Hearn Python The Hard Way ex4 变量和命名

# -*- coding: UTF-8 -*-
you = "is"     #对字符串you赋值为is,赋的值要用单引号或双引号括起来
cars = 100   # 定义cars这个变量并赋值为100
space_in_a_car = 4.0  # 定义space_in_a_car这个变量并赋值为4.0
drivers = 30   # 定义drivers这个变量并赋值为30
passengers = 90  # 定义passengers这个变量并赋值为90
cars_not_driven = cars - drivers  # 给出算法：没有被开的车数量=车子总数-司机人数
cars_driven = drivers  # 给出算法：被开的车辆数=司机人数
carpool_capacity = cars_driven * space_in_a_car  #给出算法：车子总容量 = 没有被开的车数量*每辆车的容量
average_passengers_per_car = passengers / cars_driven  #给出算法：平均每个乘客每辆车 = 乘客数 / 被开的车辆数

print "There are",cars,"cars available." #cars变量在输出的时候直接打印其内容
print "There are only",drivers,"drivers available."
print "There will be",cars_not_driven,"empty cars today."
print "We can transport",carpool_capacity,"people today."
print "We have",passengers,"to carpool today."
print "We need to put about",average_passengers_per_car,"in each car."
print "He %s there."%you  #%s代表打印字符串变量，字符串%you这种格式要记牢