TypedDict with patterns as key names

[abersheeran]

I'm not sure if I should open an issue here at typing, please let me know if there is something better.

WSGI type defines. https://gist.github.com/abersheeran/f3723029387fe7f6584c6b157b90a50a

When writing a more static WSGI definition based on PEP3333, I discovered such a problem. TypedDict cannot describe the HTTP_* keys in the WSGI specification. I know that one of the original intentions of TypedDict is to prevent typing the wrong keys. But can we add an option (for example: allow_undefined=True) to allow this actual problem?

[gvanrossum]

Can you bring this idea up on typing-sig?

[abersheeran]

Sorry, I don't quite understand what you mean, can you elaborate more?

[JelleZijlstra]

@abersheeran Guido is referring to the typing-sig mailing list, which you can sign up for at https://mail.python.org/mailman3/lists/typing-sig.python.org/.

[abersheeran]

@abersheeran Guido is referring to the typing-sig mailing list, which you can sign up for at https://mail.python.org/mailman3/lists/typing-sig.python.org/.

Thanks for your explanation.

[abersheeran]

Related discussion：https://mail.python.org/archives/list/[email protected]/thread/LMZAPV5THQV6MXXO43RMGRRPFJ7TGYQN/

[abersheeran]

I found two old issue about this. https://github.com/python/mypy/issues/7654 https://github.com/python/mypy/issues/4617

[Rocamonde]

What is the progress / status of this? I would find it extremely useful.

[JelleZijlstra]

There is no active work I'm aware of in this area. If you want to move it forward, you'll have to build support among the typing community and eventually write a PEP.