This fixes an error in Travis that seems to have been caused by python/mypy#4319.
The fix was taken from the stdlib/3.4/enum.pyi stub. Mypy no longer assumes
that classes whose metaclass is EnumMeta are subclasses of Enum, so we can't
bound the typevar on Enum.
A call like this:
```
from attr import attrib
from attr.validators import optional, instance_of
c = attrib(default=None, validator=optional(instance_of(bytes)))
```
Was returning no return value, because the first overload was T -> T.
The solution was to change the ordering so that the first overload is
None -> T and infer the type from the other arguments.
Add all cursor types and missing show_warnings method in connections
Added show_warnings to connections. No return type specified as this
requires tracing back through missing return types in previous
author's work. This is out of scope for this pull request.
Added SSDictCursor, SSCursor and DictCursorMixin to complete the
Cursors definition.
* Fix werkzeug environ type
PEP 3333 explicitly calls for environ to be a built-in dict. Using a
Mapping will not only prevent the dict from being modified (which is
explicitly allowed by PEP 3333), it will also cause interaction
problems when the environment is passed to other WSGI handlers.
Also change the value type from object to Any for convenience. By
definition, the values can be anything and can't be type checked.
Using object instead of Any forces us to explicitly cast the value
whenever we access it.
* Use Union[str, unicode] for Werkzeug environment keys
This matches the type in wsgiref.types.
* Use WSGIEnvironment from wsgiref.types
* Add '= ...' to environ attribute
From the docstring for Template: "Template objects created from the
constructor rather than an environment do have an `environment`
attribute that points to a temporary environment ..."
* requests: allow strings in Session.verify
Per the documentation[1] (and actual usage), the verify parameter can be a
string or a bool.
[1] http://docs.python-requests.org/en/master/user/advanced/#ssl-cert-verification
* requests: explicitly support AuthBase for Session.auth
According to the documentation, the auth parameter should be an AuthBase
subclass[1]. In practice, the actual requirement seems to just be a
Callable[[Request], Request], and AuthBase implements that with the __call__
method. However, mypy isn't currently smart enough to infer that __call__
implies Callable[2]. In the interim (and perhaps also to add clearer errors),
explicitly support AuthBase.
Additionally, this adds typing of AuthBase.__call__, to match the
Callable[[Request], Request] declaration used elsewhere.
[1] http://docs.python-requests.org/en/master/user/advanced/#custom-authentication
[2] https://github.com/python/mypy/issues/797
* Allow `requests.post` to accept `Dict[str, str]` for `data`.
For example:
```python
import requests
requests.post('https://www.foo.bar', data={'hello': 'world'})
```
Failes to type check in Python 2 even though it's fine.
* Explode str/Text combinations
* Fix lint
* Simplify iterable parameter for data
* Make requests.Response.iter_content allow None
According to the docstring:
> chunk_size must be of type int or None
* Combine and alphabetize import statement
Jelle Zijlstra