Hi Nathan, On Wed, 8 Sep 2010 13:00:25 -0400 Nathan Schneider <nathan@cmu.edu> wrote:
Mark,
I have approached these cases by using the backslash line-continuation operator:
with FakeContext("a") as a, \ FakeContext("b") as b: pass
Yes, of course, and that's the way I've done it. But it seems a pity to do it this way when the documentation explicitly discourages the use of the backslash for line continuation: http://docs.python.org/py3k/howto/doanddont.html (look at the very last item)
Nathan
On Wed, Sep 8, 2010 at 12:50 PM, Mark Summerfield <mark@qtrac.eu> wrote:
Hi,
I can't see a _nice_ way of splitting a with statement over mulitple lines:
class FakeContext: def __init__(self, name): self.name = name def __enter__(self): print("enter", self.name) def __exit__(self, *args): print("exit", self.name)
with FakeContext("a") as a, FakeContext("b") as b: pass # works fine
with FakeContext("a") as a, FakeContext("b") as b: pass # synax error
with (FakeContext("a") as a, FakeContext("b") as b): pass # synax error
The use case where this mattered to me was this:
with open(args.actual, encoding="utf-8") as afh, open(args.expected, encoding="utf-8") as efh: actual = [line.rstrip("\n\r") for line in afh.readlines()] expected = [line.rstrip("\n\r") for line in efh.readlines()]
Naturally, I could split the line in an ugly place:
with open(args.actual, encoding="utf-8") as afh, open(args.expected, encoding="utf-8") as efh:
but it seems a shame to do so. Or am I missing something?
I'm using Python 3.1.2.
-- Mark Summerfield, Qtrac Ltd, www.qtrac.eu C++, Python, Qt, PyQt - training and consultancy "Rapid GUI Programming with Python and Qt" - ISBN 0132354187 http://www.qtrac.eu/pyqtbook.html _______________________________________________ Python-ideas mailing list Python-ideas@python.org http://mail.python.org/mailman/listinfo/python-ideas
-- Mark Summerfield, Qtrac Ltd, www.qtrac.eu C++, Python, Qt, PyQt - training and consultancy "Programming in Python 3" - ISBN 0321680561 http://www.qtrac.eu/py3book.html