On 30 August 2017 at 16:40, Nick Coghlan
Writing an "update_parent_context" decorator is also trivial (and will work for both sync and async generators):
def update_parent_context(gf): @functools.wraps(gf): def wrapper(*args, **kwds): gen = gf(*args, **kwds): gen.__logical_context__ = None return gen return wrapper [snip] While I'm not sure how much practical use it will see, I do think it's important to preserve the *ability* to transparently refactor generators using yield from - I'm just OK with such a refactoring becoming "yield from update_parent_context(subgen())" instead of the current "yield from subgen()" (as I think *not* updating the parent context is a better default than updating it).
Oops, I got mixed up between whether I thought this should be a decorator or an explicitly called helper function. One option would be to provide both: def update_parent_context(gen): ""Configures a generator-iterator to update its caller's context variables"""" gen.__logical_context__ = None return gen def updates_parent_context(gf): ""Wraps a generator function's instances with update_parent_context"""" @functools.wraps(gf): def wrapper(*args, **kwds): return update_parent_context(gf(*args, **kwds)) return wrapper Cheers, Nick. -- Nick Coghlan | ncoghlan@gmail.com | Brisbane, Australia