######判断输入###
#!/usr/bin/env python
#coding:utf-8
_author_ = 'hxr'
def myabs(x):
if isinstance(x,(int,float)):
print abs(x)
else:
print "请输入数字"
myabs('123')
######将姓名首字母变为大写######
#!/usr/bin/env python
#coding:utf-8
_author_ = 'hxr'
def func(name):
if name.istitle():
print name
else:
print name.capitalize()
name=raw_input("输入姓名:")
func(name)
#####运用字典判断四则运算####
#!/usr/bin/env python
#coding:utf-8
from __future__ import division
_author_ = 'hxr'
def add(num1,num2):
return num1+num2
def sub(num1,num2):
return num1-num2
def chen(num1,num2):
return num1*num2
def chu(num1,num2):
return num1/num2
num1=input("请输入一个数字")
num2=input("请输入一个数字")
dic={'+':add(num1,num2),'-':sub(num1,num2),'*':chen(num1,num2),'/':chu(num1,num2)}
choice=raw_input("请输入运算方法:")
if choice in dic.keys():
print dic[choice]
else:
print "当前操作不存在！"
#####返回两个值（相当于返回元组）######
#!/usr/bin/env python
#coding:utf-8
_author_ = 'hxr'
def func(x,y):
if not isinstance(x,int)or not isinstance(y,int):
print 'Error type'
else:
return max(x,y),(x+y)/2
x=input("请输入一个数")
y=input("请输入一个数")
maxi,ave=func(x,y)
print "最大为：%s"%maxi
print "平均为：%s"%ave
######参数为列表#############
#默认参数必须是不可变数据类型
def func1(li=None):
if li is None:
return ['END']
else:
li.append('END')
return li
def func(li=[]):
if len(li)==0:
return ['END']
else:
li.append('END')
return li
print func([1,2,3])
print func()
print func()
########可变参数/位置参数#####
#定义函数时，形参可以为*args，使函数可以接受多个参数
#如果想将一个列表或元组传入函数，也可以通过*li或*t将参数传入函数里
def fun(*args):
print type(args)
return max(args),min(args)
li=1,42,3,14,58,6
print fun(*li)
###########关键字参数####
def enroll(name,age=22,**kwargs):
print 'name:'+name
print 'age:%d'% age
for k,w in kwargs.items():
print '%s : %s'%(k,w)
print type(kwargs)
enroll('hello',myclass='运维班',gender='male')
####
#####递归函数求阶乘#####
#!/usr/bin/env python
#coding:utf-8
_author_ = 'hxr'
def fact(n):
if n == 1:
return 1;
else:
return fact(n - 1) * n
num = input("请输入一个数字：")
print fact(num)
######除数的一半########
#!/usr/bin/env python
#coding:utf-8
_author_ = 'hxr'
def fun(n):
if not isinstance(n,int):
print "num is not int"
exit (0)
print n
b=int (n/2)
if b >0:
return fun(b)
num = input("请输入一个数字：")
fun(10)
########求数的平方########
#!/usr/bin/env python
#coding:utf-8
_author_ = 'hxr'
li=[]
for i in range(1,8,1):
li.append(i*i)
print li
list=[]
for i in range(1,8,1):
s="%s x %s"%(i,i)
list.append(s)
print list
########列表生成式（可以嵌套语句）#####
#!/usr/bin/env python
# coding:utf-8
li=[]
str1='123'
str2='ABC'
for i in str1:
for j in str2:
li.append(i+j)
print li
print[i+j for i in str1 for j in str2]
#######斐波那挈数列#####
#!/usr/bin/env python
# coding:utf-8
def fib(max):
n,a,b=0,0,1
while n<max:
print b
a,b=b, a+b
n+=1
fib(7)
#######生成器######
def hello():
print 'a'
yield 1
print 'b'
yield 2
print 'c'
yield 3
a=hello()
a.next()
a.next()
a.next()
########异步I/O模型########
#!/usr/bin/env python
# coding:utf-8
import time
def consumer(name):
print '%s 准备好了！'%name
while True:
fentiao =yield
print ('%s做好了，%s已经结束了')%(fentiao,name)
def product(name):
c1=consumer("hello1")
c2=consumer("hello2")
c1.next()
c2.next()
print "开始制作了......."
for i in 'hen':
time.sleep(1)
print '%s做了两份'%name
c1.send(i)
c2.send(i)
product('小明')
#########字符串转int类型#######
#!/usr/bin/env python
# coding:utf-8
str1='12345'
def char2int(x):
li = {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9}
return li[x]
res= map(char2int,str1)
def func(x,y):
return x*10+y
print type(reduce(func,res))
########过滤输出1-10中的所有质数#####
#!/usr/bin/env python
# coding:utf-8
def zhi(x):
if x==1:
return None
for i in range(2,x+1):
if x%i==0:
break
if i==x:
return x
else:
return None
print filter(zhi,range(1,10))
