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 a = [[], []]
a[1].append(1)
print(a)

 [[], [1]]

 ans = [[]]*5
arr = [4,1,3,2,5]
N=5
count = N*1
for i in range(N):
    if arr[i] == count:
        print("i = ", i,"    count = ",count)
        print(ans)
        ans[i].append(count)
        print(ans)

 i =  4     count =  5
[[], [], [], [], []]
[[5], [5], [5], [5], [5]]

 ans[2] = count

 ans = [[]]*5

 ans = [[], [], [], [], []]

 >>> lst=[1,2,3]
>>> lst
[1, 2, 3]
>>> incl_lst=[lst]*5
>>> incl_lst
[[1, 2, 3], [1, 2, 3], [1, 2, 3], [1, 2, 3], [1, 2, 3]]
>>> lst[1]=100
>>> lst
[1, 100, 3]
>>> incl_lst
[[1, 100, 3], [1, 100, 3], [1, 100, 3], [1, 100, 3], [1, 100, 3]]
>>>