I have a list of lists like this.

lst=[[0, 0.05],
 [1, 0.02],
 [3, 0.02],
 [5, 0.01]]

I want to add the missing lists in the list to get this.

lst=[[0, 0.05],
 [1, 0.02],
 [2, 0.01],
 [3, 0.01],
 [4, 0.005],
 [5, 0.005]]

Here, [2,x2] added between [1,x1] and [3,x3] and x2=x3/2 and x3=x2 is performed. Same is to be done for [4, x4].

I have tried this.

for i in range(len(lst)):
    if lst[i][0]!=i:
        lst1=[]
        lst1.append(i)
        lst1.append(lst[i+1][1]/2)
        lst.append(lst1)

This code is unable to keep track of the element being iterated and adds duplicates and wrong values.