Dataclass extension

The standard library dataclasses module does not allow to define non-default arguments after default arguments. You can use databind.core.dataclasses as a drop-in replacement to get this feature. It behaves exactly like the standard library, only that non-default arguments may follow default arguments. Such arguments can be passed to the constructor as positional or keyword arguments.

Note

You will loose Mypy type checking support for dataclasses decorated with databind.core.dataclasses.dataclass.

from databind.core import dataclasses

@dataclasses.dataclass
class A:
  value1: int = 42

@dataclasses.dataclass
class B(A):
  value2: str

print(B(0, 'Hello, World!'))
print(B(value2='Answer to the universe'))