upstream/ipython Files · IPython/zmq/heartbeat.py

inputhook: disable CTRL+C when a hook is active....

inputhook: disable CTRL+C when a hook is active. On systems with 'readline', it's very likely to intercept a signal during a select() call. The default SIGINT handler will schedule a KeyboardInterrupt exception to be raised as soon as possible. If ctypes is used to install a Python callback for PyOS_InputHook, this will happen as soon as the bytecode execution starts, so even if the first instruction of the callback is a `try: ... except KeyboardInterrupt` clause, it's actually too late. As ctypes doesn't allow a Python callback to raise an exception, this ends up with IPython detecting an internal error... not pretty. We must therefore ignore the SIGINT signals until we are sure the exception handler is active, in the Python callback.

MinRK - - Load All Authors

File last commit:

r4500:79472ea0


                r4944:0fc80df3

Download file

             heartbeat.py
        
                    49 lines
            
             | 1.5 KiB
            
                | text/x-python
            
             |
                PythonLexer
            
             / IPython / zmq / heartbeat.py
          
                    History
                
                 |
                  Annotation
                 | Raw
                 |Copy content
                 |Copy permalink

      """The client and server for a basic ping-pong style heartbeat.

      """

      #-----------------------------------------------------------------------------

      #  Copyright (C) 2008-2010  The IPython Development Team

      #

      #  Distributed under the terms of the BSD License.  The full license is in

      #  the file COPYING, distributed as part of this software.

      #-----------------------------------------------------------------------------

      #-----------------------------------------------------------------------------

      # Imports

      #-----------------------------------------------------------------------------

      import socket

      import sys

      from threading import Thread

      import zmq

      from IPython.utils.localinterfaces import LOCALHOST

      #-----------------------------------------------------------------------------

      # Code

      #-----------------------------------------------------------------------------

      class Heartbeat(Thread):

          "A simple ping-pong style heartbeat that runs in a thread."

          def __init__(self, context, addr=(LOCALHOST, 0)):

              Thread.__init__(self)

              self.context = context

              self.addr = addr

              self.ip = addr[0]

              self.port = addr[1]

              if self.port == 0:

                  s = socket.socket()

                  s.bind(self.addr)

                  self.port = s.getsockname()[1]

                  s.close()

                  self.addr = (self.ip, self.port)

              self.daemon = True

          def run(self):

              self.socket = self.context.socket(zmq.REP)

              self.socket.bind('tcp://%s:%i' % self.addr)

              zmq.device(zmq.FORWARDER, self.socket, self.socket)

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

				"""The client and server for a basic ping-pong style heartbeat.
				"""

				#-----------------------------------------------------------------------------
				# Copyright (C) 2008-2010 The IPython Development Team
				#
				# Distributed under the terms of the BSD License. The full license is in
				# the file COPYING, distributed as part of this software.
				#-----------------------------------------------------------------------------

				#-----------------------------------------------------------------------------
				# Imports
				#-----------------------------------------------------------------------------

				import socket
				import sys
				from threading import Thread

				import zmq

				from IPython.utils.localinterfaces import LOCALHOST

				#-----------------------------------------------------------------------------
				# Code
				#-----------------------------------------------------------------------------


				class Heartbeat(Thread):
				"A simple ping-pong style heartbeat that runs in a thread."

				def __init__(self, context, addr=(LOCALHOST, 0)):
				Thread.__init__(self)
				self.context = context
				self.addr = addr
				self.ip = addr[0]
				self.port = addr[1]
				if self.port == 0:
				s = socket.socket()
				s.bind(self.addr)
				self.port = s.getsockname()[1]
				s.close()
				self.addr = (self.ip, self.port)
				self.daemon = True

				def run(self):
				self.socket = self.context.socket(zmq.REP)
				self.socket.bind('tcp://%s:%i' % self.addr)
				zmq.device(zmq.FORWARDER, self.socket, self.socket)