Marce Coll wrote at 2022-12-20 22:09 +0100: >Hi python people, hope this is the correct place to ask this! > >For a transactional async decorator I'm building I am using contextvars in >order to know when a transaction is open in my current context. > >My understanding is that if given the following call stack > >A >|- B >| |- C >|- D > |- E > >If you set a context var at A with value 1, and then override it at B with >value 2, then A, D and E will see value 1 and B and C will se value 2. Very >similar (although a bit more manual) than dynamic scopes in common lisp.
This is not the way I understand context variables. In my view (--> PEP 0567), the context is the coroutine not the call stack. This means: all calls in the same coroutine share the same context variables. In your example, if `B` overrides the context variable, then all later calls in this coroutine will see the overridden value. -- https://mail.python.org/mailman/listinfo/python-list
