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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 qemu_path(self, qemu_path):
 """ Sets the QEMU binary path this QEMU VM. :param qemu_path: QEMU path """


        if qemu_path and os.pathsep not in qemu_path:
            if sys.platform.startswith("win") and ".exe" not in qemu_path.lower():
                qemu_path += "w.exe"
            new_qemu_path = shutil.which(qemu_path, path=os.pathsep.join(self._manager.paths_list()))
            if new_qemu_path is None:
                raise QemuError("QEMU binary path {} is not found in the path".format(qemu_path))
            qemu_path = new_qemu_path

        self._check_qemu_path(qemu_path)
        self._qemu_path = qemu_path
        self._platform = os.path.basename(qemu_path)
        if self._platform == "qemu-kvm":
            self._platform = "x86_64"
        else:
            qemu_bin = os.path.basename(qemu_path)
            qemu_bin = re.sub(r'(w)?\.(exe|EXE)$', '', qemu_bin)
            # Old version of GNS3 provide a binary named qemu.exe
            if qemu_bin == "qemu":
                self._platform = "i386"
            else:
                self._platform = re.sub(r'^qemu-system-(.*)$', r'\1', qemu_bin, re.IGNORECASE)
        if self._platform.split(".")[0] not in QEMU_PLATFORMS:
            raise QemuError("Platform {} is unknown".format(self._platform))
        log.info('QEMU VM "{name}" [{id}] has set the QEMU path to {qemu_path}'.format(name=self._name,
                                                                                       id=self._id,
                                                                                       qemu_path=qemu_path))