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]: 1

In [2]: a(-1)
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-2-c976f5e459ea> in <module>()
----> 1 a(-1)

NameError: name 'a' is not defined

In [3]: a = abs

In [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)

作业：通过面向对象的方式实现队列和栈的数据结构

class Stact(object):

le=[1,24,5,”asd”]

def

init

(self):

pass

def push(self):

item=raw_input(“请输入你想加如的内容”)

self.le.append(item)

def pop(self):

if self.le==[]:

print “none”

else:

self.le.pop(-1)

return self.le

def stack_top(self):

if not self.le==[]:

print “none”

else:

print self.le[-1]

def length(self):

d=len(self.le)

print d

def info(self):

for i in self.le:

print i

s=Stact()

s.info()

print s.pop()

s.info()

游戏：

pr=”“”

welcome ying xiong lian meng

qin

hu

an

please your role:”“”

changjing=”“”

mojiajiguan

chang ping

wangzhe

shenyuan

huoyanshan

please you choice:”“”

class People(object):

def

init

(self,name,age,sex,value):

self.name=name

self.age=age

self.sex=sex

self.value=value

def moji(self):

    print """
    huan ying lai dao mojia jiguan

    """
    self.value-=100
    return "\t%s,%s,%s,%s"%(self.name,self.age,self.sex,self.value)
def changping(self):
    print """
    huan ying lai dao changping
    """
    self.value-=200
    return "\t%s,%s,%s,%s"%(self.name,self.age,self.sex,self.value)
def wangzhe(self):
    print """
    huan ying lai dao wangzhe
    """
    self.value-=150
    return "\t%s,%s,%s,%s"%(self.name,self.age,self.sex,self.value)
def shenyuan(self):
    print """
    huan ying lai dao shenyuan
    """
    self.value-=300
    return "\t%s,%s,%s,%s"%(self.name,self.age,self.sex,self.value)
def huoyan(self):
    print """
    huan ying lai dao huoyan
    """
    self.value-=500
    return "\t%s,%s,%s,%s"%(self.name,self.age,self.sex,self.value)
# dic={"M":moji,
#      "C":changping,
#       "W":wangzhe,
#      "S":shenyuan,
#      "H":huoyan}

qin = People(“qin”,18,”nan”,1000)

hu=People(“hu”,18,”nv”,2000)

an=People(“an”,18,”an”,2500)

while 1:

choice=raw_input(pr)

if choice==”qin”:

changjing=raw_input(changjing)

if changjing==”mojiajiguan”:

d=qin.moji()

print d

elif changjing==”changping”:

d=qin.changping()

print d

elif changjing==”wangzhe”:

d=qin.wangzhe()

print d

elif changjing==”shenyuan”:

d=qin.shenyuan()

print d

elif changjing==”huoyanshan”:

d=qin.huoyan()

print d

elif choice==”hu”:

changjing=raw_input(changjing)

if changjing==”mojiajiguan”:

d=hu.moji()

print d

elif changjing==”changping”:

d=hu.changping()

print d

elif changjing==”wangzhe”:

d=hu.wangzhe()

print d

elif changjing==”shenyuan”:

d=hu.shenyuan()

print d

elif changjing==”huoyanshan”:

d=hu.huoyan()

print d

elif choice==”an”:

changjing=raw_input(changjing)

if changjing==”mojiajiguan”:

d=an.moji()

print d

elif changjing==”changping”:

d=an.changping()

print d

elif changjing==”wangzhe”:

d=an.wangzhe()

print d

elif changjing==”shenyuan”:

d=an.shenyuan()

print d

elif changjing==”huoyanshan”:

d=an.huoyan()

print d