练习9.打印, 打印, 打印

现在,你应该明白这本书的模式是用做很多的练习来教会你新知识。我以你可能不明白的代码开始教学,然后在用更多的习题去解释一些概念。即使你现在并不明白,经过大量的练习之后你也能明白了。记录你不明白的地方,然后坚持做练习题,你会收获更多。

# Here's some new strange stuff, remember type it exactly.

days = "Mon Tue Wed Thu Fri Sat Sun"
months = "Jan\nFeb\nMar\nApr\nMay\nJun\nJul\nAug"

print "Here are the days: ", days
print "Here are the months: ", months

print """
There's something going on here.
With the three double-quotes.
We'll be able to type as much as we like.
Even 4 lines if we want, or 5, or 6.
"""

你看到的结果

$ python ex9.py
Here are the days:  Mon Tue Wed Thu Fri Sat Sun
Here are the months:  Jan
Feb
Mar
Apr
May
Jun
Jul
Aug

There's something going on here.
With the three double-quotes.
We'll be able to type as much as we like.
Even 4 lines if we want, or 5, or 6.

附加题

  1. 自己检查结果,记录你犯过的错误,并且在下个练习中尽量不犯同样的错误。

常见问题

Q: 为什么当我使用\n来换行的时候,%r就不生效了?

这就是%r格式的工作原理;你如何输入的,它就如何打印输出。

Q:为什么当我在3个双引号中间输入空格的时候,会报错?

你应该这样写"""而不是" " ",意思是说每两个双引号之间不能有空格。

Q:我的错误经常是一些拼写错误,这样是不是很差?

在编程初期,大部分错误都是一些简单的错误,比如拼写问题,错别字,或者是将简单的事情搞砸。这很正常,不用担心,但是也要尽量不犯相同的错误。

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