请告诉我示例，如何使用顺序访问创建 - PyQt4.QtCore.QIODevice。这必须是像这样的QIODevice：
printing - isinstance(data, QIODevice) : True
printing - data.isSequential(): True
printing - data.isTextModeEnabled(): False
printing - data.dumpObjectTree(): None
printing - data.__weakref__: None
printing - data.__class__: <class 'PyQt4.QtCore.QIODevice'>
printing - data.__dict__: {}
printing - data.__doc__': QIODevice()
QIODevice(QObject)
printing - data.__format__': <built-in method __format__ of QIODevice object at 0x02C2EDA0>
printing - data.'__reduce__': <built-in method __reduce__ of QIODevice object at 0x02C2EDA0>
printing - data.'__reduce_ex__': <built-in method __reduce_ex__ of QIODevice object at 0x02C2EDA0>
print dir（data）
打印 - [＆＃39;追加＆＃39;，＆＃39; NotOpen＆＃39;，＆＃39; OpenMode＆＃39;，＆＃39; OpenModeFlag＆＃39;，＆＃39; ReadOnly＆＃39;，＆＃ 39; ReadWrite＆＃39;，＆＃39; Text＆＃39;，＆＃39;截断＆＃39;，＆＃39; Unbuffered＆＃39;，＆＃39; WriteOnly＆＃39;，＆＃39; 课程＆＃39;，＆＃39; delattr ＆＃39;，＆＃39; dict ＆＃39;，＆＃39; doc ＆＃39;，＆＃39; 格式＆＃39;，＆＃39; getattr ＆＃39;，＆＃39; < strong> getattribute ＆＃39;，＆＃39; 哈希＆＃39;，＆＃39; init ＆＃39;，＆＃39; 模块＆＃39;，＆＃39; 新＆＃39;，＆＃39; 降低＆＃39;，＆＃39;＆＃39; ; reduce_ex ＆＃39;，＆＃39; repr ＆＃39;，＆＃39; setattr ＆＃39;，＆＃ 39; sizeof ＆＃39;，＆＃39; str ＆＃39;，＆＃39; 子类隐藏＆＃39;，＆ ＃39; weakref ＆＃39;，＆＃39; aboutToClose＆＃39;，＆＃39; atEnd＆＃39;，＆＃39; blockSignals＆＃39;，＃39; bytesAvailable＆＃39 ;，＆＃39; bytesToWrite＆＃39;，＆＃39; b ytesWritten＆＃39;，＆＃39; canReadLine＆＃39;，childEvent＆＃39;，＆＃39; children＆＃39;，＆＃39; close＆＃39;，＆＃39; connect＆＃39;， ＆nbsp;＆nbsp;＆nbsp;＆nbsp;＆nbsp; ＃39;，＆＃39; dumpObjectInfo＆＃39;，＆＃39; dumpObjectTree＆＃39;，＆＃39; dynamicPropertyNames＆＃39;，＆＃39; emit＆＃39;，＆＃39; errorString＆＃39;，＆ ＃39; event＆＃39;，＆＃39; eventFilter＆＃39;，＆＃39; findChild＆＃39;，＆＃39; findChildren＆＃39;，＆＃39; getChar＆＃39;，＆＃39; inherits＆＃ 39;，＆＃39; installEventFilter＆＃39;，＆＃39; isOpen＆＃39;，＆＃39; isReadable＆＃39;，＆＃39; isSequential＆＃39;，＆＃39; isTextModeEnabled＆＃39;，＆＃ 39; isWidgetType＆＃39;，＆＃39; isWritable＆＃39;，＆＃39; killTimer＆＃39;，＆＃39; metaObject＆＃39;，＆＃39; moveToThread＆＃39;，＆＃39; objectName＆＃39 ;，＆＃39; open＆＃39;，＆＃39; openMode＆＃39;，＆＃39; parent＆＃39;，＆＃39; peek＆＃39;，＆＃39; pos＆＃39;，＆＃39 ; property＆＃39;，＆＃39; putChar＆＃39;，＆＃39; pyqtConfigure＆＃39;，＆＃39; read＆＃39;，＆＃39; readAll＆＃39;，＆＃39; readChannelFinished＆＃39; ，＆＃39; readData＆＃39;， ＆＃39; readLine＆＃39;，＆＃39; readLineData＆＃39;，＆＃39; readyRead＆＃39;，＆＃39; receiver＆＃39;，＆＃39; removeEventFilter＆＃39;，＆＃39; reset＆ ＃39;，＆＃39;搜索＆＃39;，＆＃39;发件人＆＃39;，＆＃39; senderSignalIndex＆＃39;，＆＃39; setErrorString＆＃39;，＆＃39; setObjectName＆＃39;，＆ ＃39; setOpenMode＆＃39;，＆＃39; setParent＆＃39;，＆＃39; setProperty＆＃39;，＆＃39; setTextModeEnabled＆＃39;，＆＃39; signalsBlocked＆＃39;，＆＃39; size＆＃ 39;，＆＃39; startTimer＆＃39;，＆＃39; staticMetaObject＆＃39;，＆＃39; thread＆＃39;，＆＃39; timerEvent＆＃39;，＆＃39; tr＆＃39;，＆＃ 39; trUtf8＆＃39;，＆＃39; ungetChar＆＃39;，＆＃39; waitForBytesWritten＆＃39;，＆＃39; waitForReadyRead＆＃39;，＆＃39; write＆＃39;，＆＃39; writeData＆＃39 ]
Print all properties:
obj.Append = 4
obj.NotOpen = 0
obj.OpenMode = <class 'PyQt4.QtCore.OpenMode'>
obj.OpenModeFlag = <class 'PyQt4.QtCore.OpenModeFlag'>
obj.ReadOnly = 1
obj.ReadWrite = 3
obj.Text = 16
obj.Truncate = 8
obj.Unbuffered = 32
obj.WriteOnly = 2
obj.__class__ = <class 'PyQt4.QtCore.QIODevice'>
obj.__delattr__ = <method-wrapper '__delattr__' of QIODevice object at 0x02C2EDA0>
obj.__dict__ = {}
obj.__doc__ = QIODevice()
QIODevice(QObject)
obj.__format__ = <built-in method __format__ of QIODevice object at 0x02C2EDA0>
obj.__getattr__ = <built-in method __getattr__ of QIODevice object at 0x02C2EDA0>
obj.__getattribute__ = <method-wrapper '__getattribute__' of QIODevice object at 0x02C2EDA0>
obj.__hash__ = <method-wrapper '__hash__' of QIODevice object at 0x02C2EDA0>
obj.__init__ = <method-wrapper '__init__' of QIODevice object at 0x02C2EDA0>
obj.__module__ = PyQt4.QtCore
obj.__new__ = <built-in method __new__ of sip.wrappertype object at 0x5F4232B0>
obj.__reduce__ = <built-in method __reduce__ of QIODevice object at 0x02C2EDA0>
obj.__reduce_ex__ = <built-in method __reduce_ex__ of QIODevice object at 0x02C2EDA0>
obj.__repr__ = <method-wrapper '__repr__' of QIODevice object at 0x02C2EDA0>
obj.__setattr__ = <method-wrapper '__setattr__' of QIODevice object at 0x02C2EDA0>
obj.__sizeof__ = <built-in method __sizeof__ of QIODevice object at 0x02C2EDA0>
obj.__str__ = <method-wrapper '__str__' of QIODevice object at 0x02C2EDA0>
obj.__subclasshook__ = <built-in method __subclasshook__ of PyQt4.QtCore.pyqtWrapperType object at 0x02386968>
obj.__weakref__ = None
obj.aboutToClose = <bound signal aboutToClose of QIODevice object at 0x02C2EDA0>
obj.atEnd = <built-in method atEnd of QIODevice object at 0x02C2EDA0>
obj.blockSignals = <built-in method blockSignals of QIODevice object at 0x02C2EDA0>
obj.bytesAvailable = <built-in method bytesAvailable of QIODevice object at 0x02C2EDA0>
obj.bytesToWrite = <built-in method bytesToWrite of QIODevice object at 0x02C2EDA0>
obj.bytesWritten = <bound signal bytesWritten of QIODevice object at 0x02C2EDA0>
obj.canReadLine = <built-in method canReadLine of QIODevice object at 0x02C2EDA0>
obj.childEvent = <built-in method childEvent of QIODevice object at 0x02C2EDA0>
obj.children = <built-in method children of QIODevice object at 0x02C2EDA0>
obj.close = <built-in method close of QIODevice object at 0x02C2EDA0>
obj.connect = <built-in method connect of QIODevice object at 0x02C2EDA0>
obj.connectNotify = <built-in method connectNotify of QIODevice object at 0x02C2EDA0>
obj.customEvent = <built-in method customEvent of QIODevice object at 0x02C2EDA0>
obj.deleteLater = <built-in method deleteLater of QIODevice object at 0x02C2EDA0>
obj.destroyed = <bound signal destroyed of QIODevice object at 0x02C2EDA0>
obj.disconnect = <built-in method disconnect of QIODevice object at 0x02C2EDA0>
obj.disconnectNotify = <built-in method disconnectNotify of QIODevice object at 0x02C2EDA0>
obj.dumpObjectInfo = <built-in method dumpObjectInfo of QIODevice object at 0x02C2EDA0>
obj.dumpObjectTree = <built-in method dumpObjectTree of QIODevice object at 0x02C2EDA0>
obj.dynamicPropertyNames = <built-in method dynamicPropertyNames of QIODevice object at 0x02C2EDA0>
obj.emit = <built-in method emit of QIODevice object at 0x02C2EDA0>
obj.errorString = <built-in method errorString of QIODevice object at 0x02C2EDA0>
obj.event = <built-in method event of QIODevice object at 0x02C2EDA0>
obj.eventFilter = <built-in method eventFilter of QIODevice object at 0x02C2EDA0>
obj.findChild = <built-in method findChild of QIODevice object at 0x02C2EDA0>
obj.findChildren = <built-in method findChildren of QIODevice object at 0x02C2EDA0>
obj.getChar = <built-in method getChar of QIODevice object at 0x02C2EDA0>
obj.inherits = <built-in method inherits of QIODevice object at 0x02C2EDA0>
obj.installEventFilter = <built-in method installEventFilter of QIODevice object at 0x02C2EDA0>
obj.isOpen = <built-in method isOpen of QIODevice object at 0x02C2EDA0>
obj.isReadable = <built-in method isReadable of QIODevice object at 0x02C2EDA0>
obj.isSequential = <built-in method isSequential of QIODevice object at 0x02C2EDA0>
obj.isTextModeEnabled = <built-in method isTextModeEnabled of QIODevice object at 0x02C2EDA0>
obj.isWidgetType = <built-in method isWidgetType of QIODevice object at 0x02C2EDA0>
obj.isWritable = <built-in method isWritable of QIODevice object at 0x02C2EDA0>
obj.killTimer = <built-in method killTimer of QIODevice object at 0x02C2EDA0>
obj.metaObject = <built-in method metaObject of QIODevice object at 0x02C2EDA0>
obj.moveToThread = <built-in method moveToThread of QIODevice object at 0x02C2EDA0>
obj.objectName = <built-in method objectName of QIODevice object at 0x02C2EDA0>
obj.open = <built-in method open of QIODevice object at 0x02C2EDA0>
obj.openMode = <built-in method openMode of QIODevice object at 0x02C2EDA0>
obj.parent = <built-in method parent of QIODevice object at 0x02C2EDA0>
obj.peek = <built-in method peek of QIODevice object at 0x02C2EDA0>
obj.pos = <built-in method pos of QIODevice object at 0x02C2EDA0>
obj.property = <built-in method property of QIODevice object at 0x02C2EDA0>
obj.putChar = <built-in method putChar of QIODevice object at 0x02C2EDA0>
obj.pyqtConfigure = <built-in method pyqtConfigure of QIODevice object at 0x02C2EDA0>
obj.read = <built-in method read of QIODevice object at 0x02C2EDA0>
obj.readAll = <built-in method readAll of QIODevice object at 0x02C2EDA0>
obj.readChannelFinished = <bound signal readChannelFinished of QIODevice object at 0x02C2EDA0>
obj.readData = <built-in method readData of QIODevice object at 0x02C2EDA0>
obj.readLine = <built-in method readLine of QIODevice object at 0x02C2EDA0>
obj.readLineData = <built-in method readLineData of QIODevice object at 0x02C2EDA0>
obj.readyRead = <bound signal readyRead of QIODevice object at 0x02C2EDA0>
obj.receivers = <built-in method receivers of QIODevice object at 0x02C2EDA0>
obj.removeEventFilter = <built-in method removeEventFilter of QIODevice object at 0x02C2EDA0>
obj.reset = <built-in method reset of QIODevice object at 0x02C2EDA0>
obj.seek = <built-in method seek of QIODevice object at 0x02C2EDA0>
obj.sender = <built-in method sender of QIODevice object at 0x02C2EDA0>
obj.senderSignalIndex = <built-in method senderSignalIndex of QIODevice object at 0x02C2EDA0>
obj.setErrorString = <built-in method setErrorString of QIODevice object at 0x02C2EDA0>
obj.setObjectName = <built-in method setObjectName of QIODevice object at 0x02C2EDA0>
obj.setOpenMode = <built-in method setOpenMode of QIODevice object at 0x02C2EDA0>
obj.setParent = <built-in method setParent of QIODevice object at 0x02C2EDA0>
obj.setProperty = <built-in method setProperty of QIODevice object at 0x02C2EDA0>
obj.setTextModeEnabled = <built-in method setTextModeEnabled of QIODevice object at 0x02C2EDA0>
obj.signalsBlocked = <built-in method signalsBlocked of QIODevice object at 0x02C2EDA0>
obj.size = <built-in method size of QIODevice object at 0x02C2EDA0>
obj.startTimer = <built-in method startTimer of QIODevice object at 0x02C2EDA0>
obj.staticMetaObject = <PyQt4.QtCore.QMetaObject object at 0x02C4E330>
obj.thread = <built-in method thread of QIODevice object at 0x02C2EDA0>
obj.timerEvent = <built-in method timerEvent of QIODevice object at 0x02C2EDA0>
obj.tr = <built-in method tr of QIODevice object at 0x02C2EDA0>
obj.trUtf8 = <built-in method trUtf8 of QIODevice object at 0x02C2EDA0>
obj.ungetChar = <built-in method ungetChar of QIODevice object at 0x02C2EDA0>
obj.waitForBytesWritten = <built-in method waitForBytesWritten of QIODevice object at 0x02C2EDA0>
obj.waitForReadyRead = <built-in method waitForReadyRead of QIODevice object at 0x02C2EDA0>
obj.write = <built-in method write of QIODevice object at 0x02C2EDA0>
obj.writeData = <built-in method writeData of QIODevice object at 0x02C2EDA0>