upstream/ipython Files · IPython/utils/localinterfaces.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.

Bernardo B. Marques - - Load All Authors

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      """Simple utility for building a list of local IPs using the socket module.

      This module defines two constants:

      LOCALHOST : The loopback interface, or the first interface that points to this

                  machine.  It will *almost* always be '127.0.0.1'

      LOCAL_IPS : A list of IP addresses, loopback first, that point to this machine.

      """

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

      #  Copyright (C) 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

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

      # Code

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

      LOCAL_IPS = []

      try:

          LOCAL_IPS = socket.gethostbyname_ex('localhost')[2]

      except socket.gaierror:

          pass

      try:

          LOCAL_IPS.extend(socket.gethostbyname_ex(socket.gethostname())[2])

      except socket.gaierror:

          pass

      # include all-interface aliases: 0.0.0.0 and ''

      LOCAL_IPS.extend(['0.0.0.0', ''])

      LOCALHOST = LOCAL_IPS[0]

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				"""Simple utility for building a list of local IPs using the socket module.
				This module defines two constants:

				LOCALHOST : The loopback interface, or the first interface that points to this
				machine. It will almost always be '127.0.0.1'

				LOCAL_IPS : A list of IP addresses, loopback first, that point to this machine.
				"""
				#-----------------------------------------------------------------------------
				# Copyright (C) 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

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

				LOCAL_IPS = []
				try:
				LOCAL_IPS = socket.gethostbyname_ex('localhost')[2]
				except socket.gaierror:
				pass

				try:
				LOCAL_IPS.extend(socket.gethostbyname_ex(socket.gethostname())[2])
				except socket.gaierror:
				pass

				# include all-interface aliases: 0.0.0.0 and ''
				LOCAL_IPS.extend(['0.0.0.0', ''])

				LOCALHOST = LOCAL_IPS[0]