第一种，最常用的，通过for in遍历数组
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colours = ["red","green","blue"]for colour in colours: print colour# red# green# blue |
第二种，先获得数组的长度，然后根据索引号遍历数组，同时输出索引号
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colours = ["red","green","blue"]for i in range(0, len(colours)): print i, colour[i]# 0 red# 1 green# 2 blue |