upstream/ipython Files · IPython/rlineimpl.py

Protect against absent global IPython instance....

Protect against absent global IPython instance. This basically applies most of the changes to ultraTB made by Brian in the reorg branch here: http://bazaar.launchpad.net/~ipython-dev/ipython/module-reorg/revision/1225 To our duplicate copies of ultraTB (the duplication is already gone in the reorg branch). This now means that the trial-based tests run fine if executed as trial IPython OR trial IPython.kernel where as the latter form was failing before. The reason why the former used to work was that a hidden global ipython is created, *upon import*, by ipdoctest. That will stay for now, but I've made it bug https://bugs.launchpad.net/ipython/+bug/409096 marked as critical for 0.11 that I'll need to fix.

Fernando Perez - - Load All Authors

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             rlineimpl.py
        
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      # -*- coding: utf-8 -*-

      """ Imports and provides the 'correct' version of readline for the platform.

      Readline is used throughout IPython as 'import IPython.rlineimpl as readline'.

      In addition to normal readline stuff, this module provides have_readline

      boolean and _outputfile variable used in genutils.

      """

      import sys

      try:

          from readline import *

          import readline as _rl

          have_readline = True

      except ImportError:

          try:

              from pyreadline import *

              import pyreadline as _rl

              have_readline = True

          except ImportError:    

              have_readline = False

      if sys.platform == 'win32' and have_readline:

          try:

              _outputfile=_rl.GetOutputFile()

          except AttributeError:

              print "Failed GetOutputFile"

              have_readline = False

      # Test to see if libedit is being used instead of GNU readline.

      # Thanks to Boyd Waters for this patch.

      uses_libedit = False

      if sys.platform == 'darwin' and have_readline:

          import commands

          (status, result) = commands.getstatusoutput( "otool -L %s | grep libedit" % _rl.__file__ )

          if status == 0 and len(result) > 0:

              # we are bound to libedit - new in Leopard

              _rl.parse_and_bind("bind ^I rl_complete")

              print "Leopard libedit detected."

              uses_libedit = True

      # the clear_history() function was only introduced in Python 2.4 and is

      # actually optional in the readline API, so we must explicitly check for its

      # existence.  Some known platforms actually don't have it.  This thread:

      # http://mail.python.org/pipermail/python-dev/2003-August/037845.html

      # has the original discussion.

      if have_readline:

          try:

              _rl.clear_history

          except AttributeError:

              def clear_history(): pass

              _rl.clear_history = clear_history

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				# -- coding: utf-8 --
				""" Imports and provides the 'correct' version of readline for the platform.

				Readline is used throughout IPython as 'import IPython.rlineimpl as readline'.

				In addition to normal readline stuff, this module provides have_readline
				boolean and _outputfile variable used in genutils.
				"""

				import sys

				try:
				from readline import *
				import readline as _rl
				have_readline = True
				except ImportError:
				try:
				from pyreadline import *
				import pyreadline as _rl
				have_readline = True
				except ImportError:
				have_readline = False

				if sys.platform == 'win32' and have_readline:
				try:
				_outputfile=_rl.GetOutputFile()
				except AttributeError:
				print "Failed GetOutputFile"
				have_readline = False

				# Test to see if libedit is being used instead of GNU readline.
				# Thanks to Boyd Waters for this patch.
				uses_libedit = False
				if sys.platform == 'darwin' and have_readline:
				import commands
				(status, result) = commands.getstatusoutput( "otool -L %s \| grep libedit" % _rl.__file__ )
				if status == 0 and len(result) > 0:
				# we are bound to libedit - new in Leopard
				_rl.parse_and_bind("bind ^I rl_complete")
				print "Leopard libedit detected."
				uses_libedit = True


				# the clear_history() function was only introduced in Python 2.4 and is
				# actually optional in the readline API, so we must explicitly check for its
				# existence. Some known platforms actually don't have it. This thread:
				# http://mail.python.org/pipermail/python-dev/2003-August/037845.html
				# has the original discussion.

				if have_readline:
				try:
				_rl.clear_history
				except AttributeError:
				def clear_history(): pass
				_rl.clear_history = clear_history