我想向空列表的特定索引插入一些元素

Question

I have s empty array. For example: base=[] . Then i want to insert "Tofiq" string to 3 th element. If i use print(base[3]) it must return "Tofiq" string. Please help me about it!

Answer 1

You either have to add intermediate elements to the list or use a dictionary instead of a list.

 base   = []     
 index  = 3
 base  += [None]*(index-len(base)+1)
 base[index] = "ToFig"

or

 base    = dict()
 base[3] = "ToFig"

Answer 2

list不能有空节点，因此请填充列表，直到所需的索引或使用字典为止

Answer 3

When you assign 'Tofiq' to index 3 of the empty list (for example, base[3] = 'Tofiq' ), it will give IndexError. You should initialize your list instead of creating an empty list.