Multiline with clause in Python

Question

How can I spread a long with clause in Python over multiple lines? Right now, I have

    with self.context_manager_one(some, parameters, that, are, passed) \
            as return_value_one, \
            self.context_manager_two(self.p, slice(None), None) \
            as return_value_two:

I would like to follow Google's Python style guide, which proscribes backslash line continuation.

I mean just `with ... as return_value_two` inside `with ... as return_value_one`. — alecxe, May 04 '13 at 18:37
Right, that saves one `\\`, but is there no way to use parentheses to do this? Looking at the parse tree, it doesn't seem possible. — Neil G, May 04 '13 at 18:38
I'd just define context managers outside the with statement or use `nested`: http://docs.python.org/2/library/contextlib.html. Hope that helps. — alecxe, May 04 '13 at 18:40
@alecxe: Okay, thanks. Too bad Python doesn't allow parentheses with the `with` statement. It seems an arbitrary limitation. — Neil G, May 04 '13 at 18:46
You can add `()` around an expression: `with (open("c:\\temp\\23", "w")) as f: pass` worked for me, and so should `with (self.context_manager_one(some, parameters, that, are, passed)) as return_value_one, (self.context_manager_two(self.p, slice(None), None)) as return_value_two:`. There you can add line breaks as you want. — glglgl, May 27 '13 at 12:13
Related: https://stackoverflow.com/questions/31039022/python-multi-line-with-statement — User, Feb 23 '20 at 11:51
Does this answer your question? [Python multi-line with statement](https://stackoverflow.com/questions/31039022/python-multi-line-with-statement) — User, Feb 23 '20 at 11:54

score 0 · Accepted Answer · answered Jun 11 '20 at 12:12

0

This is fixed in Python 3.10!

https://github.com/we-like-parsers/pegen/issues/229

https://bugs.python.org/issue12782

answered Jun 11 '20 at 12:12

Neil G

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Multiline with clause in Python

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