枚举enumerate

 names = ['old_driver', 'rain', ['oldboy', 'oldgirl'], 'jack', '珊珊', 'peiqi',
          'Alex', 'black_girl', 1, 2, 3, 4, 2, 5, 6, 2]
 for i,k in enumerate(names):   #枚举可以快捷的打印出索引和对应的元素
         print(i, k)

count = 0

names = ['old_driver', 'rain', ['oldboy', 'oldgirl'], 'jack', '珊珊', 'peiqi',
          'Alex', 'black_girl', 1, 2, 3, 4, 2, 5, 6, 2]

for i in names:
     print(count,i)
     count += 1    #用计数法也可以打印索引和对应的元素