qq_26097991 于 2017.09.04 18:19 提问
- 关于python索引的问题
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具体代码如下:
age = 20
name = 'Swaroop'
print('{0} was {1} years old when he wrote this book'.format(name, age))
print('Why is {0} playing with that python?'.format(name))
输出：
$ python str_format.py Swaroop was 20 years old when he wrote this book Why is Swaroop playing with that python?我想问一下python的索引从0开始 那么0不应该是age 1不应该是name吗?
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oyljerry
2017.09.05 20:39
0，1是format的参数占位符，就是表示第一个，第二个参数。也就是name，age来替换对应位置字符串
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- WLY19930402 2017.09.07 10:58
这个主要看foemat后面的顺序，你把name放在前面，那么name就是0，你可以把name 和age 的位置换一下，
age = 20
name = 'Swaroop'
print('{0} was {1} years old when he wrote this book'.format( age，name))
print('Why is {0} playing with that python?'.format(age))看看结果。
这是format函数灵活的地方，format（v1,v2,...）v1总是对应第一个{0}，v2对应{1}，以此类推。