Self-compilation needs some stub packages. I'm adding them to a separate
since they are not nee...

Currently cache_dir does not expand user home directory, which results
in counter-intuitive beh...

Resolves #4675, resolves #9981.

Additionally, we always ignore site-packages and node_modules...

Add support for loading tuple literals using `LoadLiteral`. The literal tuple objects will
be c...

Redesign the implementation of constant `PyObject *` values, such as string and integer
litera...

Fixes #10035.

Even if we assume that typeshed stubs don't change, we need the deps
when bringing in new stubs...

A special case for dealing with blocking errors caused false positives
when following imports. ...

File watcher state for files added to the build wasn't updated
correctly, resulting in crashes....

Fixes #10011

I think this is just vestigial from some initial debugging

Co-authored-by: ha...

Previously giving an invalid value to `--custom-typeshed-dir` could
cause mypy to crash.

Thi...

Now you can sync the current typeshed master by just running
`misc/sync-typeshed.py` without an...

In some cases the VERSIONS file can't be found, and it's kind of hard to debug.

These haven't been working for a long time. Typeshed includes
a mypy test already, so it's fine...

These are no longer relevant after we removed the typeshed
submodule in #9973.

This is a follow up for #9973

Co-authored-by: Ivan Levkivskyi <[email protected]>

Support the new structure of typeshed (python/typeshed#2491) and only
bundle stdlib stubs with ...

I'll add mypy/typeshed back in another commit as a copy of a
typeshed subset.

This is preparati...

The parameter not permitted with
--namespace-packages is --explicit-package-bases,
there is no...

For whatever reason, these options get misused a lot and cause a lot of
problems. #9954 is only...

This speeds up the list_remove microbenchmark by about 30% and the
list_index microbenchmark by...

This makes us more compatible with CPython, which interns (some)
string literals.

This speed...

Since we only use relatively few features supported by the original argument
parsing code, much...

Add specialized argument parsing functions for these simple signatures:
1. No arguments
2. Sin...

It looks like pip just dropped Python 3.5 support, but we are not quite
yet ready to do it (as ...

Allocate a vectorcall function pointer as a struct field for native
classes that include `__cal...

Implement faster argument parsing based on METH_FASTCALL on supported
Python versions.

Use ...

An assertion expected the second result of method `ExpressionChecker.check_call` to
be a `Call...

Previously this would throw an error, however according to PEP 589
.get() should be allowed for...

Use the new generic built-in type syntax (list[t] etc.) in the cheat sheet,
getting started and...

* [stubdoc] fix typo

* [stubgenc] Add Callable to _DEFAULT_TYPING_IMPORTS

* [stubgenc] Fix...

I removed the documentation for this error already in #9675.

This list of modules here that w...

This should cover the current state on master, as previously
discussed / implemented across #97...

PEP 647 is still in draft mode, but it is likely to be accepted, and this helps solve some real ...

__class_getitem__ and __init_subclass__ are always classmethods, even if
they aren't decorated....

Adding these since they are trivial to implement.

This stopped working because of typeshed changes in
b884a394b4406b647317668a28538821ca08c056. T...

The test case wasn't actually testing the primitive, since all the
calls were in the driver, wh...

Fixes mypyc/mypyc#792.

Always give __init__ an implicit None return type so that programs lik...

Fixes #9888.

I applied the following patch to typeshed and ran self check:
```
+@overload
...

Use `PyLong_FromLong` instead of `PyLong_FromSsize_t` since it's faster
(at least on Python 3.8...

Since my checklist in https://github.com/python/mypy/issues/9761 is
almost complete, it's time ...

Co-authored-by: hauntsaninja <>

Co-authored-by: hauntsaninja <>

* new upload pypi script

CI now builds the pure Python wheel and sdist.
Use the Github API t...

Fixes #8629, fixes #8523.

This creates a new page to document issues arising from discrepanci...

See first test case for the scenario where this causes issues (the second test case is already h...

Currently only files can be specified on the command line if files are
specified in mypy.ini. ...

mypy_primer was temporarily removed in #9769. This brings it back.
See https://github.com/pytho...

Co-authored-by: Ivan Levkivskyi <[email protected]>

This prevents users from hitting asserts before PEP 612 support is fully
implemented.

Co-aut...

Co-authored-by: Ivan Levkivskyi <[email protected]>

Tidy things up a bit, and improve documentation in code.

These mostly, but not exclusively, t...

The new class is a direct subclass of `Value` instead of an `Op` subclass.
It essentially chan...

This speeds up the `if_true` microbenchmark by about 5%. Code size is also
reduced.

Co-authored-by: Ivan Levkivskyi <[email protected]>

It was a bit odd that the module started with a long comment about
serialization, which isn't e...

Since `IntOp` is also used as a namespace for op constants, it's common to
refer to the class n...

This continues work on mypyc/mypyc#781.

Since they are only used during the IR build, define them in
`mypyc.irbuild`. Also simplify the...

This was introduced in #9800.

Add new helpers for generating methods that reduces the required
boilerplate. Switch several ex...

Speed up multiple assignment from variable-length lists and tuples.
This speeds up the `multip...

Without this option, pytest can print out many lines of garbage
if there are more than 8 parall...

Remove `mypyc.ir.ops.Environment`. Represent potentially uninitialized variables
explicitly in...

See https://github.com/python/cpython/blob/master/Include/cpython/object.h#L456

Fixes #789.
...

Instead of maintaining symbol tables in `Environment`, they are maintained in
`IRBuilder` and d...

Co-authored-by: Ivan Levkivskyi <[email protected]>

Co-authored-by: Ivan Levkivskyi <[email protected]>

Fixes #9340

As mentioned in the feature request, mypy now gives more information about the mi...

Several tests rely on getting the default width of a terminal for
rendering test output. Some P...

This gives a new error code for code like this:

```
# Foo and Bar don't match
Foo = NamedTu...

The release of pytest 6.2 broke mypy's type checking of itself, since pytest 6.2 drops support f...

This is the successor to https://github.com/python/mypy/pull/9632. Things should basically be as...

Co-authored-by: hauntsaninja <>

This fixes an issue where this code resulted in an unbound local `p`
error:

```
def f() -> ...

Implements dict clear primitive for improved performance.

Related ticket: mypyc/mypyc#644

Co-authored-by: hauntsaninja <>

Instead of generating names for ops when building IR, we now generate names
immediately before...

A sample bytes arg of b'b' makes the example hard to parse

Fixes #5744

Updates the attrs plugin. Instead of directly copying attribute type along the MR...

Fixes #7520

Updates the dataclasses plugin. Instead of directly copying attribute type along ...

Co-authored-by: hauntsaninja <>

Implements list insert primitive for improved performance.

Related ticket: mypyc/mypyc#644

Co-authored-by: hauntsaninja <>

Resolves #7907

Co-authored-by: cdce8p <[email protected]>
Co-authored...

Previously the message accidentally converted all identifiers to
lowercase. By rephrasing the m...