def parse(filename=None, factory=None): if filename is None or factory is None: return _, p = new_parser() print " \n\n\n zrobioby nowy parser" print "1: ", _ print "2: ", p p.factory = factory p.modelStack = [] p.modelStack2 = [] res = None try: filename = os.path.realpath(filename) f = open(filename) #print f.read() print "\n\n\n otwprzylem plik w try" res = yacc.parse(f.read()) #nie bylo tracking=True, dodalem #for i in res: # print "res i: ", i print "\n\n SPARSOWALEMW TRY! \n" print "\n RES: ", res except: print "\n\n NIE SPARSOWALEM W TRY" log = Logger('JDraw Parser') #print "\n\n LOG1: ", log, "\n\n\n stop" log.warning("Failed to parse %s" % filename) #print "\n\n exec info: ?" log.debug("Details:", exc_info=1) return res
def parse(filename=None, factory=None): if filename is None or factory is None: return _, p = new_parser() p.factory = factory p.modelStack = [] p.modelStack2 = [] res = None try: filename = os.path.realpath(filename) f = open(filename) res = yacc.parse(f.read()) except: log = Logger('JDraw Parser') log.warning("Failed to parse %s" % filename) log.debug("Details:", exc_info=1) return res
class TaurusEmitterThread(Qt.QThread): """ The TaurusEmitterThread Class ========================== This object get items from a python Queue and performs a thread safe operation on them. It is useful to serialize Qt tasks in a background thread. :param parent: a Qt/Taurus object :param name: identifies object logs :param queue: if None parent.getQueue() is used, if not then the queue passed as argument is used :param method: the method to be executed using each queue item as argument :param cursor: if True or QCursor a custom cursor is set while the Queue is not empty How TaurusEmitterThread works -------------------------- TaurusEmitterThread is a worker thread that processes a queue of iterables passed as arguments to the specified method every time that ``doSomething()`` is called: * ``self.method(*item)`` will be called if TaurusEmitterThread.method has been initialized. * ``item[0](item[1:])`` will be called if ``method`` is not initialized and the first element of the queued iterable is *callable*. TaurusEmitterThread uses two queues: * ``self.queue`` manages the objects added externally: + the ``next()`` method passes objects from ``self.queue`` to ``self.todo queue`` + every time that a *somethingDone* signal arrives ``next()`` is called. + ``next()`` can be called also externally to ensure that the main queue is being processed. + the queue can be accessed externally using ``getQueue()`` + ``getQueue().qsize()`` returns number of remaining objects in queue. + while there are objects in queue the ``.next()`` method will override applications cursor. a call to ``next()`` with an empty queue will restore the original cursor. * ``self.todo`` is managed by the ``run()/start()`` method: - a loop waits continuously for new objects in ``self.todo`` queue. - if an object is found, it is sent in a *doSomething* signal. - if *"exit"* is found the loop exits. Usage example ------------- .. code-block:: python #Applying TaurusEmitterThread to an existing class: from queue import Queue from functools import partial def modelSetter(args): obj,model = args[0],args[1] obj.setModel(model) klass TaurusGrid(Qt.QFrame, TaurusBaseWidget): ... def __init__(self, parent = None, designMode = False): ... self.modelsQueue = Queue() self.modelsThread = TaurusEmitterThread(parent=self, queue=self.modelsQueue,method=modelSetter ) ... def build_widgets(...): ... previous,synoptic_value = \ synoptic_value,TaurusValue(cell_frame) #synoptic_value.setModel(model) self.modelsQueue.put((synoptic_value,model)) ... def setModel(self,model): ... if hasattr(self,'modelsThread') and \ not self.modelsThread.isRunning(): self.modelsThread.start() elif self.modelsQueue.qsize(): self.modelsThread.next() ... """ def __init__(self, parent=None, name='', queue=None, method=None, cursor=None, sleep=5000, polling=0, loopwait=5): """ Parent must be not None and must be a TaurusGraphicsScene! :param queue: pass an external action queue (optional) :param method: action processor (e.g. modelSetter) :param cursor: QCursor during process (optional) :param sleep: delay in ms before thread start :param polling: process actions at fix period (milliseconds) :param loopwait: wait N milliseconds between actions """ Qt.QThread.__init__(self, parent) self.name = name self.log = Logger('TaurusEmitterThread(%s)' % self.name) self.log.setLogLevel(self.log.Info) self.queue = queue or Queue() self.todo = Queue() self.method = method self.cursor = Qt.QCursor( Qt.Qt.WaitCursor) if cursor is True else cursor self._cursor = False self.timewait = int(sleep) self.polling = int(polling) self.loopwait = int(loopwait) if self.polling: self.refreshTimer = Qt.QTimer() self.refreshTimer.timeout.connect(self.onRefresh) else: self.refreshTimer = None self.emitter = QEmitter() self.emitter.moveToThread(Qt.QApplication.instance().thread()) # Mandatory!!! if parent is set before changing thread it could lead to # segFaults! self.emitter.setParent(Qt.QApplication.instance()) self._done = 0 # Moved to the end to prevent segfaults ... self.emitter.doSomething.connect(self._doSomething) if not self.refreshTimer: self.emitter.somethingDone.connect(self.next) def onRefresh(self): try: size = self.getQueue().qsize() if size: self.log.info('onRefresh(%s)' % size) self.next() else: self.log.debug('onRefresh()') except: self.log.warning(traceback.format_exc()) def getQueue(self): if self.queue: return self.queue elif hasattr(self.parent(), 'getQueue'): self.parent().getQueue() else: return None def getDone(self): """ Returns % of done tasks in 0-1 range """ pending = self.getQueue().qsize() return float(self._done) / (self._done + pending) def clear(self): while not self.todo.empty(): self.todo.get() while not self.getQueue().empty(): self.getQueue().get() self._done += 1 def purge(self, obj): """ Remove a given object from all queues """ nqueue = Queue() while not self.todo.empty(): i = self.todo.get() if obj not in i: nqueue.put(i) while not self.queue.empty(): i = self.queue.get() if obj not in i: nqueue.put(i) while not nqueue.empty(): self.queue.put(nqueue.get()) self.next() def _doSomething(self, params): self.log.debug('At TaurusEmitterThread._doSomething(%s)' % str(params)) if not self.method: method, args = params[0], params[1:] else: method, args = self.method, params if method: try: method(*args) except: self.log.error( 'At TaurusEmitterThread._doSomething(%s): \n%s' % (list(map(str, args)), traceback.format_exc())) self.emitter.somethingDone.emit() self._done += 1 return def next(self): queue = self.getQueue() msg = ('At TaurusEmitterThread.next(), %d items remaining.' % queue.qsize()) if (queue.empty() and not self.polling): self.log.info(msg) else: self.log.debug(msg) try: if not queue.empty(): if not self._cursor and self.cursor is not None: Qt.QApplication.instance().setOverrideCursor( Qt.QCursor(self.cursor)) self._cursor = True # A blocking get here would hang the GUIs!!! item = queue.get(False) self.todo.put(item) self.log.debug('Item added to todo queue: %s' % str(item)) elif self._cursor: Qt.QApplication.instance().restoreOverrideCursor() self._cursor = False except Empty: self.log.warning(traceback.format_exc()) pass except: self.log.warning(traceback.format_exc()) return def run(self): Qt.QApplication.instance().thread().msleep(self.timewait) self.log.info('#' * 80) self.log.info('At TaurusEmitterThread.run()') self.next() if self.refreshTimer: self.refreshTimer.start(self.polling) while True: self.log.debug('At TaurusEmitterThread.run() loop.') item = self.todo.get(True) if isString(item): if item == "exit": break else: continue self.log.debug('Emitting doSomething signal ...') self.emitter.doSomething.emit(item) if self.loopwait: self.msleep(self.loopwait) # End of while self.log.info('#' * 80 + '\nOut of TaurusEmitterThread.run()' + '\n' + '#' * 80)
class TaurusEmitterThread(Qt.QThread): """ The TaurusEmitterThread Class ========================== This object get items from a python Queue and performs a thread safe operation on them. It is useful to serialize Qt tasks in a background thread. :param parent: a Qt/Taurus object :param name: identifies object logs :param queue: if None parent.getQueue() is used, if not then the queue passed as argument is used :param method: the method to be executed using each queue item as argument :param cursor: if True or QCursor a custom cursor is set while the Queue is not empty How TaurusEmitterThread works -------------------------- TaurusEmitterThread is a worker thread that processes a queue of iterables passed as arguments to the specified method every time that ``doSomething()`` is called: * ``self.method(*item)`` will be called if TaurusEmitterThread.method has been initialized. * ``item[0](item[1:])`` will be called if ``method`` is not initialized and the first element of the queued iterable is *callable*. TaurusEmitterThread uses two queues: * ``self.queue`` manages the objects added externally: + the ``next()`` method passes objects from ``self.queue`` to ``self.todo queue`` + every time that a *somethingDone* signal arrives ``next()`` is called. + ``next()`` can be called also externally to ensure that the main queue is being processed. + the queue can be accessed externally using ``getQueue()`` + ``getQueue().qsize()`` returns the number of remaining objects in queue. + while there are objects in queue the ``.next()`` method will override applications cursor. a call to ``next()`` with an empty queue will restore the original cursor. * ``self.todo`` is managed by the ``run()/start()`` method: - a loop waits continuously for new objects in ``self.todo`` queue. - if an object is found, it is sent in a *doSomething* signal. - if *"exit"* is found the loop exits. Usage example ------------- .. code-block:: python #Applying TaurusEmitterThread to an existing class: import Queue from functools import partial def modelSetter(args): obj,model = args[0],args[1] obj.setModel(model) klass TaurusGrid(Qt.QFrame, TaurusBaseWidget): ... def __init__(self, parent = None, designMode = False): ... self.modelsQueue = Queue.Queue() self.modelsThread = TaurusEmitterThread(parent=self,queue=self.modelsQueue,method=modelSetter ) ... def build_widgets(...): ... previous,synoptic_value = synoptic_value,TaurusValue(cell_frame) #synoptic_value.setModel(model) self.modelsQueue.put((synoptic_value,model)) ... def setModel(self,model): ... if hasattr(self,'modelsThread') and not self.modelsThread.isRunning(): self.modelsThread.start() elif self.modelsQueue.qsize(): self.modelsThread.next() ... """ def __init__(self, parent=None, name='', queue=None, method=None, cursor=None, sleep=5000): """ Parent most not be None and must be a TaurusGraphicsScene! """ Qt.QThread.__init__(self, parent) self.name = name self.log = Logger('TaurusEmitterThread(%s)' % self.name) self.log.setLogLevel(self.log.Info) self.queue = queue or Queue.Queue() self.todo = Queue.Queue() self.method = method self.cursor = Qt.QCursor( Qt.Qt.WaitCursor) if cursor is True else cursor self._cursor = False self.timewait = sleep self.emitter = QEmitter() self.emitter.moveToThread(Qt.QApplication.instance().thread()) # Mandatory!!! if parent is set before changing thread it could lead to # segFaults! self.emitter.setParent(Qt.QApplication.instance()) self._done = 0 # Moved to the end to prevent segfaults ... self.emitter.doSomething.connect(self._doSomething) self.emitter.somethingDone.connect(self.next) def getQueue(self): if self.queue: return self.queue elif hasattr(self.parent(), 'getQueue'): self.parent().getQueue() else: return None def getDone(self): """ Returns % of done tasks in 0-1 range """ return self._done / (self._done + self.getQueue().qsize()) if self._done else 0. def clear(self): while not self.todo.empty(): self.todo.get() while not self.getQueue().empty(): self.getQueue().get() self._done += 1 def purge(obj): nqueue = Queue.Queue() while not self.todo.empty(): i = self.todo.get() if obj not in i: nqueue.put(i) while not self.queue.empty(): i = self.queue.get() if obj not in i: nqueue.put(i) while not nqueue.empty(): self.queue.put(nqueue.get()) self.next() def _doSomething(self, params): self.log.debug('At TaurusEmitterThread._doSomething(%s)' % str(params)) if not self.method: method, args = params[0], params[1:] else: method, args = self.method, params if method: try: method(*args) except: self.log.error('At TaurusEmitterThread._doSomething(%s): \n%s' % ( map(str, args), traceback.format_exc())) self.emitter.somethingDone.emit() self._done += 1 return def next(self): queue = self.getQueue() msg = 'At TaurusEmitterThread.next(), %d items remaining.' % queue.qsize() (queue.empty() and self.log.info or self.log.debug)(msg) try: if not queue.empty(): if not self._cursor and self.cursor is not None: Qt.QApplication.instance().setOverrideCursor(Qt.QCursor(self.cursor)) self._cursor = True # A blocking get here would hang the GUIs!!! item = queue.get(False) self.todo.put(item) self.log.debug('Item added to todo queue: %s' % str(item)) elif self._cursor: Qt.QApplication.instance().restoreOverrideCursor() self._cursor = False except Queue.Empty: self.log.warning(traceback.format_exc()) pass except: self.log.warning(traceback.format_exc()) return def run(self): Qt.QApplication.instance().thread().sleep(int(self.timewait / 1000) if self.timewait > 10 else int(self.timewait)) # wait(self.sleep) self.log.info('#' * 80) self.log.info('At TaurusEmitterThread.run()') self.next() while True: self.log.debug('At TaurusEmitterThread.run() loop.') item = self.todo.get(True) if isString(item): if item == "exit": break else: continue self.log.debug('Emitting doSomething signal ...') self.emitter.doSomething.emit(item) # End of while self.log.info( '#' * 80 + '\nOut of TaurusEmitterThread.run()' + '\n' + '#' * 80)