>> It doesn't look like I can add the variables using an optional argument:
>
>It would be strange if such argument hasn't been ported. Any idea about
>that Vitaly (or someone else)?
Yes it is ported, the name of the parameter is `vardecl`. I believe the
following should work:
```
variables = VariableList(VariableNode("origin"),
VariableNode("destination"))
chainer = BackwardChainer(atomspace, rbs, query,
vardecl=variables)
```
>Vitaly, please tell Alex how to set the ure logger level if he doesn't
>know how.
URE logger is not ported into Python API, the simplest way to set its level
I know is:
```
scheme_eval(atomspace, '(use-modules (opencog logger) (opencog ure))')
scheme_eval(atomspace, '(cog-logger-set-level! (cog-ure-logger)
"DEBUG")')
```
>Also how can we find documentation about the Python API of the
>URE (I probably should learn it as well)?
There is no specific about Python API for URE it copies C++ API as far as I
know.
There is an example on Python OpenCog API wiki:
https://wiki.opencog.org/w/Python#Backward_Chainer
One can also look at unit tests:
https://github.com/opencog/ure/tree/master/tests/cython
Best regards,
Vitaly
On Monday, January 13, 2020 at 9:46:06 AM UTC+3, Nil wrote:
>
> Hi Alex, Vitaly,
>
> Alex, please set the level of the ure logger to debug and attach the log
> file here.
>
> Vitaly, please tell Alex how to set the ure logger level if he doesn't
> know how. Also how can we find documentation about the Python API of the
> URE (I probably should learn it as well)?
>
> Thanks,
> Nil
>
> On 1/11/20 12:50 AM, Alexander Gabriel wrote:
> >
> >
> > Am Freitag, 10. Januar 2020 22:44:45 UTC schrieb linas:
> >
> > I'm not sure what to make of the email below. By "query", do you
> > mean "run cog-execute! on a BindLink"?
> >
> >
> > I'm running this:
> >
> > |
> > queries = []
> >
> > # WARN: if I add this to the queries it adds the links to the
> > atomspace (as it should I guess)
> > # and proceeds to return the results for the just added links,
> > truth values differ over distances
> >
> >
> > queries.append(StateLink(
> > ConceptNode(config.robot_name),
> > VariableNode("origin")))
> >
> > queries.append(StateLink(
> > ConceptNode(config.picker_name),
> > VariableNode("destination")))
> >
> > queries.append(StateLink(
> > ListLink(VariableNode("picker"),
> > PredicateNode("seen_picking")),
> > ConceptNode("FALSE")))
> >
> > queries.append(StateLink(
> > ListLink(VariableNode("picker"),
> PredicateNode("has_crate")),
> > ConceptNode("FALSE")))
> >
> > queries.append(
> > EvaluationLink(
> > PredicateNode("linked"),
> > ListLink(
> >
> ConceptNode("WayPoint{:03d}".format(config.robot_pos)),
> >
> > ConceptNode("WayPoint{:03d}".format(config.picker_pos)))))
> >
> >
> > # this returns results only for predefined links, but even
> > there the truth value has zero confidence
> > queries.append(
> > AndLink(
> > StateLink(
> > ConceptNode(config.robot_name),
> > VariableNode("origin")),
> > StateLink(
> > ConceptNode(config.picker_name),
> > VariableNode("destination")),
> > StateLink(
> > ListLink(VariableNode("picker"),
> > PredicateNode("seen_picking")),
> > ConceptNode("FALSE")),
> > StateLink(
> > ListLink(VariableNode("picker"),
> > PredicateNode("has_crate")),
> > ConceptNode("FALSE")),
> > EvaluationLink(
> > PredicateNode("linked"),
> > ListLink(
> > VariableNode("origin"),
> > VariableNode("destination")))))
> >
> > for query in queries:
> > print("Query: {:}\n".format(query))
> > chainer = BackwardChainer(atomspace,
> > rbs,
> > query)
> > chainer.do_chain()
> > results = chainer.get_results()
> > print("Result {:}".format(results))
> > try:
> > print("Truth: {:}".format(results.get_out()[0].tv))
> > except:
> > pass
> > print("\n\n")
> > |
> >
> > here is a link to the rest of the code
> > <
> https://gist.github.com/alexander-gabriel/59f06eb3d0f2ffa02b161f9dbca1a12c>
> which
>
> > defines the contents of the atomspace.
> >
> > --
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> >
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>
> > <
> https://groups.google.com/d/msgid/opencog/7f1d2406-3902-4677-bf35-ebea7d64a0e8%40googlegroups.com?utm_medium=email&utm_source=footer>.
>
>
>
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