René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Add `show_positions` keyword argument to `dis.dis` and related functions","articleBody":"# Feature or enhancement\r\n\r\n### Proposal:\r\n\r\n`dis.dis` is a useful debugging tool when trying to debug minor bytecode compiler errors. \r\nHowever it lacks one important feature, the ability to see the exact positions attached to instructions. It can only show line numbers.\r\n\r\nWe should add a `show_positions` keyword argument to show positions.\r\nFor example, the function:\r\n```Py\r\ndef foo(x):\r\n    if x == 2:\r\n        return 1\r\n```\r\ndisassembles to:\r\n```\r\n\r\n  2           RESUME                   0\r\n\r\n  3           LOAD_FAST                0 (x)\r\n              LOAD_CONST               1 (2)\r\n              COMPARE_OP              88 (bool(==))\r\n              POP_JUMP_IF_FALSE        1 (to L1)\r\n\r\n  4           RETURN_CONST             2 (1)\r\n\r\n  3   L1:     RETURN_CONST             0 (None)\r\n```\r\nwith `show_positions` it would disassemble to something like:\r\n```\r\n2:0-2:0                RESUME                   0\r\n\r\n3:7-3:8                LOAD_FAST                0 (x)\r\n3:12-3:13              LOAD_CONST               1 (2)\r\n3:7-3:13               COMPARE_OP              88 (bool(==))\r\n3:7-3:13               POP_JUMP_IF_FALSE        1 (to L1)\r\n\r\n4:15-4:16              RETURN_CONST             2 (1)\r\n\r\n3:7-3:13       L1:     RETURN_CONST             0 (None)\r\n```\r\n\r\n### Has this already been discussed elsewhere?\r\n\r\nThis is a minor feature, which does not need previous discussion elsewhere\r\n\r\n### Links to previous discussion of this feature:\r\n\r\n_No response_\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-123168\n* gh-123220\n* gh-123808\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/markshannon","@type":"Person","name":"markshannon"},"datePublished":"2024-08-20T08:46:02.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/123165/cpython/issues/123165"}