import numpy as np

cars = np.array([["Ford", 25, "oct"],["Fiat", 26, "jan"],["Opel", 30, "feb"],["Ford", 50, "may"]])  #definiuje array


owned_cars_list = [row[0] for row in cars] # pobieram 1 kolumne

owned_cars_list = list(dict.fromkeys(owned_cars_list)) # usuwam duplikaty
owned_cars = np.array( owned_cars_list ) #przerabian ba array aby pozniej dodawac nowe wiersze

print(owned_cars)

owned_cars[2]= "jaguar1234455"  # chce podmienic wartosc ale miesci sie tylko 4 znaki ???

print(owned_cars)