def has_duplicates(input_list):
    """
    Method to check if a given collection has duplicate values
    :rtype: bool
    :param input_list: A list of values
    :return: returns True if there are any duplicate elements
    """
    if input_list is None:
        return False
    unique = set(input_list)
    if len(unique) == len(input_list):
        return False
    return True