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

Proper error handling for nbformat versions in client code....

Proper error handling for nbformat versions in client code. 1. Users are warned when an older nbformat notebook is converted. 2. The notebook notifies the user when a notebook that is too new is attempted to load. To test these things, create a simple notebook. Then change its nbformat field by hand to 2 (to test 1) and then 4 (to test 2).

Fernando Perez - - 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.

      """

      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 = map(id,c_refs)

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

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				"""Simple script to show reference holding behavior.

				This is used by a companion test case.
				"""

				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 = map(id,c_refs)

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