René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Evaluating operations outside the `with` block in Jupyter Notebook grows the `graph.operations` dict","articleBody":"This seem like a bug, and probably related to fact that I am running this in a `jupyter` notebook. Given this example:\r\n\r\n```python\r\nimport pythonflow as pf\r\n\r\nwith pf.Graph() as graph:\r\n    a = pf.constant(4, name='a')\r\n    b = pf.constant(38, name='b')\r\n    x = (a + b).set_name('x')\r\n```\r\n\r\nlooking at the `graph.operations` looks fine initially:\r\n\r\n```\r\n{'a': \u003cpf.func_op 'a' target=\u003cfunction identity at 0x106500310\u003e args=\u003c1 items\u003e kwargs=\u003c0 items\u003e\u003e,\r\n 'b': \u003cpf.func_op 'b' target=\u003cfunction identity at 0x106500310\u003e args=\u003c1 items\u003e kwargs=\u003c0 items\u003e\u003e,\r\n 'x': \u003cpf.func_op 'x' target=\u003cbuilt-in function add\u003e args=\u003c2 items\u003e kwargs=\u003c0 items\u003e\u003e}\r\n```\r\n\r\nHowever, if I evaluate any of the `Operation` instances in the notebook cell (e.g. `a` or `b` at the end of the cell) the dictionary with `graph.operations` grows with additional items (and continues growing by a dozen new `getattr` operations every time I evaluate any of the operations)\r\n\r\nHere a screenshot that is self-explaining:\r\n\r\n![image](https://github.com/spotify/pythonflow/assets/15058994/9ddd2bf4-d19b-4c2e-911b-1bf3122dde06)\r\n\r\nIs there a way to prevent this behavior?","author":{"url":"https://github.com/MatusGasparik","@type":"Person","name":"MatusGasparik"},"datePublished":"2023-05-09T13:06:24.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/55/pythonflow/issues/55"}