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

Manage and propagate argv correctly....

Manage and propagate argv correctly. All Application objects should take argv in their constructor, akin to how the standard signature of C programs is "main(int argc, char *argv)". This makes it possible to initialize them from code with different command-line options (otherwise, they end up directly accessing sys.argv[1:] via argparse).

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()