列表推导式实现列表元素的平移复制

lxping

1. list_one = ["3","4","5","6","7","8","9","10","J","Q","K","1","2"]
   
2. list_double = []
   
3. [list_double.insert(i,list_one[int(i/2)]) for i in range(2*len(list_one))]
   
4. [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None]
   
5. list_double
   
6. ['3', '3', '4', '4', '5', '5', '6', '6', '7', '7', '8', '8', '9', '9', '10', '10', 'J', 'J', 'Q', 'Q', 'K', 'K', '1', '1', '2', '2']

复制代码