第一种，最常用的，通过for in遍历数组

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

for colour in colours:
    print colour

# red
# green
# blue

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

for i in range(0, len(colours)):
    print i, colour[i]

# 0 red
# 1 green
# 2 blue

python遍历数组的两种方法