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.. module:: ezdxf.entitydb
Entity Database
===============
The :class:`EntityDB` is a simple key/value database to store
:class:`~ezdxf.entities.DXFEntity` objects by it's handle,
every :class:`~ezdxf.document.Drawing` has its own :class:`EntityDB`, stored in
the :class:`Drawing` attribute :attr:`~ezdxf.document.Drawing.entitydb`.
Every DXF entity/object, except tables and sections, are represented as
:class:`DXFEntity` or inherited types, this entities are stored in the
:class:`EntityDB`, database-key is the :attr:`dxf.handle` as plain hex
string.
All iterators like :meth:`keys`, :meth:`values`, :meth:`items` and :meth:`__iter__`
do not yield destroyed entities.
.. warning::
The :meth:`get` method and the index operator ``[]``, return destroyed
entities and entities from the trashcan.
.. class:: EntityDB
.. automethod:: __getitem__(handle: str) -> DXFEntity
.. automethod:: __setitem__(handle: str, entity: DXFEntity) -> None
.. automethod:: __delitem__
.. automethod:: __contains__(item: Union[str, DXFEntity]) -> bool
.. automethod:: __len__
.. automethod:: __iter__
.. automethod:: get(handle: str) -> Optional[DXFEntity]
.. automethod:: next_handle
.. automethod:: keys
.. automethod:: values() -> Iterable[DXFEntity]
.. automethod:: items() -> Iterable[Tuple[str, DXFEntity]]
.. automethod:: add(entity: DXFEntity) -> None
.. automethod:: new_trashcan
.. automethod:: trashcan
.. automethod:: purge
.. automethod:: query
Entity Space
============
.. autoclass:: EntitySpace
.. automethod:: __iter__() -> Iterable[DXFEntity]
.. automethod:: __getitem__(index) -> DXFEntity
.. automethod:: __len__
.. automethod:: has_handle
.. automethod:: purge
.. automethod:: add(entity: DXFEntity) -> None
.. automethod:: extend(entities: Iterable[DXFEntity]) -> None
.. automethod:: remove(entity: DXFEntity) -> None
.. automethod:: clear
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