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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 __str(self, quote=False, prefix="", suffix=""):
 """Return a string representation of this SoSPredicate with optional prefix, suffix and value quoting. """

        quotes = '"%s"'
        pstr = "dry_run=%s, " % self._dry_run

        kmods = self._kmods
        kmods = [quotes % k for k in kmods] if quote else kmods
        pstr += "kmods=[%s], " % (",".join(kmods))

        services = self._services
        services = [quotes % s for s in services] if quote else services
        pstr += "services=[%s]" % (",".join(services))

        return prefix + pstr + suffix