Python技巧(enumerate)
>>> i = 0>>> seq = ['one', 'two', 'three']>>> for element in seq:... seq[i] = '%d: %s' % (i, seq[i])... i += 1...>>> seq['0: one', '1: two', '2: three']>>> seq = ['one', 'two', 'three']>>> for i, element in enumerate(seq):... seq[i] = '%d: %s' % (i, seq[i])...>>> seq['0: one', '1: two', '2: three']>>> def _treatment(pos, element):... return '%d: %s' %(pos, element)...>>> seq = ['one', 'two', 'three']>>> [_treatment(i, e1) for i, e1 in enumerate(seq)]['0: one', '1: two', '2: three']
