New submission from Brett Cannon:
When there are no keyword-only arguments, the value of kw_defaults for
FunctionDef is []. But when keyword-only arguments are present with no default
values, it becomes [None]. That's bad as every other value in FunctionDef has a
default of [] when there is nothing of value there (currently you can trust
that [None] means no default value as None isn't anything in the AST).
>>> ast.dump(ast.parse('def func(*, name):pass'))
"Module(body=[FunctionDef(name='func', args=arguments(args=[], vararg=None,
varargannotation=None, kwonlyargs=[arg(arg='name', annotation=None)],
kwarg=None, kwargannotation=None, defaults=[], kw_defaults=[None]),
body=[Pass()], decorator_list=[], returns=None)])"
>>> ast.dump(ast.parse('def func(name):pass'))
"Module(body=[FunctionDef(name='func', args=arguments(args=[arg(arg='name',
annotation=None)], vararg=None, varargannotation=None, kwonlyargs=[],
kwarg=None, kwargannotation=None, defaults=[], kw_defaults=[]), body=[Pass()],
decorator_list=[], returns=None)])"
----------
components: Library (Lib)
keywords: 3.3regression
messages: 176260
nosy: brett.cannon
priority: normal
severity: normal
stage: test needed
status: open
title: ast.FunctionDef sets a bad value for kw_defaults when keyword-only
arguments present
versions: Python 3.3, Python 3.4
_______________________________________
Python tracker <[email protected]>
<http://bugs.python.org/issue16545>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
