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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 _unique_ordered_lines(line_numbers):
 """ Given a list of line numbers, return a list in which each line number is included once and the lines are ordered sequentially. """


        if len(line_numbers) == 0:
            return []

        # Ensure lines are unique by putting them in a set
        line_set = set(line_numbers)

        # Retrieve the list from the set, sort it, and return
        return sorted([line for line in line_set])