Hi, I find @save_to a bit strange... I'm using 1.62, and I follow the manual and code like this:

@save_to.pickle(path="pickle_entry_point.pkl")
def entry_point(freq: float, phase: float) -> np.ndarray:
    return np.sin(freq * np.linspace(0, 2 * np.pi, 100) + phase)

According to the manual, I also need extra arguments

output_name

, but when I add it, it raises an error:

hamilton.function_modifiers.base.InvalidDecoratorException: Extra parameters for loader: <class 'hamilton.io.default_data_loaders.PickleSaver'> {'output_name'}. Choices for parameters are: dict_keys(['path'])

. Also, I use a materializer, and I don't know how to "call" this save in dr. materialize... Can you help me fix it?

@Roy Kid where in the documentation are you referring to? Otherwise what you have looks correct.

OHHH, it is

output_name_

with underscore not

output_name

!

what I would add is the following:

@save_to.pickle(path="pickle_entry_point.pkl", output_name_="entry_point_pickle")
def entry_point(freq: float, phase: float) -> np.ndarray:
    return np.sin(freq * np.linspace(0, 2 * np.pi, 100) + phase)

you’d request this as part of the

additional_vars=["entry_point_pickle"]

if you are using

.materialize()

😭 The error message is a little bit vague. It looks like it only takes

path

. Sorry for bothering you