Python打印出变量
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我们现在要键入更多的变量并且把它们打印出来。这次我们将使用一个叫“格式化字符串 (format string)”的东西. 每一次你使用 " 把一些文本引用起来,你就建立了一个字符串。字符串是程序将信息展示 给人的方式。你可以打印它们,可以将它们写入文件,还可以将它们发送给网站服务器,很多事情都是通过字符串交流实现的。
字符串是非常好用的东西,所以再这个练习中你将学会如何创建包含变量内容的字符串。使用专门的格式和语法把变量的内容放到字符串里,相当于来告诉 python :“嘿,这是一个格式化字符串,把这些变量 放到那几个位置。”
一样的,即使你读不懂这些内容,只要一字不差地键入就可以了。
1 my_name = 'Zed A. Shaw'
2 my_age = 35 # not a lie
3 my_height = 7
4 # inches 4 my_weight = 180 # lbs
5 my_eyes = 'Blue'
6 my_teeth = 'White'
7 my_hair = 'Brown'
8
9 print "Let's talk about %s." % my_name
10 print "He's %d inches tall." % my_height
11 print "He's %d pounds heavy." % my_weight
12 print "Actually that's not too heavy."
13 print "He's got %s eyes and %s hair." % (my_eyes, my_hair)
14 print "His teeth are usually %s depending on the coffee." % my_teeth
15
16 # this line is tricky, try to get it exactly right
17 print "If I add %d, %d, and %d I get %d." % (
18 my_age, my_height, my_weight, my_age + my_height + my_weight)
运行的后的结果如下:
$
python ex5.py
Let's talk about Zed A. Shaw.
He's 74 inches tall.
He's 180 pounds heavy.
Actually that's not too heavy.
He's got Blue eyes and Brown hair.
His teeth are usually White depending on the coffee.
If I add 35, 74, and 180 I get 289.
$
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