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# 习题 7: 更多打印 现在我们将做一批练习,在练习的过程中你需要键入代码,并且让它们运行起来。我不会解释太多,因为这节的内容都是以前熟悉过的。这节练习的目的是巩固你学到的东西。我们几个练习后再见。不要跳过这些习题。不要复制粘贴! <table class="highlighttable"><tbody><tr><td class="linenos"> <div class="linenodiv"> <pre> 1&#13; 2&#13; 3&#13; 4&#13; 5&#13; 6&#13; 7&#13; 8&#13; 9&#13; 10&#13; 11&#13; 12&#13; 13&#13; 14&#13; 15&#13; 16&#13; 17&#13; 18&#13; 19&#13; 20&#13; 21</pre> </div> </td> <td class="code"> <div class="highlight"> <pre>print "Mary had a little lamb."&#13; print "Its fleece was white as %s." % 'snow'&#13; print "And everywhere that Mary went."&#13; print "." * 10 # what'd that do?&#13; &#13; end1 = "C"&#13; end2 = "h"&#13; end3 = "e"&#13; end4 = "e"&#13; end5 = "s"&#13; end6 = "e"&#13; end7 = "B"&#13; end8 = "u"&#13; end9 = "r"&#13; end10 = "g"&#13; end11 = "e"&#13; end12 = "r"&#13; &#13; # watch that comma at the end. try removing it to see what happens&#13; print end1 + end2 + end3 + end4 + end5 + end6,&#13; print end7 + end8 + end9 + end10 + end11 + end12&#13; </pre> </div> </td> </tr></tbody></table> ### 你应该看到的结果 ~~~ $ python ex7.py Mary had a little lamb. Its fleece was white as snow. And everywhere that Mary went. .......... Cheese Burger $ ~~~ ### 加分习题 接下来几节的加分习题是一样的。 1. 逆向阅读,在每一行的上面加一行注解。 1. 倒着朗读出来,找出自己的错误。 1. 从现在开始,把你的错误记录下来,写在一张纸上。 1. 在开始下一节习题时,阅读一遍你记录下来的错误,并且尽量避免在下个练习中再犯同样的错误。 1. 记住,每个人都会犯错误。程序员和魔术师一样,他们希望大家认为他们从不犯错,不过这只是表象而已,他们每时每刻都在犯错。