Day 3

上了一天的课，还要准备报告的屁屁踢，今天就偷懒下，任务是阅读段代码。

print "Let's practice everything."   #注意单、双引号
print 'You\'d need to know \'bout escapes with \\ that do \n  newlines and \t tabs.'  #转义序列

poem = """
\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.
"""   #长字符串的使用

print "--------------"
print poem
print "--------------"

five = 10 - 2 + 3 - 6   #数学运算

print "This should be five: %s" % five  #格式化字符串

def secret_formula(started):  #函数，注意冒号。
   jelly_beans = started * 500  #注意缩进
   jars = jelly_beans / 1000
   crates = jars / 100
   return jelly_beans, jars, crates 

start_point = 10000

beans, jars, crates = secret_formula(start_point)

print "With a starting point of: %d" % start_point

print "We'd have %d beans, %d jars, and %d crates." % (beans, jars, crates)

start_point = start_point / 10

print "We can also do that this way:"

print "We'd have %d beans, %d jars, and %d crates." % secret_formula(start_point)