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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 predict_mappings(self, mappings):

 """
 This function is used to predict the remote ports that a NAT
 will map a local connection to. It requires the NAT type to
 be determined before use. Current support for preserving and
 delta type mapping behaviour.
 """

        if self.nat_type not in self.predictable_nats:
            msg = "Can't predict mappings for non-predictable NAT type."
            raise Exception(msg)

        for mapping in mappings:
            mapping["bound"] = mapping["sock"].getsockname()[1]

            if self.nat_type == "preserving":
                mapping["remote"] = mapping["source"]

            if self.nat_type == "delta":
                max_port = 65535
                mapping["remote"] = int(mapping["source"]) + self.delta

                # Overflow or underflow = wrap port around.
                if mapping["remote"] > max_port:
                    mapping["remote"] -= max_port
                if mapping["remote"] < 0:
                    mapping["remote"] = max_port - -mapping["remote"]

                # Unknown error.
                if mapping["remote"] < 1 or mapping["remote"] > max_port:
                    mapping["remote"] = 1
                mapping["remote"] = str(mapping["remote"])

        return mappings