高阶函数

函数实质是一个变量,fun -> 内存空间； func1 = fun； func1()
高阶函数:可以接受函数作为参数，或者把函数作为返回值的函数;

def fun1(var):
return var

def fun1(fun2):
…..
return fun2

In [1]: abs(-1)Out[1]: 1In [2]: a(-1)---------------------------------------------------------------------------NameError                                 Traceback (most recent call last)<ipython-input-2-c976f5e459ea> in <module>()----> 1 a(-1)NameError: name 'a' is not definedIn [3]: a = absIn [4]: a(-1)Out[4]: 1

面向对象编程

• 面向过程编程:
• 面向对象编程（OOP) Object Oriented Programming
• 面向函数编程:(lisp)

(13+10)*2-10
a = 13+10
b = a*2
c = b-10

result = jian(multi(add(13,10),2),10)

CS:
role:警察，恐怖分子,人质

role1

name = “lee”
role = “警察”
waepon=”匕首”
life_value = 100
money=16000

role2

name = “harry”
role=”恐怖分子”
wepon=”AK47”
life_value = 100
money=16000

role3

name = “maria”
role=”人质”
life_value = 100

def shot(user):
pass

class Police:
def get_info(self,name,role,life_value,weapon,money):
self.name = name
self.role = name

def shot():    passdef rescue():    pass

class Kongbu:
def shot():
pass
def kill():
pass

class Renzhi:
def get_info():
pass

gaowenrui = Police()
tanghao = Kongbu()
zhoumengyang = Renzhi()

什么是面向对象?

类 ===== 建房子的图纸 (三室一厅，两室一厅…….)
对象===== 实际建出来的房子(门牌号)

class ThreeRoom:
pass

seven_zero_one = ThreeRoom()
seven_zero_one.live()
seven_zero_one.clean()
面向对象的三个特性:封装，继承，多态