python 遍历数组的方法

python 遍历数组有两种方法，一种是使用for in 来遍历数组，一种是先获得数组的长度，然后根据索引号遍历数组，同时输出索引号。

for in 遍历数组方法：

colours = ["red","green","blue"]

for colour in colours:
    print colour

red
green
blue

遍历数组方法二：

colours = ["red","green","blue"]
 
for i in range(0, len(colours)):
    print i, colour[i]
 
0 red
1 green
2 blue