deirokay.parser.reader.DataReader

class deirokay.parser.reader.DataReader[source]

Bases: MultiBackendMixin

Helper class to load data from a data source in function of the backend.

Methods

`attach_backend`	Generate a subclass that concretizes multibackend backend methods into their intended name.
`get_backend`	Get current active backend for this class.
`register_backend_method`	Proxy for register_backend_method to register an existing function as a backend-specific method.

Attributes

`supported_backends`	Backends supported by this resource.
`read`

classmethod __post_attach_backend__(): This classmethod can be optionally overwritten to serve as a callback function for when the attach_backend() method is called.

classmethod attach_backend(backend: Backend) → Type[_AnyMultiBackendClass]

Generate a subclass that concretizes multibackend backend methods into their intended name. The methods marked with the given backend will compose the returned class.

Parameters

cls (type) – Class to be subclassed with the given backend.
backend (Backend) – Backend to be selected.

Returns

Subclass of the current class with methods filtered for the given backend.

Return type

Type[MultiBackendMixin]

classmethod get_backend() → Backend

Get current active backend for this class.

Returns: The current active backend.
Return type: Backend
Raises: InvalidBackend – Backend not set or not a valid execution class.

read: DeirokayReadCallable

classmethod register_backend_method(alias_for: str, func: Callable[[...], Any], backend: Backend) → None

Proxy for register_backend_method to register an existing function as a backend-specific method.

Parameters

alias_for (str) – The name of the method to be substituted with a backend-specific version.
func (AnyCallable) – Existing function to be registered as a method.
backend (Backend) – Backend for the method.

supported_backends: List[Backend] = [<Backend.PANDAS: 'pandas'>, <Backend.DASK: 'dask'>]

Backends supported by this resource.

Type: List[Backend]