upstream/ipython Files · IPython/testing/plugin/show_refs.py

Allow run_line_magic to be called from scripts...

Allow run_line_magic to be called from scripts Don't blow up if looking back up the stack trace fails. Reported on rpy2: https://bitbucket.org/lgautier/rpy2/issue/184 /valueerror-call-stack-is-not-deep-enough

Thomas Kluyver - - Load All Authors

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             show_refs.py
        
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      """Simple script to show reference holding behavior.

      This is used by a companion test case.

      """

      from __future__ import print_function

      import gc

      class C(object):

         def __del__(self):

            pass

            #print 'deleting object...'  # dbg

      if __name__ == '__main__':

         c = C()

         c_refs = gc.get_referrers(c)

         ref_ids = list(map(id,c_refs))

         print('c referrers:',list(map(type,c_refs)))

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n g	New gist page

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t s	Toggle sidebar on some pages

				"""Simple script to show reference holding behavior.

				This is used by a companion test case.
				"""
				from __future__ import print_function

				import gc

				class C(object):
				def __del__(self):
				pass
				#print 'deleting object...' # dbg

				if __name__ == '__main__':
				c = C()

				c_refs = gc.get_referrers(c)
				ref_ids = list(map(id,c_refs))

				print('c referrers:',list(map(type,c_refs)))