https://github.com/asottile/pyupgrade
> A tool to automatically upgrade syntax for newer versions of the
> language.
- Drop u str prefix
- Drop base object inheritance
- Drop args to super()
- Use set literals
- Use dict comprehension
- Use set comprehension
In Python 3, the default encoding of source files is utf-8. The encoding
cookie is now unnecessary and redundant so remove it. For more details,
see the docs:
https://docs.python.org/3/howto/unicode.html#the-string-type
> The default encoding for Python source code is UTF-8, so you can
> simply include a Unicode character in a string literal ...
Includes a fix for the flake8 header checks to stop expecting an
encoding cookie.
This lets napoleon render exceptions using the standard info field
syntax
```
:raises FooException: Some condition.
```
rather than the nonstandard
```
:raises: :exc:`FooException` -- Some condition.
```
Note that the previous approach was more forgiving if an explanatory
text was given in the Raises section without an actual exception class:
```
Raises
------
If something occurs.
```
would be rendered as
```
:raises: *If something occurs*
```
which is OK-ish but is now rendered as
```
:raises If something occurs.:
```
which is somewhat more nonsensical.
However neither the Google style guide nor numpydoc actually support
this form (they always have both the type and the description) so I
think the change is reasonable.
Google types now greedily match the closing parenthesis.
Also removed name from returns section in Google docstrings.
Instead, everything before the colon is treated as the type.
* rename a few test modules to make the names more consistent
* do not copy/use Sphinx from build/ (unnecessary without 2to3)
* use a temporary dir for *all* test projects, the source tree
will stay pristine that way (default is tests/build)
* speed up tests by ~3x by splitting up test projects and avoiding
rebuilds
