René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`f'\"{var:}\"'` adds redundant empty string literal in AST in 3.12","articleBody":"3.11:\r\n\r\n```python\r\n\u003e\u003e\u003e import ast\r\n\u003e\u003e\u003e print(ast.dump(ast.parse(\"\"\"f'\"{var:}\"'\"\"\"), indent=2))\r\nModule(\r\n  body=[\r\n    Expr(\r\n      value=JoinedStr(\r\n        values=[\r\n          Constant(value='\"'),\r\n          FormattedValue(\r\n            value=Name(id='var', ctx=Load()),\r\n            conversion=-1,\r\n            format_spec=JoinedStr(values=[])),\r\n          Constant(value='\"')]))],\r\n  type_ignores=[])\r\n```\r\n\r\n3.12:\r\n\r\n```python\r\n\u003e\u003e\u003e import ast\r\n\u003e\u003e\u003e print(ast.dump(ast.parse(\"\"\"f'\"{var:}\"'\"\"\"), indent=2))\r\nModule(\r\n  body=[\r\n    Expr(\r\n      value=JoinedStr(\r\n        values=[\r\n          Constant(value='\"'),\r\n          FormattedValue(\r\n            value=Name(id='var', ctx=Load()),\r\n            conversion=-1,\r\n            format_spec=JoinedStr(\r\n              values=[\r\n                Constant(value='')])),\r\n          Constant(value='\"')]))],\r\n  type_ignores=[])\r\n```\r\n\r\nThis affects several linters:\r\n1. https://github.com/python/mypy/pull/15577\r\n2. https://github.com/PyCQA/flake8-bugbear/issues/393\r\n\r\nIs this a bug? Or is it a feature?\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-106401\n* gh-106416\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/sobolevn","@type":"Person","name":"sobolevn"},"datePublished":"2023-07-04T03:48:01.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/106396/cpython/issues/106396"}