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Python methods to traverse serial numbers and values in a list (three methods)
- 高洛峰Original
- 2017-02-20 10:08:451664browse
Three ways to traverse the serial numbers and values in the list:
I recently learned the language python and felt that it has greatly improved my work efficiency, so I wrote this on Valentine's Day. In this blog, without further ado, I will post the code directly
#!/usr/bin/env python
# -*- coding: utf-8 -*-
if __name__ == '__main__':
list = ['html', 'js', 'css', 'python']
# 方法1
print '遍历列表方法1：'
for i in list:
print ("序号：%s 值：%s" % (list.index(i) + 1, i))
print '\n遍历列表方法2：'
# 方法2
for i in range(len(list)):
print ("序号：%s 值：%s" % (i + 1, list[i]))
# 方法3
print '\n遍历列表方法3：'
for i, val in enumerate(list):
print ("序号：%s 值：%s" % (i + 1, val))
# 方法3
print '\n遍历列表方法3 （设置遍历开始初始位置，只改变了起始序号）：'
for i, val in enumerate(list, 2):
print ("序号：%s 值：%s" % (i + 1, val))
The result after running the code is as shown below:
Here is an introduction to the enumerate() method, which can be viewed by viewing the help() function. The query results are as follows:
Finally, a reminder, enumerate( )The second parameter of the function only changes the starting value of the serial number, and does not change other things
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