python3.5入門

# -*- coding: utf-8 -*-

from functools import reduce
def greet(name):
    print("hello,"+name+"!")
    greet2(name)
    print("getting ready to say bye.")
    bye()
    
def greet2(name):
    print("how are you "+name+"?")
def bye():
    print("ok bye.")

#階乘
def fact(x):
    if x==1:
        return 1
    else:
        return x*fact(x-1)
print(fact(3))
greet("jiawy")
#快排
def quicksort(array):
    if len(array)<2:
        return array
    else:
        pivot=array[0]
        less=[i for i in array[1:] if i<=pivot]
        greater =[i for i in array[1:] if i>pivot]
        return quicksort(less)+[pivot]+quicksort(greater)
    
print(quicksort([10,5,2,3]))
#哈希表
phone_book=dict()
phone_book={}
phone_book["jenny"]=8675309
phone_book["emergency"]=911
print(phone_book["jenny"])

#投票
voted={}
value =voted.get("tom")
def check_voter(name):
    if voted.get(name):
        print ("kick them out")
    else:
        voted[name]=True
        print("let them out")
        
check_voter("tom")


arr1=[1,2,3,4,5]
print(reduce(lambda x,y:x+y,arr1))