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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 _parse_by_pattern(self, lines, pattern):
 """Match pattern line by line and return Results. Use ``_create_output_from_match`` to convert pattern match groups to Result instances. Args: lines (iterable):
 Output lines to be parsed. pattern: Compiled pattern to match against lines. result_fn (function):
 Receive results of one match and return a Result. Return: generator: Result instances. """

        for line in lines:
            match = pattern.match(line)
            if match:
                params = match.groupdict()
                if not params:
                    params = match.groups()
                yield self._create_output_from_match(params)