[Python-ideas] Automatic context managers

[Bruce Leban]

On Fri, Apr 26, 2013 at 1:12 PM, David Mertz <mertz at gnosis.cx> wrote:

> You might get really perverse with stack inspection and whatnot.  But I
> was thinking more of just a proxy method that introduced the safety.
>
> class SafeOpen(object):
>     def __init__(self, resource):
>         self.resource = resource
>     def __getattr__(self, name):
>         def f(*args, **kws):
>             with open(self.resource) as x:
>                 y = getattr(x, name)(*args, **kws)
>             return y
>         return f
>

Wouldn't that close the resource before the use function is actually
called? As I read it, it opens, calls getattr(x, 'use'), closes x, then
calls x.use().

--- Bruce
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