René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Allow initial comma","articleBody":"Allow initial comma.\r\n\r\nFinal comma works:\r\n\r\n```python\r\n\r\nt = (\r\n     1,\r\n     2,\r\n    )\r\nx = [\r\n     1,\r\n     2,\r\n    ]\r\ny = {\r\n     1,\r\n     2,\r\n    }\r\nz = {\r\n     1:11,\r\n     2:22,\r\n    }\r\ndef fun(\r\n      a,\r\n      b,\r\n     ):\r\n      pass\r\n\r\n```\r\n\r\nInitial comma does not work:\r\n\r\n```python\r\n\r\nt = (\r\n     , 1\r\n     , 2\r\n    )\r\nx = [\r\n     , 1\r\n     , 2\r\n    ]\r\ny = {\r\n     , 1\r\n     , 2\r\n     }\r\nz = {\r\n     , 1:11\r\n     , 2:22\r\n     }\r\ndef fun(\r\n     , a\r\n     , b\r\n     ):\r\n      pass\r\n```\r\n\r\nTo make the syntax symmetric in this regard\r\ngives more freedom to format the code.\r\n\r\nI occasionally found the restriction an unnecessary nuisance.\r\n\r\nBefore writing a PEP,\r\nI would like to discuss,\r\n\r\n- whether something like that has been proposed already?\r\n- what counter-arguments there could be?\r\n\r\n","author":{"url":"https://github.com/rpuntaie","@type":"Person","name":"rpuntaie"},"datePublished":"2021-03-11T09:19:35.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/1867/peps/issues/1867"}