René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: FigureCanvasTkAgg call creates memory leak","articleBody":"### Bug summary\n\npython 3.10.4\r\n\r\nWhile using matplotlib 3.5.1 I have encountered a problem in calling multiple times the function FigureCanvasTkAgg().\n\n### Code for reproduction\n\n```python\nfrom tkinter import *\r\nfrom matplotlib.figure import Figure\r\nfrom matplotlib.backends.backend_tkagg import FigureCanvasTkAgg\r\nimport tracemalloc\r\nimport gc\r\n\r\n\r\ndef repeat(n, fig, root):\r\n    for i in range(n):\r\n        agg = FigureCanvasTkAgg(fig, root).get_tk_widget()\r\n        agg.destroy()\r\n        del agg\r\n        gc.collect()\r\n\r\n\r\ndef main():\r\n    root = Tk()\r\n    root.geometry(\"300x300+0+0\")\r\n    fig = Figure(dpi=200)\r\n\r\n    tracemalloc.start()\r\n    tracemalloc.clear_traces()\r\n\r\n    print(tracemalloc.get_traced_memory())\r\n    repeat(10, fig, root)\r\n    print(tracemalloc.get_traced_memory())\r\n\r\n    tracemalloc.clear_traces()\r\n    print(tracemalloc.get_traced_memory())\r\n\r\n    repeat(20, fig, root)\r\n    print(tracemalloc.get_traced_memory())\r\n\r\n    tracemalloc.clear_traces()\r\n    print(tracemalloc.get_traced_memory())\r\n\r\n    repeat(30, fig, root)\r\n    print(tracemalloc.get_traced_memory())\r\n\r\n    tracemalloc.clear_traces()\r\n    print(tracemalloc.get_traced_memory())\r\n\r\n    root.mainloop()\r\n\r\n\r\nif __name__ == \"__main__\":\r\n    main()\n```\n\n\n### Actual outcome\n\n(0, 0)\r\n(42116, 55520)\r\n(0, 0)\r\n(41983, 55387)\r\n(0, 0)\r\n(65031, 78436)\r\n(0, 0)\n\n### Expected outcome\n\n(0, 0)\r\n(0, 0)\r\n(0, 0)\r\n(0, 0)\r\n(0, 0)\r\n(0, 0)\r\n(0, 0)\n\n### Additional information\n\n_No response_\n\n### Operating system\n\nWindows 10\n\n### Matplotlib Version\n\n3.5.1\n\n### Matplotlib Backend\n\nmodule://backend_interagg\n\n### Python version\n\n3.10.4\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\n_No response_","author":{"url":"https://github.com/AlbertoEusebio","@type":"Person","name":"AlbertoEusebio"},"datePublished":"2022-04-17T17:24:01.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/22858/matplotlib/issues/22858"}