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

Live updates for children automatically change container views....

Live updates for children automatically change container views. Since traitlets does not trigger events when list elements are changed, these changes are triggered only when the entire children element is reassigned.

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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				"""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)))