environment/lib/python2.7/site-packages/IPython/frontend/html/notebook/handlers.py
def _really_start_hb(self):
        """callback for delayed heartbeat start
        
        Only start the hb loop if we haven't been closed during the wait.
        """
        if self._beating and not self.hb_stream.closed():
            self._hb_periodic_callback.start()
def _really_start_hb(self):
        if self._beating and not self.hb_stream.closed():
            self._hb_periodic_callback.start()
def _really_start_hb ( self ) : if self . _beating and not self . hb_stream . closed ( ) : self . _hb_periodic_callback . start ( )
callback for delayed heartbeat start
        
        Only start the hb loop if we haven't been closed during the wait.
callback for delayed heartbeat start Only start the hb loop if we haven t been closed during the wait .