Calculator

A basic calculator for OVOS - "what is 15 times 23", "what is the square root of 144", "what is 20 percent of 150". Fully offline, pure arithmetic, no external dependencies beyond number parsing.

Usage

"what is 5 plus 3"
"what is 15 times 23"
"what is 100 divided by 4"
"what is 20 percent of 150"
"what is 9 squared"
"what is the square root of 144"
"hvad er 5 plus 3"                (Danish)
"hvad er kvadratroden af 144"     (Danish)

Why one intent file per operation

A single intent like "what is {a} {operator} {b}", with the operator word captured as a wildcard, does not work reliably in padatious: with three consecutive wildcards and no literal anchor word between {a}, {operator}, and {b}, the matcher can't tell where one wildcard ends and the next begins. Each operation gets its own intent file instead, with the operator as literal text - the same anchor-word pattern every other intent in this project family uses (e.g. ovos-skill-convert's "convert {value} {from_unit} to {to_unit}").

A rough edge fixed here (tracked as an issue elsewhere)

ovos-skill-convert has an open issue for a cosmetic rough edge: whole-number results spoken with a trailing ".0" (e.g. "10.0" instead of "10"), because Python's default float formatting was used as-is. This skill avoids the problem from the start with a small _format_number() helper - a whole-number float speaks as a plain integer, a genuine fraction rounds to 4 decimal places. Worth porting the same helper over when that issue is picked up.

Common Query safety net

"what is 5 times 6" is structurally identical to the "what is X" questions confirmed to sometimes get intercepted by a platform-level semantic router (ovos-m2v-pipeline-high) before this skill's own Padatious intents get a chance - see ovos-skill-geometry's DEVELOPMENT.md for the full live-tested finding. handle_common_query() reuses the exact literal anchor words each intent file already has (plus/minus/times/...) as regex patterns, so it's not a second implementation of the arithmetic parsing, just a fallback entry point into it.

Install

pip install ovos-skill-calculator

Development

See DEVELOPMENT.md.

Category

Utility

Tags

#calculator #math #arithmetic