numbers = [1, 3, 2, 1, 3]
# Fastest, the order is not kept
unique = list(set(numbers))
# unique is [1, 2, 3]
print(f'{unique = }')
# Keeps the order of first occurrence
unique_ordered = list(dict.fromkeys(numbers))
# unique_ordered is [1, 3, 2]
print(f'{unique_ordered = }')