Types

.. module:: dagster

Dagster type system.

Builtin Types

.. autoclass:: Any

No rules. No fear. No limits.

.. autoclass:: Bool

Validates at runtime time that isinstance(value, bool)

.. autoclass:: Int

Validates at runtime time that isinstance(value, six.integer_types)

.. autoclass:: Float

Validates at runtime time that isinstance(value, float)

.. autoclass:: String

Validates at runtime time that isinstance(value, six.string_types)

.. autoclass:: Path

Same validation as String, useful for communicating that this string represents a file path.

.. autoclass:: Nothing

A way to establish execution dependencies without communicating values. When a solid uses :py:class:InputDefinition of type Nothing, no parameters are passed to to the transform_fn for that input.

.. autofunction:: Nullable

.. autofunction:: List

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Config Types

The following types are used to describe the schema of configuration data via config_field. They are used in conjunction with the builtin types above.

.. autofunction:: Field

.. autofunction:: Dict

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Making New Types

.. autofunction:: as_dagster_type

.. autofunction:: dagster_type

.. autoclass:: PythonObjectType

.. autoclass:: RuntimeType

.. autoclass:: ConfigType

.. autofunction:: NamedDict

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Schema

.. autofunction:: Selector

.. autofunction:: NamedSelector

.. autofunction:: input_schema

.. autofunction:: input_selector_schema

.. autofunction:: output_schema

.. autofunction:: output_selector_schema