<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def unique(lst):
 """ Returns a list made up of the unique values found in lst. i.e., it removes the redundant values in lst. """

    lst = lst[:]
    unique_lst = []

    # Cycle through the list and add each value to the unique list only once.
    for item in lst:
        if unique_lst.count(item) <= 0:
            unique_lst.append(item)
            
    # Return the list with all redundant values removed.
    return unique_lst