在练习ex14中，

运行提示错误need more than 1 value to unpack

百度搜索的来自知乎的解答

才发现再一次，又忘了同时Python ex14.py 的时候应该加上另外一个参数。

代码：

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from sys import argv

script, user_name = argv

prompt = '> '

print "Hi %s, I'm the %s script." % (user_name, script)

print "I'd like to ask you a few questions."

print "Do you like me %s?" % user_name

likes = raw_input(prompt)

print "Where do you live %s?" % user_name

lives = raw_input(prompt)

print "What kind of computer do you have?"

computer = raw_input(prompt)

print """

Alright, so you said %r about liking me.

You live in %r.Not sure where that is.

And you have a %r computer. Nice.

""" % (likes, lives, computer)

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在一开始定义了两个参数，一个script也就是运行时候的ex14.py也就是文件名本身。另一个参数是user_name，因此在Windows Powershell运行的时候Python ex14.py Zad

即可。

同样的，在前面ex13.py的习题中也会习惯性地遗漏另外一个参数。