Rudy,

I think your proposal may be very specific to iterable context managers;

in which case, make a method that makes that assumption:

> def iter_with(obj):
>     with obj as context:
>         yield from context

and use it

> g = (
>     f.read()
>     for fn in filenames
>     for f in iter_with(open(fn))
> )

On 2018-07-30 15:15, Rudy Matela wrote:
> Hello,
>
> Do you think it would be nice to allow with statements inside genexps or
> list comprehensions?  The functions __enter__ and __exit__ would be
> automatically called as iterables are traversed.  I am thinking of
> drafting a PEP about this.  Examples:
>
>
> This
>
>         g = (f.read() for fn in filenames with open(fn) as f)
>
> would be equivalent to the following use of a generator function:
>
>         def __gen():
>                 for fn in filenames:
>                         with open(fn) as f:
>                                 yield f.read()
>         g = __gen()
>
>
> This
>
>         list = [f.read() for fn in filenames with open(fn) as f]
>
> would be equivalent to the following:
>
>         list = []
>         for fn in filenames:
>                 with open(fn) as f:
>                         list.append(f.read())
>
> --
> Rudy
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