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 > _______________________________________________ > Python-ideas mailing list > Python-ideas@python.org > https://mail.python.org/mailman/listinfo/python-ideas > Code of Conduct: http://python.org/psf/codeofconduct/ _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
