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Request for Comments: Small change to the BestMatch search algorithm #2092

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Request for Comments: Small change to the BestMatch search algorithm #2092

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9 changes: 9 additions & 0 deletions chatterbot/logic/best_match.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
from chatterbot.logic import LogicAdapter
from chatterbot import filters
import random


class BestMatch(LogicAdapter):
Expand Down Expand Up @@ -36,6 +37,14 @@ def process(self, input_statement, additional_response_selection_parameters=None
if result.confidence >= self.maximum_similarity_threshold:
break

# If closest_match and the next result have equal cofidence, then choose either randomly.
if result.confidence == closest_match.confidence:
closest_match = random.choice([result, closest_match])

# If our new result is better than our previous closest_match, choose closest_match instead.
elif result.confidence > closest_match.confidence:
closest_match = result

self.chatbot.logger.info('Using "{}" as a close match to "{}" with a confidence of {}'.format(
closest_match.text, input_statement.text, closest_match.confidence
))
Expand Down