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

Merge pull request from tkf/dvipng...

Merge pull request from tkf/dvipng Use dvipng to format sympy.Matrix, enabling display of matrices in the Qt console with the sympy printing extension. Two changes are introduced: new dvipng backend is added to latex_to_png PNG formatter for sympy.Matrix uses the dvipng backend

Fernando Perez - - Load All Authors

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             show_refs.py
        
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             / IPython / testing / plugin / 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)