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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def most_frequent(lst):
 """ Returns the item that appears most frequently in the given list. """

    lst = lst[:]
    highest_freq = 0
    most_freq = None

    for val in unique(lst):
        if lst.count(val) > highest_freq:
            most_freq = val
            highest_freq = lst.count(val)
            
    return most_freq