Python书籍示例代码(第八章)

《Python语言程序设计基础（第2版）》嵩天著

第八章

●8 - 1
体育竞技分析

# e15.1MatchAnalysis.py
from random import random


def printIntro():
    print("这个程序模拟两个选手A和B的某种竞技比赛")
    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("请输入选手A的能力值(0-1): "))
    b = eval(input("请输入选手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):
    return a == 15 or b == 15


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 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)


main()


●8 - 2
第三方库批量安装程序

# e16.1BatchInstall.py
import os

libs = {"numpy", "matplotlib", "pillow", "sklearn", "requests", \
        "jieba", "beautifulsoup4", "wheel", "networkx", "sympy", \
        "pyinstaller", "django", "flask", "werobot", "pyqt5", \
        "pandas", "pyopengl", "pypdf2", "docopt", "pygame"}
try:
    for lib in libs:
        os.system("pip install " + lib)
    print("Successful")
except:
    print("Failed Somehow")