[Python-ideas] A different kind of context manager

[Nick Coghlan]

No, it wouldn't. Read PEP 340 (the one Guido wrote *before* descoping it in
PEP  343).

The problem with offering true blocks is that they immediately create
multiple ways to do a lot of different things, and this callback based
variant also plays merry hell with the scoping rules.

That said, something I *have* been thinking might work better than the
status quo is permitting a variant of tuple unpacking that enters each
context manager as it is produced and provides a tuple of the results. So
this would work properly:

    with *(open(name) for name in names) as files:
       ...

And you could factor out with statement skipping as a function returning a
2-tuple (although unpacking the value would be a little annoying in that
case).

Cheers,
Nick.
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