直接上代码：
colours = ["red","green","blue"]
for colour in colours:
print colour
# red
# green
# blue
第二种方法
colours = ["red","green","blue"]
for i in range(0, len(colours)):
print i, colour[i]
# 0 red
# 1 green
# 2 blue
直接上代码：
colours = ["red","green","blue"]
for colour in colours:
print colour
# red
# green
# blue
第二种方法
colours = ["red","green","blue"]
for i in range(0, len(colours)):
print i, colour[i]
# 0 red
# 1 green
# 2 blue