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Docs/ API Reference/ Engine/ add
Engine· method

Engine.add

adds an entity to the project and returns the engine for chaining

Python
add(entity: Entity) -> Engine

Returns Engine — the same engine, so `add()` calls chain

Parameters#

name type default description
entity Entity — the entity to add to the project

Example#

Python
from lsdtools import Engine, Entity

engine = Engine("survey.lsd")
engine.add(Entity("sales")).add(Entity("report"))

Notes#

add returns the engine (not the entity), so calls chain — engine.add(a).add(b) stays typed as Engine. To fetch an entity back by name later, use get.

See also#

API: get · run · save · Engine

Guides: Your first tool

By LSD Team · Last updated Jul 17, 2026 Ask on Discord View as Markdown