Context manager able to write to the caller's namespace

[Chris Angelico]

On Fri, Jan 19, 2018 at 5:00 PM,  <salvatore.fitzpatrick at bankmail.host> wrote:
> Hello,
>
> Thank you for your mail. I will answer as fast as possible.

If you're going to subscribe to a mailing list, PLEASE disable your
autoresponder.

Otherwise, messages like this will get marked as Spam, and your legit
mail will end up getting tarred with the same metaphorical brush.

ChrisA