关于预测比赛结果

今天给各位介绍如何用Python编写一段预测比赛结果的代码

以排球比赛为例

首先介绍一下排球比赛的规则

前四场采用25分制，每场比赛只有到某支队伍先取得25分并且比对手至少高三分才算获得本局胜利；

正式比赛采用五局三胜制，最后的决赛局只采用15分制，当其中一队先得满8分以后，双方交换场地，按原位置继续进行比赛

决胜局的优胜条件为先取得15分及15分以上且比对手得分高2分以上的队伍获胜

我设计了如下程序

# -*- coding: utf-8 -*-
"""
Created on Wed May 15 15:43:44 2019

@author: h2446
"""

from random import random
def printIntro():
    print("这个程序模拟两支排球队A和B的排球比赛")
    print("程序运行需要A和B的能力值(以0到1之间的小数表示)")
def getInputs():
    a=eval(input("请输入队伍A的能力值(0~1):"))
    b=eval(input("请输入队伍B的能力值(0~1):"))
    n=eval(input("模拟比赛的场次:"))
    return a,b,n
def simNGames(n,probA,probB):
    winsA,winsB=0,0
    for i in range(n):
        scoreA,scoreB=simOneGame(probA,probB)
        if scoreA>scoreB:
            winsA +=1
        else:
            winsB +=1
        return winsA,winsB
def gameOver(a,b):
        if (a>25 and abs(a-b)>=2 )or(b>25 and abs(a-b)>=2):
            return True
        else:
            return False
def simOneGame(probA,probB):
    scoreA,scoreB=0,0
    serving = "A"
    while not gameOver(scoreA,scoreB):
        if serving =="A":
            if random()<probA:
                scoreA +=1
            else:
                serving="B"
        else:
            if random()<probB:
                scoreB +=1
            else:
                serving="A"
    return scoreA,scoreB
def final(probA,probB):
     winsA,winsB=simNGames1(4,probA,probB)
     printSummary(winsA,winsB)
     if not winsA==3 or winsB==3:
         if winsA==winsB==2:
             winsA1,winsB1=simOneGame1(probA,probB)
             finalprintSummary(winsA,winsB)
     else:
         finalprintSummary(winsA,winsB)
def simNGames1(n,probA,probB):
     winsA,winsB=0,0
     for i in range(n):
         scoreA,scoreB=simOneGame2(probA,probB)
         if winsA==3 or winsB==3:
             break
         if scoreA>scoreB:
             winsA+=1
         else:
             winsB+=1
     return winsA,winsB
def simOneGame2(probA,probB):
     scoreA,scoreB=0,0
     serving="A"
     while not GG(scoreA,scoreB):
         if serving=="A":
             if random() < probA:
                 scoreA += 1
             else:
                 serving="B"
         else:
             if random() < probB:
                 scoreB += 1
             else:
                 serving="A"
     return scoreA,scoreB
def simOneGame1(probA,probB):
    scoreA,scoreB=0,0
    serving="A"
    while not finalGameOver(scoreA,scoreB):
        if serving=="A":
            if random() < probA:
                scoreA += 1
            else:
                  serving="B"
        else:
            if random() < probB:
                scoreB += 1
            else:
                serving="A"
                return scoreA,scoreB
def GG(a,b):
    return a==3 or b==3
def finalGameOver(a,b):
     if (a==8 or b==8):
         if a>b:
             print("A队获得8分，双方交换场地")
         else:
             print("B队获得8分，双方交换场地")
     if (a>15 and abs(a-b)>=2 )or(b>15 and abs(a-b)>=2):
         return True
     else:
         return False
def finalprintSummary(winsA,winsB):
     n=winsA+winsB
     if n>=4:
         print("进行最终决赛")
         if winsA>winsB:
             print("最终决赛由A获胜")
         else:
             print("最终决赛由B获胜")
     else:
            if winsA>winsB:
                print("最终决赛由A获胜")
            else:
                print("最终决赛由B获胜")
def printSummary(winsA,winsB):
        n=winsA+winsB
        print("竞技分析开始，共模拟{}场比赛".format(n))
        print("选手A获胜{}场比赛，占比{:0.1%}".format(winsA,winsA/n))
        print("选手B获胜{}场比赛，占比{:0.1%}".format(winsB,winsB/n))
def main():
        printIntro()
        probA,probB,n=getInputs()
        winsA,winsB=simNGames(n,probA,probB)
        printSummary(winsA,winsB)
        final(probA,probB)
main()

运行结果为

以上的便是今天的学习