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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 _configure_port_binding(self, is_provider_vlan, duplicate_type, is_native, switch_ip, vlan_id, intf_type, nexus_port, vni):
 """Conditionally calls vlan and port Nexus drivers."""


        # This implies VLAN, VNI, and Port are all duplicate.
        # Then there is nothing to configure in Nexus.
        if duplicate_type == const.DUPLICATE_PORT:
            return

        auto_create, auto_trunk = self._gather_config_parms(
            is_provider_vlan, vlan_id)

        # if type DUPLICATE_VLAN, don't create vlan
        if duplicate_type == const.DUPLICATE_VLAN:
            auto_create = False

        if auto_create and auto_trunk:
            LOG.debug("Nexus: create vlan %s and add to interface", vlan_id)
            self.driver.create_and_trunk_vlan(
                switch_ip, vlan_id, intf_type,
                nexus_port, vni, is_native)
        elif auto_create:
            LOG.debug("Nexus: create vlan %s", vlan_id)
            self.driver.create_vlan(switch_ip, vlan_id, vni)
        elif auto_trunk:
            LOG.debug("Nexus: trunk vlan %s", vlan_id)
            self.driver.send_enable_vlan_on_trunk_int(
                switch_ip, vlan_id,
                intf_type, nexus_port, is_native)