Return a list containing unique values from a given array.

list_unique.py

import numpy as np

def list_unique(arr):
    """
    Return a list containing unique values from a given array.

    Args:
        arr (list or numpy.ndarray): The input list.

    Returns:
        list: A list containing unique values.

    Example:
        >>> arr = [1, 2, 3, 2, 4, 1, 5]
        >>> lst_unique = list_unique(arr)
        >>> lst_json = json.dumps(lst_unique, indent=2, ensure_ascii=False)
        >>> print(lst_json)
        [
          1, 
          2, 
          3, 
          4, 
          5
        ]
    """
    return np.unique(np.array(arr)).tolist()