iSharkFly-Open
/
python-peps
mirror of https://github.com/python/peps.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Make type information on make_dataclass() optional.

This commit is contained in:
Eric V. Smith 2018-01-06 15:13:03 -05:00
parent a790b3821c
commit b78c28504e
1 changed files with 13 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
pep-0557.rst
View File

@ -6,7 +6,7 @@ Type: Standards Track
Content-Type: text/x-rst
Created: 02-Jun-2017
Python-Version: 3.7
Post-History: 08-Sep-2017, 25-Nov-2017, 30-Nov-2017, 01-Dec-2017, 02-Dec-2017
Post-History: 08-Sep-2017, 25-Nov-2017, 30-Nov-2017, 01-Dec-2017, 02-Dec-2017, 06-Jan-2018
Resolution: https://mail.python.org/pipermail/python-dev/2017-December/151034.html
Notice for Reviewers
@ -576,15 +576,19 @@ Module level helper functions
- ``make_dataclass(cls_name, fields, *, bases=(), namespace=None)``:
Creates a new Data Class with name ``cls_name``, fields as defined
in ``fields``, base classes as given in ``bases``, and initialized
with a namespace as given in ``namespace``. This function is not
strictly required, because any Python mechanism for creating a new
class with ``__annotations__`` can then apply the ``dataclass``
function to convert that class to a Data Class. This function is
provided as a convenience. For example::
with a namespace as given in ``namespace``. ``fields`` is an
iterable whose elements are either ``name``, ``(name, type)``, or
``(name, type, Field)``. If just ``name`` is supplied,
``typing.Any`` is used for ``type``. This function is not strictly
required, because any Python mechanism for creating a new class with
``__annotations__`` can then apply the ``dataclass`` function to
convert that class to a Data Class. This function is provided as a
convenience. For example::
C = make_dataclass('C',
[('x', int),
('y', int, field(default=5))],
'y',
('z', int, field(default=5))],
namespace={'add_one': lambda self: self.x + 1})
Is equivalent to::
@ -592,7 +596,8 @@ Module level helper functions
@dataclass
class C:
x: int
y: int = 5
y: 'typing.Any'
z: int = 5
def add_one(self):
return self.x + 1