... data1 hello world ### 这是类的数据属性或类成员属性。... def printdata(self): ###这是类的方法而且这里至少有一个参数self... print(nihao%s %self.data1)... class1 fistclass() ##类实例化 class1.class1.__class__( class1.__format__( class1.__le__( class1.__reduce_ex__( class1.__weakref__class1.__delattr__( class1.__ge__( class1.__lt__( class1.__repr__( class1.data1class1.__dict__ class1.__getattribute__( class1.__module__ class1.__setattr__( class1.printdata(class1.__dir__( class1.__gt__( class1.__ne__( class1.__sizeof__(class1.__doc__ class1.__hash__( class1.__new__( class1.__str__(class1.__eq__( class1.__init__( class1.__reduce__( class1.__subclasshook__( class1.data1 ##类数据属性调用hello world class1.printdata() ##类的方法的调用nihaohello world2、定义对象独有的数据属性 class seclass():... data1 hello seclass... def setdata(self,x):... self.str1 x... def printdata(self):... print(self.str1)... ins1 seclass() ins1.ins1.__class__( ins1.__format__( ins1.__le__( ins1.__reduce_ex__( ins1.__weakref__ins1.__delattr__( ins1.__ge__( ins1.__lt__( ins1.__repr__( ins1.data1ins1.__dict__ ins1.__getattribute__( ins1.__module__ ins1.__setattr__( ins1.printdata(ins1.__dir__( ins1.__gt__( ins1.__ne__( ins1.__sizeof__( ins1.setdata(ins1.__doc__ ins1.__hash__( ins1.__new__( ins1.__str__(ins1.__eq__( ins1.__init__( ins1.__reduce__( ins1.__subclasshook__( ins1.data1hello seclass ins1.setdata(abc) ins1.printdata()abc ins2 seclass() ins2.data1hello seclass ins2.setdata(xy) ins2.printdata()xy3、__init__()方法创建实例时python会自动调用类中的__init__方法以隐性的为实例提供属性。__init__称之为构造器。如果类中没有定义__init__方法则实例之初仅仅是创建一个简单的名称空间。 class thirdclass():... data3 hello thirdclass... def __init__(self,who):... self.name who... ins3 thirdclass(lucy) ins3.ins3.__class__( ins3.__format__( ins3.__le__( ins3.__reduce_ex__( ins3.__weakref__ins3.__delattr__( ins3.__ge__( ins3.__lt__( ins3.__repr__( ins3.data3ins3.__dict__ ins3.__getattribute__( ins3.__module__ ins3.__setattr__( ins3.nameins3.__dir__( ins3.__gt__( ins3.__ne__( ins3.__sizeof__(ins3.__doc__ ins3.__hash__( ins3.__new__( ins3.__str__(ins3.__eq__( ins3.__init__( ins3.__reduce__( ins3.__subclasshook__( ins3.data3hello thirdclass ins3.namelucy4、__dict__: ins3.__dict__ 实例的属性{name: lucy} thirdclass.__dict__ 类的属性。mappingproxy({data3: hello thirdclass, __init__: , __dict__: , __module__: __main__, __doc__: None, __weakref__: })5、类中的可用变量 class c1():... var1 hello c1 ###类的静态变量... def __init__(self,who):... self.insdata who ###实例变量。... self.name 123 ###局部变量只属于这个方法。... ins1 c1(12) ins1.ins1.__class__( ins1.__format__( ins1.__le__( ins1.__reduce_ex__( ins1.__weakref__ins1.__delattr__( ins1.__ge__( ins1.__lt__( ins1.__repr__( ins1.insdatains1.__dict__ ins1.__getattribute__( ins1.__module__ ins1.__setattr__( ins1.nameins1.__dir__( ins1.__gt__( ins1.__ne__( ins1.__sizeof__( ins1.var1ins1.__doc__ ins1.__hash__( ins1.__new__( ins1.__str__(ins1.__eq__( ins1.__init__( ins1.__reduce__( ins1.__subclasshook__( ins1.name123 ins1.var1hello c1 ins1.insdata126、类的继承python允许多重继承属性搜索方法从左往右从下往上。 class PClass(object):... gender male... def __init__(self,who):... self.name who... class CClass(PClass):... def displayinfo(self):... print(self.gender,self.name)... ins1 CClass(lucy) ins1.ins1.__class__( ins1.__format__( ins1.__le__( ins1.__reduce_ex__( ins1.__weakref__ins1.__delattr__( ins1.__ge__( ins1.__lt__( ins1.__repr__( ins1.displayinfo(ins1.__dict__ ins1.__getattribute__( ins1.__module__ ins1.__setattr__( ins1.genderins1.__dir__( ins1.__gt__( ins1.__ne__( ins1.__sizeof__( ins1.nameins1.__doc__ ins1.__hash__( ins1.__new__( ins1.__str__(ins1.__eq__( ins1.__init__( ins1.__reduce__( ins1.__subclasshook__( ins1.gendermale ins1.namelucy ins1.displayinfo()male lucy
