On Sat, May 2, 2009 at 9:01 PM, Georg Brandl
Hi,
this is just a short notice that Mattias Brändström and I have finished a patch to implement the previously discussed and mostly warmly welcomed extension to with's syntax, allowing
with A() as a, B() as b:
to be written instead of
with A() as a: with B() as b:
This syntax was chosen (over "with A(), B() as a, b:") because it has more syntactical similarity to the written-out version. Also, our current uses of "as" all have only one expression on the right.
The patch implements it as a simple AST transformation, which guarantees semantic equivalence. It is at http://codereview.appspot.com/53094.
If there is no strong opposition, I will commit it and port it to py3k before 3.1 enters beta stage.
cheers, Georg
I was hoping for the other syntax in order to be able to create a nested context in advance as a simple tuple: with A, B: pass context = A, B with context: pass (I.e. a tuple, or perhaps any iterable, would be a valid context manager.) With the syntax in the patch, I will still have to implement a custom nesting context manager to do this, which sort of defeats the purpose. Fredrik