key/2

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Predicate key/2

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Availability::- use_module(library(janus)).

Source

[nondet]key(+Dict, ?Key)

True when Key is a key in Dict. Backtracking enumerates all known keys.

Compatibility: PIP. Note that this predicate handle a SWI-Prolog dict, a {k:v, ...} term as well as py({k:v, ...}.

History

Introduced in 9.1.13 (👉3496da8) ``setup.py``, turning the repo into an installable Python package