<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def drop_tip( self, location: Union[types.Location, Well] = None)\ -> 'InstrumentContext': """ Drop the current tip. If no location is passed, the Pipette will drop the tip into its :py:attr:`trash_container`, which if not specified defaults to the fixed trash in slot 12. The location in which to drop the tip can be manually specified with the `location` argument. The `location` argument can be specified in several ways: - If the only thing to specify is which well into which to drop a tip, `location` can be a :py:class:`.Well`. For instance, if you have a tip rack in a variable called `tiprack`, you can drop a tip into a specific well on that tiprack with the call `instr.pick_up_tip(tiprack.wells()[0])`. This style of call can be used to make the robot drop a tip into arbitrary labware. - If the position to drop the tip from as well as the :py:class:`.Well` to drop the tip into needs to be specified, for instance to tell the robot to drop a tip from an unusually large height above the tiprack, `location` can be a :py:class:`.types.Location`; for instance, you can call `instr.pick_up_tip(tiprack.wells()[0].top())`. .. note:: OT1 required homing the plunger after dropping tips, so the prior version of `drop_tip` automatically homed the plunger. This is no longer needed in OT2. If you need to home the plunger, use :py:meth:`home_plunger`. :param location: The location to drop the tip :type location: :py:class:`.types.Location` or :py:class:`.Well` or None :returns: This instance """

        if location and isinstance(location, types.Location):
            if isinstance(location.labware, Well):
                target = location
            else:
                raise TypeError(
                    "If a location is specified as a types.Location (for "
                    "instance, as the result of a call to "
                    "tiprack.wells()[0].top()) it must be a location "
                    "relative to a well, since that is where a tip is "
                    "dropped. The passed location, however, is in "
                    "reference to {}".format(location.labware))
        elif location and isinstance(location, Well):
            if 'fixedTrash' in quirks_from_any_parent(location):
                target = location.top()
            else:
                bot = location.bottom()
                target = bot._replace(
                    point=bot.point._replace(z=bot.point.z + 10))
        elif not location:
            target = self.trash_container.wells()[0].top()
        else:
            raise TypeError(
                "If specified, location should be an instance of "
                "types.Location (e.g. the return value from "
                "tiprack.wells()[0].top()) or a Well (e.g. tiprack.wells()[0]."
                " However, it is a {}".format(location))
        self.move_to(target)
        self._hw_manager.hardware.drop_tip(self._mount)
        self._last_tip_picked_up_from = None
        return self