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stubgen with attrs class not producing expected __init__.py output #9327
Description
When I generate stubs using mypy's stubgen I find that I am forced to use the attrib = attr.ib(...) to get the stub for init to have the attributes in them. Even then the typing information for the attributes are wrong.
When I do
@attr.s(auto_attribs = True)
class Dummy:
var: str
and run stubgen against it.
The stub I get looks like
def __init__(self)->None
I expect
def __init__(self, var: str)->None
If I do
@attr.s()
class Dummy:
var: str = attr.ib()
var2 = attr.ib(type:str)
I get closer to the expected output, but it is missing the type information
def __init__(self, var: Any, var2: Any)->None
Activity
ilevkivskyi commentedon Sep 8, 2020
Hm, this looks like a bug. But maybe a better behavior would be to preserve the class decorator completely, since
attrsare treated in quite special way by mypy.cdce8p commentedon Jan 8, 2025
This was fixed in #18418 (Included in the next release.) and will be further improved by #18430.
Note that you cannot use the shorthand since mypy doesn't resolve it. It will work with
attr.attrs/attrs.defineandattr.attrib/attrs.field.