Handle class instances in stub generator

[npow]

Stub generator fails to handle something like the following where there's a class instance as a default argument:

def identity(data: MDF, parameters: FunctionParameters = FunctionParameters()) -> MDF:
    return data

Traceback:

STDERR:
Traceback (most recent call last):
File "/root/metaflow/metaflow_extensions/nflx/plugins/functions/function_parameters.py", line 65, in getattr
return self[name]
File "/root/metaflow/metaflow_extensions/nflx/plugins/functions/function_parameters.py", line 61, in getitem
return self._data[name]
File "/root/metaflow/metaflow_extensions/nflx/plugins/functions/function_parameters.py", line 24, in getitem
raise KeyError(f"Artifact '{key}' not found in FunctionParameters.")
KeyError: "Artifact 'name' not found in FunctionParameters."

[talsperre]

How did you go about testing it?

[npow]

How did you go about testing it?

python -m metaflow.cmd.main_cli develop stubs install --force

opened up the metaflow-stubs/mf_extensions/nflx/plugins/dataframe_function.pyi file and looked at it

[romain-intel]

LGTM