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

disallow no-prefix `ipython foo=bar` argument style....

disallow no-prefix `ipython foo=bar` argument style. This style is in rc1, but will be removed in rc2. Since they don't match any flag pattern, rc1-style arguments will be interpreted by IPython as files to be run. So `ipython gui=foo -i` will exec gui=foo, and pass '-i' to gui=foo. Presumably this file won't exist, so there will be an error: Error in executing file in user namespace: gui=foo Assignments *must* have two leading '-', as in: ipython --foo=bar all flags (non-assignments) can be specified with one or two leading '-', as in: ipython -i --pylab -pdb --pprint script.py or ipython --i -pylab --pdb -pprint script.py but help only reports two-leading, as single-leading options will likely be removed on moving to argparse, where they will be replaced by single-letter aliases. The common remaining invalid option will be: ipython -foo=bar and a suggestion for 'did you mean --foo=bar'? will be presented in these cases.

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()