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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 matches(self, pattern):
 """ Construct a Filter that checks regex matches against ``pattern``. Parameters pattern : str Regex pattern against which to compare values produced by ``self``. Returns ------- matches : Filter Filter returning True for all sid/date pairs for which ``self`` produces a string matched by ``pattern``. See Also -------- :mod:`Python Regular Expressions <re>` """

        return ArrayPredicate(
            term=self,
            op=LabelArray.matches,
            opargs=(pattern,),
        )