python enumerate函数用法

http://www.cnblogs.com/linjiqin/p/4228896.html

enumerate函数用于遍历序列中的元素以及它们的下标

i = 0

seq = ['one', 'two', 'three']

for element in seq:

    print i, seq[i]

    i += 1

#0 one

#1 two

#2 three



print '============'

seq = ['one', 'two', 'three']

for i, element in enumerate(seq):

    print i, seq[i]

    

print '============'

for i,j in enumerate('abc'):

    print i,j

#0 a

#1 b

#2 c



print '============'

def _treatment(pos, element):

    return '%d: %s' %(pos, element)



seq = ['one', 'two', 'three']

print [_treatment(i, e1) for i, e1 in enumerate(seq)]