archimedes.tree.struct.replace

archimedes.tree.struct.replace(obj, /, **changes)

Return a new object replacing specified fields with new values.

This is especially useful for frozen classes. Example usage:

@dataclass(frozen=True)
class C:
    x: int
    y: int

c = C(1, 2)
c1 = replace(c, x=3)
assert c1.x == 3 and c1.y == 2