[Python-ideas] __enter__ and __exit__ on generators

[Michael Selik]

On Tue, Jul 5, 2016 at 10:31 PM Nick Coghlan <ncoghlan at gmail.com> wrote:

> It does occur to me that it might be worth customising the error
> reported, though - it's currently genuinely non-obvious why they don't
> implement the protocol, but it might be clearer if the error was
> "TypeError: generator requires 'contextlib.contextmanager' or
> 'contextlib.closing' to support context management"
>

+1 for error messages that explain how to solve the problem
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