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annotate service/mqtt_to_rdf/candidate_binding.py @ 1632:bd79a2941cab

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just (a lot of) debug changes
author drewp@bigasterisk.com
date Sun, 12 Sep 2021 21:46:39 -0700
parents e24058ae4806
children ba59cfc3c747
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1632
bd79a2941cab just (a lot of) debug changes
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diff changeset
1 import logging
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2 from dataclasses import dataclass
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3 from typing import Dict, Iterable, Iterator, Union
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4
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5 from prometheus_client import Summary
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6 from rdflib import BNode, Graph
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7 from rdflib.term import Node, Variable
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8
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9 from inference_types import BindableTerm, BindingUnknown, Triple
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10 log = logging.getLogger()
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11 INDENT = ' '
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12
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13 @dataclass
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14 class CandidateBinding:
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15 binding: Dict[BindableTerm, Node]
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16
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17 def __repr__(self):
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18 b = " ".join("%s=%s" % (k, v) for k, v in sorted(self.binding.items()))
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19 return f'CandidateBinding({b})'
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20
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21 def apply(self, g: Union[Graph, Iterable[Triple]], returnBoundStatementsOnly=True) -> Iterator[Triple]:
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22 for stmt in g:
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23 try:
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24 bound = (
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25 self._applyTerm(stmt[0], returnBoundStatementsOnly),
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26 self._applyTerm(stmt[1], returnBoundStatementsOnly),
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27 self._applyTerm(stmt[2], returnBoundStatementsOnly))
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28 except BindingUnknown:
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29 log.debug(f'{INDENT*7} CB.apply cant bind {stmt} using {self.binding}')
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30
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31 continue
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32 log.debug(f'{INDENT*7} CB.apply took {stmt} to {bound}')
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33
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34 yield bound
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35
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36 def _applyTerm(self, term: Node, failUnbound=True):
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37 if isinstance(term, (Variable, BNode)):
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38 if term in self.binding:
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39 return self.binding[term]
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40 else:
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41 if failUnbound:
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42 raise BindingUnknown()
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43 return term
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44
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45 def addNewBindings(self, newBindings: 'CandidateBinding'):
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46 for k, v in newBindings.binding.items():
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47 if k in self.binding and self.binding[k] != v:
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48 raise ValueError(f'conflict- thought {k} would be {self.binding[k]} but another Evaluation said it should be {v}')
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49 self.binding[k] = v