Base

Data models - Base Pydantic model with custom methods.

BaseCells (UserList, Generic)

Base abstract class for notebook cells.

Source code in databooks/data_models/base.py

class BaseCells(UserList, Generic[T]):
    """Base abstract class for notebook cells."""

    @abstractmethod
    def resolve(self, **kwargs: Any) -> list:
        """Return valid notebook cells from differences."""
        raise NotImplementedError

resolve(self, **kwargs)

Return valid notebook cells from differences.

Source code in databooks/data_models/base.py

@abstractmethod
def resolve(self, **kwargs: Any) -> list:
    """Return valid notebook cells from differences."""
    raise NotImplementedError

DatabooksBase (BaseModel) pydantic-model

Base Pydantic class with extras on managing fields.

Source code in databooks/data_models/base.py

class DatabooksBase(BaseModel):
    """Base Pydantic class with extras on managing fields."""

    class Config:
        """Default configuration for base class."""

        extra = Extra.allow

    def remove_fields(
        self,
        fields: Iterable[str],
        *,
        recursive: bool = False,
        missing_ok: bool = False,
    ) -> None:
        """
        Remove selected fields.

        :param fields: Fields to remove
        :param recursive: Whether or not to remove the fields recursively in case of
         nested models
        :return:
        """
        d_model = dict(self)
        for field in fields:
            field_val = d_model.get(field) if missing_ok else d_model[field]
            if recursive and isinstance(field_val, DatabooksBase):
                field_val.remove_fields(fields)
            elif field in d_model:
                delattr(self, field)

    def __str__(self) -> str:
        """Return outputs of __repr__."""
        return repr(self)

    def __sub__(self, other: DatabooksBase) -> DiffModel:
        """
        Subtraction between `databooks.data_models.base.DatabooksBase` objects.

        The difference basically return models that replace each fields by a tuple,
         where for each field we have `field = (self_value, other_value)`
        """
        if type(self) != type(other):
            raise TypeError(
                f"Unsupported operand types for `-`: `{type(self).__name__}` and"
                f" `{type(other).__name__}`"
            )

        # Get field and values for each instance
        self_d = dict(self)
        other_d = dict(other)

        # Build dict with {field: (type, value)} for each field
        fields_d: Dict[str, Any] = {}
        for name in self_d.keys() | other_d.keys():
            self_val = self_d.get(name)
            other_val = other_d.get(name)
            if type(self_val) is type(other_val) and all(
                isinstance(val, (DatabooksBase, BaseCells))
                for val in (self_val, other_val)
            ):
                # Recursively get the diffs for nested models
                fields_d[name] = (Any, self_val - other_val)  # type: ignore
            else:
                fields_d[name] = (tuple, (self_val, other_val))

        # Build Pydantic models dynamically
        DiffInstance = create_model(
            "Diff" + type(self).__name__,
            __base__=type(self),
            resolve=resolve,
            is_diff=True,
            **fields_d,
        )
        return cast(DiffModel, DiffInstance())  # it'll be filled in with the defaults

Config

Default configuration for base class.

Source code in databooks/data_models/base.py

class Config:
    """Default configuration for base class."""

    extra = Extra.allow

__str__(self) special

Return outputs of repr.

Source code in databooks/data_models/base.py

def __str__(self) -> str:
    """Return outputs of __repr__."""
    return repr(self)

__sub__(self, other) special

Subtraction between databooks.data_models.base.DatabooksBase objects.

The difference basically return models that replace each fields by a tuple, where for each field we have field = (self_value, other_value)

Source code in databooks/data_models/base.py

def __sub__(self, other: DatabooksBase) -> DiffModel:
    """
    Subtraction between `databooks.data_models.base.DatabooksBase` objects.

    The difference basically return models that replace each fields by a tuple,
     where for each field we have `field = (self_value, other_value)`
    """
    if type(self) != type(other):
        raise TypeError(
            f"Unsupported operand types for `-`: `{type(self).__name__}` and"
            f" `{type(other).__name__}`"
        )

    # Get field and values for each instance
    self_d = dict(self)
    other_d = dict(other)

    # Build dict with {field: (type, value)} for each field
    fields_d: Dict[str, Any] = {}
    for name in self_d.keys() | other_d.keys():
        self_val = self_d.get(name)
        other_val = other_d.get(name)
        if type(self_val) is type(other_val) and all(
            isinstance(val, (DatabooksBase, BaseCells))
            for val in (self_val, other_val)
        ):
            # Recursively get the diffs for nested models
            fields_d[name] = (Any, self_val - other_val)  # type: ignore
        else:
            fields_d[name] = (tuple, (self_val, other_val))

    # Build Pydantic models dynamically
    DiffInstance = create_model(
        "Diff" + type(self).__name__,
        __base__=type(self),
        resolve=resolve,
        is_diff=True,
        **fields_d,
    )
    return cast(DiffModel, DiffInstance())  # it'll be filled in with the defaults

remove_fields(self, fields, *, recursive=False, missing_ok=False)

Remove selected fields.

Parameters:

Name	Type	Description	Default
fields	Iterable[str]	Fields to remove	required
recursive	bool	Whether or not to remove the fields recursively in case of nested models	False

Returns:

Type	Description
None

Source code in databooks/data_models/base.py

def remove_fields(
    self,
    fields: Iterable[str],
    *,
    recursive: bool = False,
    missing_ok: bool = False,
) -> None:
    """
    Remove selected fields.

    :param fields: Fields to remove
    :param recursive: Whether or not to remove the fields recursively in case of
     nested models
    :return:
    """
    d_model = dict(self)
    for field in fields:
        field_val = d_model.get(field) if missing_ok else d_model[field]
        if recursive and isinstance(field_val, DatabooksBase):
            field_val.remove_fields(fields)
        elif field in d_model:
            delattr(self, field)

DiffModel (Protocol, Iterable, Generic)

Protocol for mypy static type checking.

Source code in databooks/data_models/base.py

class DiffModel(Protocol, Iterable):
    """Protocol for mypy static type checking."""

    is_diff: bool

    def resolve(self, *args: Any, **kwargs: Any) -> DatabooksBase:
        """Protocol method that returns a valid base object."""

resolve(self, *args, **kwargs)

Protocol method that returns a valid base object.

Source code in databooks/data_models/base.py

def resolve(self, *args: Any, **kwargs: Any) -> DatabooksBase:
    """Protocol method that returns a valid base object."""

resolve(model, *, keep_first=True, ignore_none=True, **kwargs)

Resolve differences for 'diff models'.

Return instance alike the parent class databooks.data_models.Cell.DatabooksBase.

Parameters:

Name	Type	Description	Default
model	DiffModel | BaseCells	DiffModel that is to be resolved (self when added as a method to a class	required
keep_first	bool	Whether to keep the information from the prior in the 'diff model' or the later	True
ignore_none	bool	Whether or not to ignore None values if encountered, and use the other field value	True

Returns:

Type	Description
DatabooksBase | List[T]	Model with selected fields from the differences

Source code in databooks/data_models/base.py

def resolve(
    model: DiffModel | BaseCells,
    *,
    keep_first: bool = True,
    ignore_none: bool = True,
    **kwargs: Any,
) -> DatabooksBase | List[T]:
    """
    Resolve differences for 'diff models'.

    Return instance alike the parent class `databooks.data_models.Cell.DatabooksBase`.
    :param model: DiffModel that is to be resolved (self when added as a method to a
     class
    :param keep_first: Whether to keep the information from the prior in the
     'diff model' or the later
    :param ignore_none: Whether or not to ignore `None` values if encountered, and
     use the other field value
    :return: Model with selected fields from the differences
    """
    field_d = dict(model)
    is_diff = field_d.pop("is_diff")
    if not is_diff:
        raise TypeError("Can only resolve dynamic 'diff models' (when `is_diff=True`).")

    res_vals: Dict[str, Any] = {}
    for name, value in field_d.items():
        if isinstance(value, (DiffModel, BaseCells)):
            res_vals[name] = value.resolve(
                keep_first=keep_first, ignore_none=ignore_none, **kwargs
            )
        else:
            res_vals[name] = (
                value[keep_first]
                if value[not keep_first] is None and ignore_none
                else value[not keep_first]
            )

    return type(model).mro()[1](**res_vals)