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|
**************************
What's New In Pylint 1.9
**************************
:Release: 1.9
:Date: 2018-05-15
Summary -- Release highlights
=============================
* None so far
New checkers
============
* A new Python 3 checker was added to warn about the removed ``operator.div`` function.
* A new Python 3 checker was added to warn about accessing functions that have been
moved from the urllib module in corresponding subpackages, such as ``urllib.request``.
.. code-block:: python
from urllib import urlencode
Instead the previous code should use ``urllib.parse`` or ``six.moves`` to import a
module in a Python 2 and 3 compatible fashion:
.. code-block:: python
from six.moves.urllib.parse import urlencode
To have this working on Python 3 as well, please use the ``six`` library:
.. code-block:: python
six.reraise(Exception, "value", tb)
* A new check was added to warn about using unicode raw string literals. This is
a syntax error in Python 3:
.. code-block:: python
a = ur'...'
* Added a new ``deprecated-sys-function`` check, emitted when accessing removed ``sys`` members.
* Added ``xreadlines-attribute`` check, emitted when the ``xreadlines()`` attribute is accessed
on a file object.
* Added two new Python 3 porting checks, ``exception-escape`` and ``comprehension-escape``
These two are emitted whenever pylint detects that a variable defined in the
said blocks is used outside of the given block. On Python 3 these values are deleted.
.. code-block:: python
try:
1/0
except ZeroDivisionError as exc:
...
print(exc) # This will raise a NameError on Python 3
[i for i in some_iterator if some_condition(i)]
print(i) # This will raise a NameError on Python 3
Other Changes
=============
* ``defaultdict`` and subclasses of ``dict`` are now handled for `dict-iter-*` checks. That
means that the following code will now emit warnings for when ``iteritems`` and friends
are accessed:
.. code-block:: python
some_dict = defaultdict(list)
...
some_dict.iterkeys()
* Enum classes no longer trigger ``too-few-methods``
* Special methods now count towards ``too-few-methods``,
and are considered part of the public API.
They are still not counted towards the number of methods for
``too-many-methods``.
* docparams allows abstract methods to document returns documentation even
if the default implementation does not return something.
They also no longer need to document raising a NotImplementedError.
|
