qemu.py: Pylint/style fixes

        # vm is guaranteed to be shut down here

    '''

    def __init__(self, binary, args=[], wrapper=[], name=None, test_dir="/var/tmp",

                 monitor_address=None, socket_scm_helper=None, debug=False):

    def __init__(self, binary, args=[], wrapper=[], name=None,

                 test_dir="/var/tmp", monitor_address=None,

                 socket_scm_helper=None, debug=False):

        '''

        Initialize a QEMUMachine

        @param binary: path to the qemu binary

        @param args: list of extra arguments

        @param wrapper: list of arguments used as prefix to qemu binary

        @param name: prefix for socket and log file names (default: qemu-PID)

        @param test_dir: where to create socket and log file

        @param monitor_address: address for QMP monitor

        @param socket_scm_helper: helper program, required for send_fd_scm()"

        @param debug: enable debug mode

        @note: Qemu process is not started until launch() is used.

        '''

        if name is None:

            name = "qemu-%d" % os.getpid()

        if monitor_address is None:

        self._iolog = None

        self._socket_scm_helper = socket_scm_helper

        self._debug = debug

        self._qmp = None

    def __enter__(self):

        return self

        if self._socket_scm_helper is None:

            print >>sys.stderr, "No path to socket_scm_helper set"

            return -1

        if os.path.exists(self._socket_scm_helper) == False:

        if not os.path.exists(self._socket_scm_helper):

            print >>sys.stderr, "%s does not exist" % self._socket_scm_helper

            return -1

        fd_param = ["%s" % self._socket_scm_helper,

                    "%d" % self._qmp.get_sock_fd(),

                    "%s" % fd_file_path]

        devnull = open('/dev/null', 'rb')

        p = subprocess.Popen(fd_param, stdin=devnull, stdout=sys.stdout,

        proc = subprocess.Popen(fd_param, stdin=devnull, stdout=sys.stdout,

                                stderr=sys.stderr)

        return p.wait()

        return proc.wait()

    @staticmethod

    def _remove_if_exists(path):

        return self._popen.pid

    def _load_io_log(self):

        with open(self._qemu_log_path, "r") as fh:

            self._iolog = fh.read()

        with open(self._qemu_log_path, "r") as iolog:

            self._iolog = iolog.read()

    def _base_args(self):

        if isinstance(self._monitor_address, tuple):

                '-display', 'none', '-vga', 'none']

    def _pre_launch(self):

        self._qmp = qmp.qmp.QEMUMonitorProtocol(self._monitor_address, server=True,

        self._qmp = qmp.qmp.QEMUMonitorProtocol(self._monitor_address,

                                                server=True,

                                                debug=self._debug)

    def _post_launch(self):

        qemulog = open(self._qemu_log_path, 'wb')

        try:

            self._pre_launch()

            args = self._wrapper + [self._binary] + self._base_args() + self._args

            args = (self._wrapper + [self._binary] + self._base_args() +

                    self._args)

            self._popen = subprocess.Popen(args, stdin=devnull, stdout=qemulog,

                                           stderr=subprocess.STDOUT, shell=False)

                                           stderr=subprocess.STDOUT,

                                           shell=False)

            self._post_launch()

        except:

            if self.is_running():

            exitcode = self._popen.wait()

            if exitcode < 0:

                sys.stderr.write('qemu received signal %i: %s\n' % (-exitcode, ' '.join(self._args)))

                sys.stderr.write('qemu received signal %i: %s\n'

                                 % (-exitcode, ' '.join(self._args)))

            self._load_io_log()

            self._post_shutdown()

    underscore_to_dash = string.maketrans('_', '-')

    def qmp(self, cmd, conv_keys=True, **args):

        '''Invoke a QMP command and return the result dict'''

        '''Invoke a QMP command and return the response dict'''

        qmp_args = dict()

        for k in args.keys():

        for key in args.keys():

            if conv_keys:

                qmp_args[k.translate(self.underscore_to_dash)] = args[k]

                qmp_args[key.translate(self.underscore_to_dash)] = args[key]

            else:

                qmp_args[k] = args[k]

                qmp_args[key] = args[key]

        return self._qmp.cmd(cmd, args=qmp_args)

    def command(self, cmd, conv_keys=True, **args):

        '''

        Invoke a QMP command.

        On success return the response dict.

        On failure raise an exception.

        '''

        reply = self.qmp(cmd, conv_keys, **args)

        if reply is None:

            raise Exception("Monitor is closed")

        return events

    def event_wait(self, name, timeout=60.0, match=None):

        # Test if 'match' is a recursive subset of 'event'

        '''

        Wait for specified timeout on named event in QMP; optionally filter

        results by match.

        The 'match' is checked to be a recursive subset of the 'event'; skips

        branch processing on match's value None

           {"foo": {"bar": 1}} matches {"foo": None}

           {"foo": {"bar": 1}} does not matches {"foo": {"baz": None}}

        '''

        def event_match(event, match=None):

            if match is None:

                return True

        return None

    def get_log(self):

        '''

        After self.shutdown or failed qemu execution, this returns the output

        of the qemu process.

        '''

        return self._iolog