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
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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
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