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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 _get_vlan_body_on_trunk_int(self, nexus_host, vlanid, intf_type, interface, is_native, is_delete, add_mode):
 """Prepares an XML snippet for VLAN on a trunk interface. :param nexus_host: IP address of Nexus switch :param vlanid: Vlanid(s) to add to interface :param intf_type: String which specifies interface type. example: ethernet :param interface: String indicating which interface. example: 1/19 :param is_native: Is native vlan config desired? :param is_delete: Is this a delete operation? :param add_mode: Add mode trunk :returns path_snippet, body_snippet """


        starttime = time.time()

        LOG.debug("NexusDriver get if body config for host %s: "
                  "if_type %s port %s",
                  nexus_host, intf_type, interface)
        if intf_type == "ethernet":
            body_if_type = "l1PhysIf"
            path_interface = "phys-[eth" + interface + "]"
        else:
            body_if_type = "pcAggrIf"
            path_interface = "aggr-[po" + interface + "]"

        path_snip = (snipp.PATH_IF % (path_interface))

        mode = snipp.BODY_PORT_CH_MODE if add_mode else ''
        if is_delete:
            increment_it = "-"
            debug_desc = "delif"
            native_vlan = ""
        else:
            native_vlan = 'vlan-' + str(vlanid)
            debug_desc = "createif"
            if vlanid is "":
                increment_it = ""
            else:
                increment_it = "+"

        if is_native:
            body_snip = (snipp.BODY_NATIVE_TRUNKVLAN %
                (body_if_type, mode, increment_it + str(vlanid),
                str(native_vlan)))
        else:
            body_snip = (snipp.BODY_TRUNKVLAN %
                (body_if_type, mode, increment_it + str(vlanid)))

        self.capture_and_print_timeshot(
            starttime, debug_desc,
            switch=nexus_host)

        return path_snip, body_snip