设计一个抽奖服务
背景：有x个奖品，要求在y天内发完；每天至少发放z个奖品；每天抽奖人数不定，事先会假设一个范围是m-n
举例：有100个奖品，要求5天内发完，每天至少发15个奖品；每天来抽奖的人估计是 2000-3000 人，希望奖品能够比较均匀，但随机的抽取出来。
接口要求：服务监听一个端口，测试程序不断连接，发送一个数字代表是第几天，比如第1-2000个请求发送1（模拟第一天来了2000人），第2001到5000请求发送2（模拟第二天来了3000人）... 服务返回 0 or 1 表示是否抽到奖品
client.py:设置初始化参数，模拟用户向server端发送数据
# -*- coding: utf-8 -*-
import socket
import random
address = ('127.0.0.1', 31500)
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
x = int(input("奖品个数x："))
y = int(input("发放天数y："))
z = int(input("每天至少发放奖品个数："))
m = int(input("最少人数m："))
n = int(input("最多人数n："))
data = '{"x":'+str(x)+',"y":+'+str(y)+',"z":'+str(z)+',"m":'+str(m)+',"n":'+str(n)+'}'
s.sendto(data.encode('utf-8'), address)
for day in range(y):
num = random.randint(m, n)
print("第",day+1,"天人数为",num)
k=0
for k in range(num):
s.sendto(str(day+1).encode('utf-8'), address)
s.close()
server.py:服务端接收初始数据和每个用户发送的数据
# -*- coding: utf-8 -*-
import socket
import lottery
address = ('127.0.0.1', 31500)
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind(address)
list=[]
data, addr = s.recvfrom(2048)
data = data.decode('utf-8')
print ("received:", data, "from", addr)
dic=eval(data)
x=dic['x']
y=dic['y']
z=dic['z']
m=dic['m']
n=dic['n']
k=0
preday = 1
while True:
k += 1
day, addr = s.recvfrom(2048)
if not day:
print ("client has exist")
break
if preday != day:
list.append(k-1)
preday = day
day = int(day.decode('utf-8'))
x -= lottery.check(x,y,z,m,n,k,day,list)
s.close()
lottery.py:抽奖程序算法
#Filename:lottery.py
def check(x,y,z,m,n,k,day,list):
#估计到来当天的人数和奖品的个数
if day == 1 or day == y:
e_x = z
e_people = n
elif day == y:
e_x = x
e_people = n
else:
e_x = x/(y+1-day)
e_people = sum(list)/len(list)
#中奖间隔
length = int(e_people/e_x)
lucky = 0
if x>0 and k%length == 0 :
#print(x,"第",k,"个中奖")
lucky = 1
print("第",k,"个--第",day,"天--是否中奖--",lucky)
return lucky
源码下载：python实现抽奖小程序
想要学习更多关于抽奖功能的实现，请参考此专题：抽奖功能
