I am getting index out of error in this in python [duplicate]

Question

I am having an array A=[9, 9, 3, 6, 3]. Why am I getting index out of range error?

def hello(A):
    A = set(A)
    A = list(A)
    A.sort()
    for i in range(len(A)):
        for j in range(1, len(A)):
            if A[j] % A[i] == 0:
                A.remove(A[j])
    return len(A)

Answer 1

def hello(A):
   A=set(A)
   A=list(A)
   A.sort()
   final_list = A.copy()      # copy the list 
   for i in range(len(A)):
       for j in range(1,len(A)):
            if(A[j]%A[i]==0):
                if A[j] in final_list:
                    final_list.remove(A[j])  # removed from the copied list instead original list A
   return final_list