<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def run(self, run_priority: Optional[int] = None):
 """ Run a pyquil program on the QPU. This formats the classified data from the QPU server by stacking measured bits into an array of shape (trials, classical_addresses). The mapping of qubit to classical address is backed out from MEASURE instructions in the program, so only do measurements where there is a 1-to-1 mapping between qubits and classical addresses. :param run_priority: The priority with which to insert jobs into the QPU queue. Lower integers correspond to higher priority. If not specified, the QPU object's default priority is used. :return: The QPU object itself. """

        # This prevents a common error where users expect QVM.run()
        # and QPU.run() to be interchangeable. QPU.run() needs the
        # supplied executable to have been compiled, QVM.run() does not.
        if isinstance(self._executable, Program):
            raise TypeError("It looks like you have provided a Program where an Executable"
                            " is expected. Please use QuantumComputer.compile() to compile"
                            " your program.")
        super().run()

        request = QPURequest(program=self._executable.program,
                             patch_values=self._build_patch_values(),
                             id=str(uuid.uuid4()))
        job_priority = run_priority if run_priority is not None else self.priority
        job_id = self.client.call('execute_qpu_request', request=request, user=self.user,
                                  priority=job_priority)
        results = self._get_buffers(job_id)
        ro_sources = self._executable.ro_sources

        if results:
            bitstrings = _extract_bitstrings(ro_sources, results)
        elif not ro_sources:
            warnings.warn("You are running a QPU program with no MEASURE instructions. "
                          "The result of this program will always be an empty array. Are "
                          "you sure you didn't mean to measure some of your qubits?")
            bitstrings = np.zeros((0, 0), dtype=np.int64)
        else:
            bitstrings = None

        self._bitstrings = bitstrings
        self._last_results = results
        return self