面向对象编程,类,def函数。 参考:
class Oldboy: 定义类
def fetch(self,backend):
print(backend)
def add_record(self,backend,record):
pass
#创建对象
ret = Oldboy()
ret.fetch("www.xxx.com") ret.add_record("www.xxx.com","www.ooo.com") #这个不执行 #输出结果 www.xxx.com
class OldBoy:
def __init__(self,bk): #bk是形参,对应外部穿过来的实参
'''
构造方法
:return: bk
'''
self.backend = bk #self.backend = bk相当于在__init__中bk的参数
def fetch(self):
print('fetch中self的内存地址:',self)
return self.backend #backend用来接收init方法中bk的参数
def add_record(self,record):
print('add_record中self的内存地址:',self)
return self.backend + record
obj = OldBoy("www.oldboy.org") #创建了一个对象obj,然后把www.oldboy.org封装到类中对应的形参bk
# obj.backend = "www.oldboy.org"
print('obj对象的内存地址:',obj)
ret = obj.fetch()
print(ret)
obj2 = OldBoy(2)
# obj2.backend = 2
print('obj2对象的内存地址:',obj2)
ret = obj2.add_record(3)
print(ret)
class Abcd: #父类
def chi(self):
print(self,name +"吃" )
def he(self):
print(self,name + "喝")
class Dog(Abcd): #继承父类
def __init__(self,name):
sela.name = name
def jiao(self):
print(self.name + "汪")
ret = Dog("小黑")
ret.chi()
ret.he()
ret.jiao()
#执行结果
小黑 吃
小黑 喝
小黑 汪
#多个继承
class Abcd(object):
def f1(self):
print("Abcd")
class A(Abcd):
def f(self):
print("A")
class B(Abcd):
def f1(self):
print("B")
class C(A):
def f(self):
print("C")
class D(B):
def f1(self):
print("D")
class E(C,D):
def f(self):
print("E")
ret = E()
ret.f1()
#执行结果
D