Fixes #15639.

The new-style API `attrs.define` [enables slots by
default](https://www.attrs....

Fixes a
[gotcha](https://github.com/python/mypy/pull/15283#issuecomment-1631820071)
with `--up...

Follow up to #15430 — would've made
https://github.com/python/mypy/pull/15566#issuecomment-1616...

The 7.4.0 release of pytest broke mypy because we were using some
undocumented, private API tha...

These are treated the same way as `TypeVar` except imported from
`typing_extensions` instead of...

Fixes: #15020

Followup to https://github.com/python/mypy/pull/15586

This will be the last one 🚀

Followup to https://github.com/python/mypy/pull/15586

Fix the testProtocol test case in mypyc/test-data/run-classes.test.

There was a comment indic...

This is mostly similar to `i16` that I added recently in #15464, but
there are some
difference...

Followup to https://github.com/python/mypy/pull/15586

Co-authored-by: Shantanu <12621235+haun...

Got commits from https://github.com/python/mypy/commits/master after
merging https://github.com...

This is allegedly causing large performance problems, see 13821

typeshed/8231 had zero hits on ...

Since the plugin provides superior type checking: https://github.com/python/mypy/pull/13987#issue...

Source commit:
https://github.com/python/typeshed/commit/fc7d4722eaa54803926cee5730e1f784979c0531

If misc/sync-typeshed.py fails to apply a cherry pick, it just fails.
Let's try to give the use...

This PR fixes a word within a code block of the `Getting Started/Types
from libraries` document...

There were few cases when someone forgot to call `strict_optional_set()`
in dataclasses plugin,...

This fixes the testPickling test case in
mypyc/test-data/run-classes.test on Python 3.12.

Ha...

Warnings before:
https://github.com/python/mypy/issues/15330#issuecomment-1615010604
Warnings ...

These mostly date back to https://github.com/python/mypy/pull/4369 There
are also some skipped ...

Fix stdout flushing to avoid empty lines getting out of alignment with
the rest of the output.
...

I forgot to add this when I added mypyc support for the i16 native
integer type.

The mypy_ex...

Towards mypyc/mypyc#978.

---------

Co-authored-by: Jukka Lehtosalo <[email protected]...

The changes made in #15543 mean that mypy's tests will no longer pass if
you've got `typing_ext...

Fixes #15529

The fix is straightforward, hopefully there will be no fallout. (Note
that #140...

There's no real need for us to have separate `setup.cfg` and
`pytest.ini` files these days

Fixes #7186

We can probably add some kind of redirect from mypy-lang.org, but I
think RTD li...

I am adding these mostly to get rid of the allowlist in
`html_builder.py`, please feel free to ...

Fix sdist and python wheel build.
https://github.com/mgedmin/check-manifest

https://github.c...

Fixes #9408
Fixes #4122
Fixes #6462
Supersedes #13353

This PR enables two similar technica...

Now we use a similar approach to
https://github.com/python/mypy/pull/14849
First, we generate ...

Now mypy can constant fold these additional operations:

- Float arithmetic
- Mixed int and f...

Two recent mypyc PRs didn't work together (#15470 and #15464). Fix them.

The representation of `int` objects was changed in Python 3.12.

Define some helper macros to ...

It is not needed, because it is always serialized as `bool` and is
always present.

It was ad...

I think we relied on undocumented behavior on older Python versions. Now
it works consistently ...

Got this working with a little trial and error.

Work on mypyc/mypyc#995.

The `i16` type behaves the same as `i64` and `i32`, but is obviously
smaller. The PR is big, bu...

Now it uses the same pattern for `.fail` as similar places:
-
https://github.com/python/mypy/b...

Fixes #15489

pytest 7.4.0 was just released, and our CI on `master` is very red as a
result. Looks like we'r...

We don't use either of these in our own code at all. Neither of them
should be needed in 2023.
...

All recent versions (declared in `setup.py`) have `TypedDict` there. So,
no need to use `mypy-e...

In #15164 we've made it so that `# type: ignore`s in lines skipped in
semantic analysis would n...

Co-authored-by: Alex Waygood <[email protected]>

Since tests are parallelized, the temporary test name must be unique.

It's currently unused but I have other PRs that will need this.

We can later make this more g...

The tests added with this piece of code now pass even without it. It
looks like the crash was p...

Fixes #1317
Fixes #5738
Fixes #12919
(also fixes a `FIX` comment that is more than 10 years ...

Validate `dataclassses.replace` actual arguments to match the fields:

- Unlike `__init__`, th...

Fixes #14056

#14056 was originally reported as a mypyc issue (because that's how it
presente...

Fixes #15446

setuptools has broken how editable installs work. It seems like most
other buil...

This simplifies things a bit. All the C compilers we care about should
support this.

This wi...

Fixes #5343
Fixes #12249

This can potentially slow down runs in situations where multiple
u...