Class janus.apply() is
similar to janus.apply_once(),
calling a Prolog predicate using functional notation style. It returns a
Python iterator that enumerates all answers.
- apply janus.apply(module,
predicate, *input)
- As janus.apply_once(),
returning an iterator that returns individual answers. The
example below uses Python
list comprehension to create a list of integers from the Prolog
built-in between/3.
>>> list(janus.apply("user", "between", 1, 6))
[1, 2, 3, 4, 5, 6]
- Compatibility
- PIP.
- any
|None janus.apply.next() - Explicitly ask for the next solution of the iterator. Normally, using
the
apply as an iterator is to be preferred. See discussion
above. Note that this calling convention cannot distinguish between the
Prolog predicate returning @none and reaching the end of
the iteration.
- None janus.apply.close()
- Close the query. Closing a query is obligatory. When used as an
iterator, the Python destructor (__del__()) takes care of closing
the query.
- Compatibility
- PIP.
