【Python基础】enumerate遍历使用

# enumerate可以加索引
fruit = ["apple", 'orange', "banana", "watermelon","pomelo","pear","guava"]

#for x in enumerate(fruit):     #(0, 'apple')
#    print(x)					#<class 'tuple'>
for i, x in enumerate(fruit):
    print(i, x)

print("-------------")
#反方向输出
for i, x in enumerate(reversed(fruit)):
    print(i, x)
print("-------------")
#按照字典顺序输出
for i, x in enumerate(sorted(fruit)):
    print(i, x)

# result:
0 apple
1 orange
2 banana
3 watermelon
4 pomelo
5 pear
6 guava
-------------
0 guava
1 pear
2 pomelo
3 watermelon
4 banana
5 orange
6 apple
-------------
0 apple
1 banana
2 guava
3 orange
4 pear
5 pomelo
6 watermelon