Suggest a future feature name in `from __future__ import`

[Locked-chess-official]

Feature or enhancement

Proposal:

When from __future__ import with a wrong name, maybe it is a typo. We can suggest a possible name. Just like:

>>> from __future__ import annotation
  File "<python-input-0>", line 1
    from __future__ import annotation
                           ^^^^^^^^^^
SyntaxError: future feature 'annotation' is not defined. Did you mean: 'annotations'?

One possible way is just read the line and analyse.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-145868: Suggest names on typos in __future__ imports #154347

[picnixz]

The error is raised at the interpreter's level. However we need to use _Py_CalculateSuggestions in this case. Currently, the only future that is not a nop is annotations so I wonder whether it will really be useful (and we also want to move away from it and only new versions will see the improved message).