Python 内建函数enumerate() 由于这个单纯很长，不容易记住，用法还是比较广泛的，下面讲述Python内建函数enumerate()用法。

1，实例

enumerate(sequence, [start=0])

2，enumerate()用法

>>>seasons = ['Spring', 'Summer', 'Fall', 'Winter']

>>> list(enumerate(seasons))

[(0, 'Spring'), (1, 'Summer'), (2, 'Fall'), (3, 'Winter')]

>>> list(enumerate(seasons, start=1)) # 小标从 1 开始

[(1, 'Spring'), (2, 'Summer'), (3, 'Fall'), (4, 'Winter')]

3，在for循环应用

普通的 for 循环

>>>i = 0

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

>>> for element in seq:

... print i, seq[i]

... i +=1

...

0 one

1 two

2 three

for 循环使用 enumerate

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

>>> for i, element in enumerate(seq):

... print i, element

...

0 one

1 two

2 three

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