方法return返回值

class 类名:

    def 方法名(self,arg):

        print(arg)

        return 1

中间人 = 类名()

ret = 中间人.方法名(1)

print(ret)

#!/usr/bin/env python3.8
# -*- coding: UTF-8 -*-
# __author:smoke
# file:object_oriented.py
# time:2021/02/19

class Bar:
    def foo(self,name, age, gender, content):
        print(name, age, gender, content)
        return 1
obj = Bar()


ret = obj.foo('小明','10岁','男','上山去砍柴')
print(ret)
ret = obj.foo('小明','10岁','男','开车去东北')
print(ret)
ret = obj.foo('小明','10岁','男','最爱大保健')
print(ret)

ret = obj.foo('老李','90岁','男','上山去砍柴')
print(ret)
ret = obj.foo('老李','90岁','男','开车去东北')
print(ret)
ret = obj.foo('老李','90岁','男','最爱大保健')
print(ret)

/usr/bin/python3.8 /home/smoke/PycharmProjects/pythonProject/lean_python/object_oriented.py
小明 10岁 男 上山去砍柴
1
小明 10岁 男 开车去东北
1
小明 10岁 男 最爱大保健
1
老李 90岁 男 上山去砍柴
1
老李 90岁 男 开车去东北
1
老李 90岁 男 最爱大保健
1

Process finished with exit code 0

函数编程VS面向对象编程

#第一次

函数编程

#!/usr/bin/env python3.8
# -*- coding: UTF-8 -*-
# __author:smoke
# file:object_oriented.py
# time:2021/02/19

def foo(name,age,gender,content):
    print(name,age,gender,content)

foo('小明','10岁','男','上山去砍柴')
foo('小明','10岁','男','开车去东北')
foo('小明','10岁','男','最爱大保健')

foo('老李','90岁','男','上山去砍柴')
foo('老李','90岁','男','开车去东北')
foo('老李','90岁','男','最爱大保健')

面向对象编程

#!/usr/bin/env python3.8
# -*- coding: UTF-8 -*-
# __author:smoke
# file:object_oriented.py
# time:2021/02/19
 
class Bar:
    def foo(self,name, age, gender, content):
        print(name, age, gender, content)
 
obj = Bar()
 
 
obj.foo('小明','10岁','男','上山去砍柴')
obj.foo('小明','10岁','男','开车去东北')
obj.foo('小明','10岁','男','最爱大保健')
 
obj.foo('老李','90岁','男','上山去砍柴')
obj.foo('老李','90岁','男','开车去东北')
obj.foo('老李','90岁','男','最爱大保健')

# self

self代指，调用方法的对象（中间人）

 

字符串

s1 = ""

s1 = str()    #str其实是个类

s1.upper()    #upper是str类中的方法

#!/usr/bin/env python3.8
# -*- coding: UTF-8 -*-
# __author:smoke
# file:object_oriented.py
# time:2021/02/19

class Bar:
    def foo(self,arg):
        print(self,arg)

z1 = Bar()
print(z1)

/usr/bin/python3.8 /home/smoke/PycharmProjects/pythonProject/lean_python/object_oriented.py
<__main__.Bar object at 0x7f075449f3d0>

Process finished with exit code 0

#!/usr/bin/env python3.8
# -*- coding: UTF-8 -*-
# __author:smoke
# file:object_oriented.py
# time:2021/02/19

class Bar:
    def foo(self,arg):
        print(self,arg)

z1 = Bar()
print(z1)
z1.foo(111)

/usr/bin/python3.8 /home/smoke/PycharmProjects/pythonProject/lean_python/object_oriented.py
<__main__.Bar object at 0x7f09712973d0>
<__main__.Bar object at 0x7f09712973d0> 111

Process finished with exit code 0

#!/usr/bin/env python3.8
# -*- coding: UTF-8 -*-
# __author:smoke
# file:object_oriented.py
# time:2021/02/19

class Bar:
    def foo(self,arg):
        print(self,arg)

z1 = Bar()
print(z1)
z1.foo(111)
print('======================================')
z2 = Bar()
print(z2)
z2.foo(666)

/usr/bin/python3.8 /home/smoke/PycharmProjects/pythonProject/lean_python/object_oriented.py
<__main__.Bar object at 0x7f0e743663d0>
<__main__.Bar object at 0x7f0e743663d0> 111
======================================
<__main__.Bar object at 0x7f0e7439c550>
<__main__.Bar object at 0x7f0e7439c550> 666

Process finished with exit code 0

给self中间人传参数

#!/usr/bin/env python3.8
# -*- coding: UTF-8 -*-
# __author:smoke
# file:object_oriented.py
# time:2021/02/19

class Bar:
    def foo(self,arg):
        print(self,self.name,arg)

z = Bar()
z.name = 'smoke'
z.foo(666)

/usr/bin/python3.8 /home/smoke/PycharmProjects/pythonProject/lean_python/object_oriented.py
<__main__.Bar object at 0x7f60a043d3d0> smoke 666

Process finished with exit code 0

#!/usr/bin/env python3.8
# -*- coding: UTF-8 -*-
# __author:smoke
# file:object_oriented.py
# time:2021/02/19

class Bar:
    def foo(self,arg):
        print(self,self.name,self.age,self.gender,arg)

z = Bar()
z.name = 'smoke'
z.age = 84
z.gender = 'zhong'
z.foo(666)

/usr/bin/python3.8 /home/smoke/PycharmProjects/pythonProject/lean_python/object_oriented.py
<__main__.Bar object at 0x7f080904f3d0> smoke 84 zhong 666

Process finished with exit code 0

#!/usr/bin/env python3.8
# -*- coding: UTF-8 -*-
# __author:smoke
# file:object_oriented.py
# time:2021/02/19

class Bar:
    def foo(self,arg):
        print(self,self.name,self.age,self.gender,arg)

z = Bar()
z.name = 'smoke'
z.age = 84
z.gender = 'zhong'
z.foo(666)

z1 = Bar()
z1.name = 'cherry'
z1.age = 73
z1.gender = 'nv'
z1.foo(666)

/usr/bin/python3.8 /home/smoke/PycharmProjects/pythonProject/lean_python/object_oriented.py
<__main__.Bar object at 0x7fa2fb6123d0> smoke 84 zhong 666
<__main__.Bar object at 0x7fa2fb648550> cherry 73 nv 666

Process finished with exit code 0