笨办法习题24

反斜扛“\”相关的一些用法，学习函数新的使用方法，如赋值给变量

print("让我们练习一切。")
# \\输出一个斜扛 \n换行  \t制表符
print("You\'d need to know \'bout escapes with \\ that do \n newlines and \t tabs.")

pome = """
\tThe lovely world
with logic so firmly planted
cannot discern \n the needs of love
nor comprehend passion from intuition
and requires an explanation
\n\t\twhere there is none.
"""

print("------------------")
print(pome)
print("------------------")
# print(print(print(pome)))   # 多打印出2个None，怎么理解？可以这样用吗？


five = 10 - 2 + 3 - 6
print("这应该是five：%s" % five)


def secret_formula(started):
    jelly_beans = started * 500
    jars = jelly_beans / 1000
    crates = jars / 100
    return jelly_beans, jars, crates


start_point = 10000
# 函数调用的返回值赋值给变量，这个要学习记录（注意返回值的数量与变量的数量应该是相等的）
beans, jars, crates = secret_formula(start_point)

print("一个起点: %d" % start_point)
print("我们有%d个豆子，%d个罐子和%d个板条箱。" % (beans, jars, crates))

start_point = start_point // 10

print("我们也可以这样做：")
print("我们有%d个豆子，%d个罐子和%d个板条箱。" % secret_formula(start_point))