upstream/ipython Files · IPython/quarantine/ipy_signals.py

Multiple improvements to tab completion....

Multiple improvements to tab completion. I refactored the API quite a bit, to retain readline compatibility but make it more independent of readline. There's still more to do in cleaning up our init_readline() method, but now the completer objects have separate rlcomplete() and complete() methods. The former uses the quirky readline API with a state flag, while the latter is stateless, takes only text information, and is more suitable for GUIs and other frontends to call programatically. Made other minor fixes to ensure the test suite passes in full. While all this code is a bit messy, we're getting in the direction of the APIs we need in the long run.

Brian Granger - - Load All Authors

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      """ Advanced signal (e.g. ctrl+C) handling for IPython

      So far, this only ignores ctrl + C in IPython file a subprocess

      is executing, to get closer to how a "proper" shell behaves.

      Other signal processing may be implemented later on.

      If _ip.options.verbose is true, show exit status if nonzero

      """

      import signal,os,sys

      from IPython.core import ipapi

      import subprocess

      ip = ipapi.get()

      def new_ipsystem_posix(cmd):

          """ ctrl+c ignoring replacement for system() command in iplib.

          Ignore ctrl + c in IPython process during the command execution. 

          The subprocess will still get the ctrl + c signal.

          posix implementation

          """

          p =  subprocess.Popen(cmd, shell = True)

          old_handler = signal.signal(signal.SIGINT, signal.SIG_IGN)

          pid,status = os.waitpid(p.pid,0)

          signal.signal(signal.SIGINT, old_handler)

          if status and ip.options.verbose:

              print "[exit status: %d]" % status

      def new_ipsystem_win32(cmd):    

          """ ctrl+c ignoring replacement for system() command in iplib.

          Ignore ctrl + c in IPython process during the command execution. 

          The subprocess will still get the ctrl + c signal.

          win32 implementation

          """

          old_handler = signal.signal(signal.SIGINT, signal.SIG_IGN)

          status = os.system(cmd)

          signal.signal(signal.SIGINT, old_handler)

          if status and ip.options.verbose:

              print "[exit status: %d]" % status

      def init():

          o = ip.options

          try:

              o.verbose

          except AttributeError:

              o.allow_new_attr (True )

              o.verbose = 0

          ip.system = (sys.platform == 'win32' and new_ipsystem_win32 or 

                          new_ipsystem_posix)

      init()

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				""" Advanced signal (e.g. ctrl+C) handling for IPython

				So far, this only ignores ctrl + C in IPython file a subprocess
				is executing, to get closer to how a "proper" shell behaves.

				Other signal processing may be implemented later on.

				If _ip.options.verbose is true, show exit status if nonzero

				"""

				import signal,os,sys
				from IPython.core import ipapi
				import subprocess

				ip = ipapi.get()

				def new_ipsystem_posix(cmd):
				""" ctrl+c ignoring replacement for system() command in iplib.

				Ignore ctrl + c in IPython process during the command execution.
				The subprocess will still get the ctrl + c signal.

				posix implementation
				"""

				p = subprocess.Popen(cmd, shell = True)

				old_handler = signal.signal(signal.SIGINT, signal.SIG_IGN)
				pid,status = os.waitpid(p.pid,0)
				signal.signal(signal.SIGINT, old_handler)
				if status and ip.options.verbose:
				print "[exit status: %d]" % status

				def new_ipsystem_win32(cmd):
				""" ctrl+c ignoring replacement for system() command in iplib.

				Ignore ctrl + c in IPython process during the command execution.
				The subprocess will still get the ctrl + c signal.

				win32 implementation
				"""
				old_handler = signal.signal(signal.SIGINT, signal.SIG_IGN)
				status = os.system(cmd)
				signal.signal(signal.SIGINT, old_handler)
				if status and ip.options.verbose:
				print "[exit status: %d]" % status


				def init():
				o = ip.options
				try:
				o.verbose
				except AttributeError:
				o.allow_new_attr (True )
				o.verbose = 0

				ip.system = (sys.platform == 'win32' and new_ipsystem_win32 or
				new_ipsystem_posix)

				init()