How to remove duplicate number

Answer 1

If you mean from a list, just transform it into a set:
k=[1, 1,1,1,15]
s=set(k)

Answer 2

If the duplicates are in a list, and you want to remove duplicates while keeping the order of the numbers, you can use a for loop to insert the number to another list. While inserting, check whether a number already exists in the destination list.

dups = [1,9,2,3,8,3,0,7,4,1,6,5,0,5]
unique = []
for n in dups:
if not n in unique:
unique.append(n)
print(dups)
print(unique)

This requires more lines written, but the numbers will not be sorted; as it will if we make a set from the list.

Hth, cmiiw