environment/lib/python2.7/site-packages/IPython/zmq/kernelmanager.py
def _poll(self, start_time):
        """poll for heartbeat replies until we reach self.time_to_dead
        
        Ignores interrupts, and returns the result of poll(), which
        will be an empty list if no messages arrived before the timeout,
        or the event tuple if there is a message to receive.
        """
        
        until_dead = self.time_to_dead - (time.time() - start_time)
        # ensure poll at least once
        until_dead = max(until_dead, 1e-3)
        events = []
        while True:
            try:
                events = self.poller.poll(1000 * until_dead)
            except ZMQError as e:
                if e.errno == errno.EINTR:
                    # ignore interrupts during heartbeat
                    # this may never actually happen
                    until_dead = self.time_to_dead - (time.time() - start_time)
                    until_dead = max(until_dead, 1e-3)
                    pass
                else:
                    raise
            except Exception:
                if self._exiting:
                    break
                else:
                    raise
            else:
                break
        return events
def _poll(self, start_time):
        """poll for heartbeat replies until we reach self.time_to_dead
        
        Ignores interrupts, and returns the result of poll(), which
        will be an empty list if no messages arrived before the timeout,
        or the event tuple if there is a message to receive.
        """
        
        until_dead = self.time_to_dead - (time.time() - start_time)
        # ensure poll at least once
        until_dead = max(until_dead, 1e-3)
        events = []
        while True:
            try:
                events = self.poller.poll(1000 * until_dead)
            except ZMQError as e:
                if e.errno == errno.EINTR:
                    # ignore interrupts during heartbeat
                    # this may never actually happen
                    until_dead = self.time_to_dead - (time.time() - start_time)
                    until_dead = max(until_dead, 1e-3)
                    pass
                else:
                    raise
            except Exception:
                if self._exiting:
                    break
                else:
                    raise
            else:
                break
        return events
def _poll ( self , start_time ) : until_dead = self . time_to_dead - ( time . time ( ) - start_time ) # ensure poll at least once until_dead = max ( until_dead , 1e-3 ) events = [ ] while True : try : events = self . poller . poll ( 1000 * until_dead ) except ZMQError as e : if e . errno == errno . EINTR : # ignore interrupts during heartbeat # this may never actually happen until_dead = self . time_to_dead - ( time . time ( ) - start_time ) until_dead = max ( until_dead , 1e-3 ) pass else : raise except Exception : if self . _exiting : break else : raise else : break return events
poll for heartbeat replies until we reach self.time_to_dead
        
        Ignores interrupts, and returns the result of poll(), which
        will be an empty list if no messages arrived before the timeout,
        or the event tuple if there is a message to receive.
poll for heartbeat replies until we reach self . time_to_dead Ignores interrupts and returns the result of poll () which will be an empty list if no messages arrived before the timeout or the event tuple if there is a message to receive .