AttributeError: can’t set attribute

This answer doesn’t address the specifics of this question, but explains the underlying issue.
This specific exception “AttributeError: can’t set attribute” is raised (see source) when the attribute you’re attempting to change is actually a property that doesn’t have a setter. If you have access to the library’s code, adding a setter would solve the problem.

EDIT: updated source link to new location in the code.

Edit2:

Example of a setter:

class MAMLMetaLearner(nn.Module):
    def __init__(
            self,
            args,
            base_model,

            inner_debug=False,
            target_type="classification"
    ):
        super().__init__()
        self.args = args  # args for experiment
        self.base_model = base_model
        assert base_model is args.model

        self.inner_debug = inner_debug
        self.target_type = target_type

    @property
    def lr_inner(self) -> float:
        return self.args.inner_lr

    @lr_inner.setter
    def lr_inner(self, new_val: float):
        self.args.inner_lr = new_val