janus:py_is_object/1

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Predicate py_is_object/1

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py_is_object(@Term) is semidet

True when Term is a Python object reference. Fails silently if Term is any other Prolog term.

Errors: - existence_error(py_object, Term) is raised of Term is a Python object, but it has been freed using py_free/1.
Compatibility: - PIP. The SWI-Prolog implementation is safe in the sense that an arbitrary term cannot be confused with a Python object and a reliable error is generated if the references has been freed. Portable applications can not rely on this.