def get_match_score(self, service_matching_props):
s = service_matching_props
service = get_service_key(service_matching_props)
unit = s['gps_car_id']
corrected_error = env.get_corrected_error(s['mean_time_error'])
close_match = s['total_matching'] > 8 and \
abs(corrected_error) < 1.0 and \
s['variance_time_error'] < 2.0
# intentionally coerces to int to form buckets
total_matching_score = int(s['total_matching'] / 5)
error_score = int(abs(corrected_error) / 0.4)
matched_over_total = float(s['total_matching']) / self.tracker.get_total_for_service(service)
matched_over_total_score = int(matched_over_total / 0.25) # 4 buckets essentially
meets_low = s['variance_time_error'] < 3.0 or \
(s['variance_time_error'] < 5.0 and s['total_matching'] < 6)
return (
-int(close_match), # descending
-int(total_matching_score), # descending
int(error_score), # ascending
-int(matched_over_total_score), # descending
-int(meets_low) # descending
)
def match_trust(self, trust):
tiploc = trust['tiploc']
time = trust['event_time']
service = get_service_key(trust)
self.tracker.seen_service(service)
self.trust_cache.add(tiploc, time, trust)
close_gps_reports = self.gps_cache.get_within(
tiploc, time, env.within_minutes)
for gps in close_gps_reports:
self.queue.add(trust, gps)
def is_likely_match(self, service_matching_props):
s = service_matching_props
service = get_service_key(s)
unit = s['gps_car_id']
if self.allocations.was_planned(service, unit):
return True
interval = s['end'] - s['start']
corrected_error = env.get_corrected_error(s['mean_time_error'])
matched_over_total = float(s['total_matching']) / self.tracker.get_total_for_service(service)
low_error_if_few_reports = s['total_matching'] > 5 or (s['variance_time_error'] < 2.0 and abs(corrected_error) < 1.0)
insignificant = matched_over_total < 0.35 and interval < timedelta(minutes=15)
return s['total_matching'] > 2 and \
s['variance_time_error'] < 6.0 and \
abs(corrected_error) < 1.5 and \
low_error_if_few_reports and \
not insignificant
def from_service_matching(service_matching):
matching = service_matching.as_dict()
service = get_service_key(matching)
gps_car_id = matching['gps_car_id']
trust_reports = get_trust_reports(service, start=matching['start'], end=matching['end'])
gps_reports = get_gps_reports(gps_car_id, start=matching['start'], end=matching['end'])
return get_segment_template(
headcode=matching['headcode'],
origin_location=matching['origin_location'],
origin_departure=matching['origin_departure'],
gps_car_id=gps_car_id,
trust=trust_reports,
gps=gps_reports,
start=matching['start'],
end=matching['end'],
total_matching=matching['total_matching'],
mean_time_error=matching['mean_time_error'],
variance_time_error=matching['variance_time_error'])
def add(self, trust, gps):
service = get_service_key(trust)
unit = gps['gps_car_id']
key = service + (unit,)
event_matching = self.__get_event_matching_props(trust, gps)
self.event_matchings[key].append(event_matching)