enumerate用法

　　

Return an enumerate object. sequence must be a sequence, an iterator, or some other object which sup-

ports iteration. The next() method of the iterator returned by enumerate() returns a tuple containing

a count (from start which defaults to 0) and the corresponding value obtained from iterating over iter-

able. enumerate() is useful for obtaining an indexed series: (0, seq[0]), (1, seq[1]), (2,

seq[2]), .... 

 

For example:

>>> for i, season in enumerate([’Spring’, ’Summer’, ’Fall’, ’Winter’]):

...

 print i, season

0 Spring

1 Summer

2 Fall

3 Winter