get unique value from list (python source code)

..

import numpy as np

def unique(list1):

x = np.array(list1)

x = np.unique(x)

return list(x)

list1 = [10, 20, 10, 30, 40, 40]

list1 = unique(list1)

print(list1)

..
output
[10, 20, 30, 40]
..