Restructuring

[znicholls]

To change:

• use nc file attributes, not filenames
• use marshmallow or something like https://stackoverflow.com/questions/3262569/validating-a-yaml-document-in-python or the below as validation schema for json files

from marshmallow import Schema, fields

class AssertSchema(Schema):
    variable = fields.String(required=True)
    expected = fields.Float(required=True)
    threshold = fields.Float()
    year = fields.Integer(default=2100)
    region = fields.String(default='GLOBAL')

class TestSchema(Schema):
    name = fields.String(required=True)
    start_year = fields.Integer(default=1750)
    end_year = fields.Integer(default=2100)
    asserts = fields.Nested(AssertSchema, many=True) 

class CollectionSchema(Schema):
    base_config = fields.String(required=True)
    tests = fields.Nested(TestSchema, many=True)

validated = CollectionSchema(strict=True).load(config)

[znicholls]

Full details in loading section of https://marshmallow.readthedocs.io/en/3.0/quickstart.html#deserializing-objects-loading

[znicholls]

done in various merge requests