List of lists of lists - Wikipedia

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[[[[]], [[]]], [[[]], [[]]]]
- Python 3.12.7 (main, Oct 1 2024, 00:00:00) [GCC 14.2.1 20240912 (Red Hat 14.2.1-3)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> l = [] >>> l[:] = [l] * 10 >>> l [[...], [...], [...], [...], [...], [...], [...], [...], [...], [...]]

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