Three types of traversal (ordinal and value) methods for the Python list

Three ways to iterate through the list of numbers and values:

Recently learn the language of Python, feel its work efficiency has a great improvement, special on Valentine's Day wrote this blog, the following nonsense say, direct sticker code

#!/usr/bin/env python#-*-coding:utf-8-*-if __name__ = = ' __main__ ':    list = [' html ', ' JS ', ' css ', ' python ']    # method 1    print ' traversal list Method 1: ' For    i in list:        print ("Ordinal:%s   value:%s"% (List.index (i) + 1, i))    print ' \ n Traverse list Method 2: ' 
 # Method 2 for    I in range (len list):        print ("Ordinal:%s   value:%s"% (i + 1, list[i])    # Method 3    print ' \ n Traverse list Method 3: '    for-I, Val in enumerate (list):        print ("Ordinal:%s   value:%s"% (i + 1, val))    # Method 3    print ' \ n Traverse list Method 3 (set traverse on Initial position, changed only the starting sequence number): ' For    I, Val in enumerate (list, 2):        print ("Ordinal:%s   value:%s"% (i + 1, val))

The results after running the code are as follows:

Introduce the enumerate () method here and look at the Help () function to see the following results:

Finally, the second parameter of the enumerate () function only changes the starting value of the ordinal, and does not change the other stuff.