TypeError: make() got an unexpected keyword argument 'many'

I’m attempting to run your marshmallow_example.py example, but keep running into this error:

...
File "/Users/SomeProject/venv/lib/python3.7/site-packages/marshmallow/schema.py", line 835, in _do_load
    partial=partial,
  File "/Users/SomeProject/venv/lib/python3.7/site-packages/marshmallow/schema.py", line 1014, in _invoke_load_processors
    partial=partial,
  File "/Users/SomeProject/venv/lib/python3.7/site-packages/marshmallow/schema.py", line 1135, in _invoke_processors
    data = processor(data, many=many, **kwargs)
TypeError: make() got an unexpected keyword argument 'many'

I also had to update the get method to post in this block to get past the error: TypeError: Failed to execute 'fetch' on 'Window': Request with GET/HEAD method cannot have body.

@api.route("/restplus/make_a_widget")
    class WidgetResource(Resource):
        @accepts(
            "Doodad", dict(name="some_arg", type=str), schema=DoodadSchema, api=api
        )
        @responds("Widget", schema=WidgetSchema, api=api)
        def post(self):
            from flask import jsonify

            return request.parsed_obj

[apryor6]

Issue has been resolved.

The error was purely in the example code, and not the library itself, so no updated installation is required. Simply use this file

The bug was that the API for post_load has changed in marshmallow 3. The updated example uses this properly. I also simplified the example a bit to use dataclasses so there is less clutter. Let me know if there are other issues.

[Fail-Safe]

Many thanks for looking into this. Being new to Marshmallow, myself, I did not think to check into the post_load syntax change. Now that the example is working for me, I’m going to dive deep into this.

Thanks!