New submission from Gregory P. Smith <g...@krypto.org>:
A Python pattern in code is to keep everything indented to look pretty while, yet when the triple quoted multiline string in question needs to not have leading whitespace, calling textwrap.dedent("""long multiline constant""") is a common pattern. rather than doing this computation at runtime, this is something that'd make sense to do at compilation time. A natural suggestion for this would be a new letter prefix for multiline string literals that triggers this. Probably not worth "wasting" a letter on this, so I'll understand if we reject the idea, but it'd be nice to have rather than importing textwrap and calling it all over the place just for this purpose. There are many workarounds but an actual syntax would enable writing code that looked like this: ```python class Castle: def __init__(self, name, lyrics=None): if not lyrics: lyrics = df"""\ We're knights of the round table We dance whene'er we're able We do routines and scenes With footwork impeccable. We dine well here in {name} We eat ham and jam and spam a lot. """ self._name = name self._lyrics = lyrics ``` Without generating a larger temporary always in memory string literal in the code object that gets converted at runtime to the desired dedented form via a textwrap.dedent() call. I chose "d" as the the letter to mean dedent. I don't have a strong preference if we ever do make this a feature. ---------- components: Interpreter Core messages: 342373 nosy: gregory.p.smith priority: low severity: normal status: open title: Compile time textwrap.dedent() equivalent for str or bytes literals type: enhancement versions: Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue36906> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com