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API Reference

lsdtools API reference

Authoring

Tool
Context
Source
Properties
- spec
Class methods
- file
- of
- sql
Methods
- paths
- read

Data

Table
Column

Views

Runtime

Tool Packaging

Source.read

reads the source and returns its data as a table

Python

read() -> Table

Returns Table — the source's data as an immutable Table

Example#

Inside a load step, read() turns whatever the user picked into rows:

Python

from lsdtools import Tool, Source, Table

tool = Tool("io")

@tool.load(source_kinds=("file",))
def load_it(src: Source) -> Table:
    return src.read()

Or drive a load directly from a value source:

Python

Source.file("assays.csv").read()      # → a Table

Notes#

Files are read by extension — .csv via CSV, .parquet / .pq via Parquet — and custom kinds run their registered reader. Every call returns a new immutable Table.

Example#

Notes#

See also#