在列表中的特定位置插入元素

Question

i have a problem using list.insert method. You can see my code below.

z=[1,9,6,5,5,3,4,6]
y=['1','4','9','7','6','5','5','1','5','0','3','3','4','1','6','0']
z.insert(z[0],int(y[1]))
print(z)
[1, 4, 9, 6, 5, 5, 3, 4, 6]
z.insert(z[2],int(y[3]))
print(z)
[1, 4, 9, 6, 5, 5, 3, 4, 6, 7]

Why does 7 go after 6 and not after 9???? Thanks in advance!!

Answer 1

z[2] is 9 .

[1, 4, 9, 6, 5, 5, 3, 4, 6]
       ^

You move it to the 9th index (after 6 ).

Answer 2

z=[1,9,6,5,5,3,4,6]
y=['1','4','9','7','6','5','5','1','5','0','3','3','4','1','6','0']
z.insert(z[0],int(y[1]))  #grabs 1 from z, and 4 from y
print(z)
[1, 4, 9, 6, 5, 5, 3, 4, 6]
z.insert(z[2],int(y[3]))  #grabs index 2 from z which is 9, 
                          #and insert will insert into the last element 
                          #if the index is out of range
print(z)
[1, 4, 9, 6, 5, 5, 3, 4, 6, 7]