* travis: run stubtest on py39, allowing failures
* travis: run mypy with python version 3.9
* boto.compat, base64: fix version handling of (en|de)codebytes
* venv: fix#4010
Co-authored-by: hauntsaninja <>
* asyncio: remove BaseChildWatcher from top level
* asyncio.sleep: loop is keyword-only
* asyncio: remove Server from top level
* asyncio: add FastChildWatcher to top level
* asyncio.constants: fix version availability
* asyncio: fix arg name for _wakeup
* asyncio: fix arg name for wrap_future
* asyncio.streams: add Optional to various arguments
It might be possible to further improve some of these with overloads.
* stubtest: fix whitelist
Co-authored-by: hauntsaninja <>
* flake8 updates and cleanups
* Update to flake8 3.7.9.
* Update to flake8-bugbear 20.1.4.
* Only ignore errors in stub files.
* Remove obsolete error counts.
* Sort error codes alphabetically.
* Don't ignore the following errors (unneeded):
* E704 Multiple statements on one line (def)
* W504 Line break occurred after a binary operator
* B303 __metaclass__ used
* Remove obsolete comment
* Ignore F822 undefined name in __all__
* typing: fix argument names of cast
* typing: use private _Alias class
For py37 and above, this is _GenericAlias, for py36 and below it's
_TypeAlias. I don't think we need to make typing.pyi definitions
correspond more precisely, but we should avoid leaking a
typing.TypeAlias class
- connect_accepted_socket isn't a member of AbstractEventLoop, only
BaseEventLoop
- fix types of arguments with defaults. some of these functions could
have their signatures improved with overloads to reduce false negatives
- correctly mark a positional-only argument
- remove abstractmethod from methods that don't have abstractmethod and
go unimplemented in practice
It doesn't actually have __call__, it does some descriptor stuff, but
this makes things work. _SingleDispatchCallable has a __call__ too,
which is what this mirrors.
Fixes#3898
NodeVisitor recurses over an AST tree. When encountering a node, it
checks if a method called `visit_{node.__class__.__name__}` exists, and
calls it if so, otherwise calls the generic visitor.
Add the possible methods to NodeVisitor. This is not exactly correct,
since the methods don't *actually* exist on NodeVisitor, e.g.
`NodeVisitor().visit_Module(...)` doesn't work. But it's nice for
subclasses to know which methods they can override and which type they
should have.
