upstream/ipython Files · IPython/core/tests/refbug.py

Moving extensions to either quarantine or deathrow....

Moving extensions to either quarantine or deathrow. When a module is moved to quarantine, it means that while we intend to keep it, it is currently broken or sufficiently untested that it can't be in the main IPython codebase. To be moved back into the main IPython codebase a module must: 1. Work fully. 2. Have a test suite. 3. Be a proper IPython extension and tie into the official APIs. 3. Have members of the IPython dev team who are willing to maintain it. When a module is moved to deathrow, it means that the code is either broken and not worth repairing, deprecated, replaced by newer functionality, or code that should be developed and maintained by a third party.

Brian Granger - - Load All Authors

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      """Minimal script to reproduce our nasty reference counting bug.

      The problem is related to https://bugs.launchpad.net/ipython/+bug/269966

      The original fix for that appeared to work, but John D. Hunter found a

      matplotlib example which, when run twice in a row, would break.  The problem

      were references held by open figures to internals of Tkinter.

      This code reproduces the problem that John saw, without matplotlib.

      This script is meant to be called by other parts of the test suite that call it

      via %run as if it were executed interactively by the user.  As of 2009-04-13,

      test_magic.py calls it.

      """

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

      # Module imports

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

      import sys

      from IPython.core import ipapi

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

      # Globals

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

      ip = ipapi.get()

      if not '_refbug_cache' in ip.user_ns:

          ip.user_ns['_refbug_cache'] = []

      aglobal = 'Hello'

      def f():

          return aglobal

      cache = ip.user_ns['_refbug_cache']

      cache.append(f)

      def call_f():

          for func in cache:

              print 'lowercased:',func().lower()

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				"""Minimal script to reproduce our nasty reference counting bug.

				The problem is related to https://bugs.launchpad.net/ipython/+bug/269966

				The original fix for that appeared to work, but John D. Hunter found a
				matplotlib example which, when run twice in a row, would break. The problem
				were references held by open figures to internals of Tkinter.

				This code reproduces the problem that John saw, without matplotlib.

				This script is meant to be called by other parts of the test suite that call it
				via %run as if it were executed interactively by the user. As of 2009-04-13,
				test_magic.py calls it.
				"""

				#-----------------------------------------------------------------------------
				# Module imports
				#-----------------------------------------------------------------------------
				import sys

				from IPython.core import ipapi

				#-----------------------------------------------------------------------------
				# Globals
				#-----------------------------------------------------------------------------
				ip = ipapi.get()

				if not '_refbug_cache' in ip.user_ns:
				ip.user_ns['_refbug_cache'] = []


				aglobal = 'Hello'
				def f():
				return aglobal

				cache = ip.user_ns['_refbug_cache']
				cache.append(f)

				def call_f():
				for func in cache:
				print 'lowercased:',func().lower()