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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 search(self, string, pos=0, endpos=None, evaluate_result=True):
        '''Search the string for my format.

        Optionally start the search at "pos" character index and limit the
        search to a maximum index of endpos - equivalent to
        search(string[:endpos]).

        If the ``evaluate_result`` argument is set to ``False`` a
        Match instance is returned instead of the actual Result instance.

        Return either a Result instance or None if there's no match.
        '''
        if endpos is None:
            endpos = len(string)
        m = self._search_re.search(string, pos, endpos)
        if m is None:
            return None

        if evaluate_result:
            return self.evaluate_result(m)
        else:
            return Match(self, m)