Type hinting/annotation style

[roykoand]

Is there any type hinting style in datacontract-cli?

What do you think about usage of type hinting libraries/checkers in the CI of this repo? mypy?

Data contract specification module is a good example. Some Pydantic models are type hinted without using typing.Optional

datacontract-cli/datacontract/model/data_contract_specification.py

Lines 87 to 100 in ee32b10

	ref: str = pyd.Field(default=None, alias="$ref")
	ref_obj: Definition = pyd.Field(default=None, exclude=True)
	title: str = None
	type: str = None
	format: str = None
	required: bool = None
	primary: bool = None
	unique: bool = None
	references: str = None
	description: str = None
	pii: bool = None
	classification: str = None
	pattern: str = None
	minLength: int = None

and some with:

datacontract-cli/datacontract/model/data_contract_specification.py

Lines 124 to 128 in ee32b10

	description: Optional[str] = None
	type: Optional[str] = None
	namespace: Optional[str] = None
	title: Optional[str] = None
	fields: Dict[str, Field] = {}

[jochenchrist]

Certainly, a good idea.
Open to discuss mypy.

Would you be interested in preparing a PR?

[roykoand]

@jochenchrist sure, would love to work on this but can't guarantee a quick work done. We probably ought to exclude some of the mypy checks... will see and discuss in PR!