[Python-ideas] Re: Using 'with' with extra brackets for nicer indentation

On 19/11/19 4:54 am, Paul Moore wrote:

"should only manage one resource" is not actually correct - the whole *point* of something like nested() would be to manage multiple resources

I think a better way to say it would be that the __enter__ method should be atomic -- it should either acquire all the resources it needs or none of them. Then it's clear that the with statement should call __exit__ if and only if __enter__ does not raise an exception. -- Greg