Fixes#1940.
This makes it so that mypy will infer the common base class of these
classes to be Awaitable instead of Iterable. I verified that this
fixes the errors in the script posted by @neilconway.
The annotations, formatarg, formatvarargs, formatvarkw, formatvalue,
formatreturns, and formatannotations arguments to inspect.formatargspec
have default values, but they cannot be None.
This module is going to be used by mypy for the daemon on Windows. To that end I ran stubgen on _winapi, then read through Modules/_winapi.c to add the function types. This seems to have been added in Python 3.1, but I think it is completely fine to just leave it in stdlib/3.
* add inspect.{isasyncgenfunction,isasyncgen} (3.6)
* reorder inspect.CO_* as in Python 3.6 doc
* add inspect.CO_{COROUTINE,ITERABLE_COROUTINE} (3.5)
* add inspect.CO_ASYNC_GENERATOR (3.6)
* use variable annotations
* use version checks
* Parameter.empty is a class attribute
* Signature.empty is a class attribute
The dict stub was referring to an instance, not the type, leading to
__call__ being considered when using as a decorator, rather than
__init__.
mock is a backport of the stdlib module and should be defined the same.
* Add OpenDirector.addheaders and replace type comments with annotations
* Use ClassVar/eliminate `= ...` and add BaseHandler.handler_order (exists in Py2 versions)
Basically, the same thing as [my previous pull request][0], except the
fixes are now focusing on functions with overlapping argument counts.
[0]: https://github.com/python/typeshed/pull/2138
This commit reorders any overloads where the first overload was
"shadowing" the second, preventing it from ever being matched by type
checkers that work by selecting the first matching overload alternative.
For example, the first overload alternative below is strictly broader
then the second, preventing it from ever being selected:
class Parent: pass
class Child(Parent): pass
@overload
def foo(x: *int) -> Parent: ...
@overload
def foo(x: int, y: int) -> Child: ...
The correct thing to do is to either delete the second overload or
rearrange them to look like this:
@overload
def foo(x: int, y: int) -> Child: ...
@overload
def foo(x: *int) -> Parent: ...
Rationale: I'm currently [working on a proposal][0] that would amend
PEP 484 to (a) mandate type checkers check overloads in order and
(b) prohibit overloads where an earlier alternative completely shadows
a later one.
[0]: https://github.com/python/typing/issues/253#issuecomment-389262904
This would prohibit overloads that look like the example below, where
the first alternative completely shadows the second.
I figured it would be a good idea to make these changes ahead of time:
if my proposal is accepted, it'd make the transition smoother. If not,
this is hopefully a relatively harmless change.
Note: I think some of these overloads could be simplified (e.g.
`reversed(...)`), but I mostly stuck with rearranging them in case I was
wrong. The only overload I actually changed was `hmac.compare_digest` --
I believe the Python 2 version actually accepts unicode.
Fixes#1997, #2068.
This is tricky because we need to get the return values right (see #1960 for
prior attempts) and we often run into python/mypy#3644. I found that I
could express most signatures correctly using a series of overloads.
A few other changes in here:
- Added splitunc, which according to https://docs.python.org/3/library/os.path.html
should exist in both Unix and Windows.
- Made the second argument to os.path.curdir Optional to match the implementation.
- Fixed os.path.split, whose previous Path-aware signature triggered python/mypy#3644.
In Python 3, the ndigits argument of round() defaults to None. If
ndigits is excluded or explicitly None, the result is always an int. If
ndigits is not None, the result should be the same type as the number.
$ cat test.py
from fractions import Fraction
print(type(round(0.1)))
print(type(round(0.1, None)))
print(type(round(0.1, 0)))
print(type(round(Fraction(1, 10))))
print(type(round(Fraction(1, 10), None)))
print(type(round(Fraction(1, 10), 0)))
$ python3 ./test.py
<class 'int'>
<class 'int'>
<class 'float'>
<class 'int'>
<class 'int'>
<class 'fractions.Fraction'>
Update the signatures to allow for an ndigits of None.
Jelle Zijlstra