On 12/21/17 6:25 AM, Sven R. Kunze wrote:
On 21.12.2017 11:22, Terry Reedy wrote:
@dataclass
class C:
a: int # integer field with no default
b: float = 0.0 # float field with a default
And the types will be recognized by type checkers such as mypy.
And I think the non-typed examples should go first in the docs.
I still don't understand why "I don't care" can be defined by "leaving out"
@dataclass
class C:
b = 0.0 # float field with a default
Because you can't know the order that x and y are defined in this example:
class C:
x: int
y = 0
'x' is not in C.__dict__, and 'y' is not in C.__annotations__.
Someone will suggest a metaclass, but that has its own problems. Mainly,
interfering with other metaclasses.
Eric.
For non-default fields, I like ellipsis too.
Cheer,
Sven
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