enumerate用法

Posted 2020-11-06 侠客行

enumerate 作用：新增一列，自动累加（类似表格中的自增列）,一般用于for循环中

例1：

li2 = ["电脑","鼠标","内存","键盘"]
for i,j in enumerate(li2,0):
    print(i,j)
inp = input("请输入0-3：")

inp2 = int(inp)

len2 = len(li2)
if inp2 >=0 and inp2 < len2:
  res = li2[inp2]
  print("你选择的商品是: " + res)
else:
　print("商品不存在！”）

运行效果：

例2：

li2 = [{"name":"电脑","price":4500},{"name":"鼠标","price":35},{"name":"内存","price":200},{"name":"键盘","price":30}]
for i,j in enumerate(li2,0):
    print(i,j["name"],j["price"])
inp = input("请输入0-3：")
inp2 = int(inp)
res = li2[inp2]["name"]
res1 = li2[inp2]["price"]
print("你选择的商品是: " + res + " 价格为：" +str(res1))