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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 _first_line_handler(self, data, search_pattern):
 """ In certain situations the first line will get repainted which causes a false match on the terminating pattern. Filter this out. returns a tuple of (data, first_line_processed) Where data is the original data potentially with the first line modified and the first_line_processed is a flag indicating that we have handled the first line. """

        try:
            # First line is the echo line containing the command. In certain situations
            # it gets repainted and needs filtered
            lines = data.split(self.RETURN)
            first_line = lines[0]
            if BACKSPACE_CHAR in first_line:
                pattern = search_pattern + r".*$"
                first_line = re.sub(pattern, repl="", string=first_line)
                lines[0] = first_line
                data = self.RETURN.join(lines)
            return (data, True)
        except IndexError:
            return (data, False)