Sandbox — LSD is in active testing. All systems operational·payments are test-mode (no real charges).

Overview Use Cases News Docs Tool Store Support Community Get LSD

API Reference

lsdtools API reference

Authoring

Data

Table
Column
Properties
- arrow
Methods
- is_null
- is_valid

Views

Runtime

Tool Packaging

Column.is_null

a bool column, true where the value is null

Python

is_null() -> Column

Returns Column — a boolean Column, true where the value is null

Example#

Python

t.filter(t["score"].is_null())      # keep only the rows missing a score

Notes#

Produces a boolean Column (a mask) you pass to filter. It is the exact complement of is_valid. For a per-column count of nulls across the whole table, use Table.null_report.

Example#

Notes#

See also#