1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 | #!/usr/bin/python2.5 # Copyright (C) 2007 Google Inc. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import warnings from gtfsobjectbase import GtfsObjectBase import problems as problems_module import util class Trip(GtfsObjectBase): _REQUIRED_FIELD_NAMES = ['route_id', 'service_id', 'trip_id'] _FIELD_NAMES = _REQUIRED_FIELD_NAMES + [ 'trip_headsign', 'direction_id', 'block_id', 'shape_id' ] _TABLE_NAME= "trips" def __init__(self, headsign=None, service_period=None, route=None, trip_id=None, field_dict=None): self._schedule = None self._headways = [] # [(start_time, end_time, headway_secs)] if not field_dict: field_dict = {} if headsign is not None: field_dict['trip_headsign'] = headsign if route: field_dict['route_id'] = route.route_id if trip_id is not None: field_dict['trip_id'] = trip_id if service_period is not None: field_dict['service_id'] = service_period.service_id # Earlier versions of transitfeed.py assigned self.service_period here # and allowed the caller to set self.service_id. Schedule.Validate # checked the service_id attribute if it was assigned and changed it to a # service_period attribute. Now only the service_id attribute is used and # it is validated by Trip.Validate. if service_period is not None: # For backwards compatibility self.service_id = service_period.service_id self.__dict__.update(field_dict) def GetFieldValuesTuple(self): return [getattr(self, fn) or '' for fn in self._FIELD_NAMES] def AddStopTime(self, stop, problems=None, schedule=None, **kwargs): """Add a stop to this trip. Stops must be added in the order visited. Args: stop: A Stop object kwargs: remaining keyword args passed to StopTime.__init__ Returns: None """ if problems is None: # TODO: delete this branch when StopTime.__init__ doesn't need a # ProblemReporter problems = problems_module.default_problem_reporter stoptime = self.GetGtfsFactory().StopTime( problems=problems, stop=stop, **kwargs) self.AddStopTimeObject(stoptime, schedule) def _AddStopTimeObjectUnordered(self, stoptime, schedule): """Add StopTime object to this trip. The trip isn't checked for duplicate sequence numbers so it must be validated later.""" stop_time_class = self.GetGtfsFactory().StopTime cursor = schedule._connection.cursor() insert_query = "INSERT INTO stop_times (%s) VALUES (%s);" % ( ','.join(stop_time_class._SQL_FIELD_NAMES), ','.join(['?'] * len(stop_time_class._SQL_FIELD_NAMES))) cursor = schedule._connection.cursor() cursor.execute( insert_query, stoptime.GetSqlValuesTuple(self.trip_id)) def ReplaceStopTimeObject(self, stoptime, schedule=None): """Replace a StopTime object from this trip with the given one. Keys the StopTime object to be replaced by trip_id, stop_sequence and stop_id as 'stoptime', with the object 'stoptime'. """ if schedule is None: schedule = self._schedule new_secs = stoptime.GetTimeSecs() cursor = schedule._connection.cursor() cursor.execute("DELETE FROM stop_times WHERE trip_id=? and " "stop_sequence=? and stop_id=?", (self.trip_id, stoptime.stop_sequence, stoptime.stop_id)) if cursor.rowcount == 0: raise problems_module.Error, 'Attempted replacement of StopTime object which does not exist' self._AddStopTimeObjectUnordered(stoptime, schedule) def AddStopTimeObject(self, stoptime, schedule=None, problems=None): """Add a StopTime object to the end of this trip. Args: stoptime: A StopTime object. Should not be reused in multiple trips. schedule: Schedule object containing this trip which must be passed to Trip.__init__ or here problems: ProblemReporter object for validating the StopTime in its new home Returns: None """ if schedule is None: schedule = self._schedule if schedule is None: warnings.warn("No longer supported. _schedule attribute is used to get " "stop_times table", DeprecationWarning) if problems is None: problems = schedule.problem_reporter new_secs = stoptime.GetTimeSecs() cursor = schedule._connection.cursor() cursor.execute("SELECT max(stop_sequence), max(arrival_secs), " "max(departure_secs) FROM stop_times WHERE trip_id=?", (self.trip_id,)) row = cursor.fetchone() if row[0] is None: # This is the first stop_time of the trip stoptime.stop_sequence = 1 if new_secs == None: problems.OtherProblem( 'No time for first StopTime of trip_id "%s"' % (self.trip_id,)) else: stoptime.stop_sequence = row[0] + 1 prev_secs = max(row[1], row[2]) if new_secs != None and new_secs < prev_secs: problems.OtherProblem( 'out of order stop time for stop_id=%s trip_id=%s %s < %s' % (util.EncodeUnicode(stoptime.stop_id), util.EncodeUnicode(self.trip_id), util.FormatSecondsSinceMidnight(new_secs), util.FormatSecondsSinceMidnight(prev_secs))) self._AddStopTimeObjectUnordered(stoptime, schedule) def GetTimeStops(self): """Return a list of (arrival_secs, departure_secs, stop) tuples. Caution: arrival_secs and departure_secs may be 0, a false value meaning a stop at midnight or None, a false value meaning the stop is untimed.""" return [(st.arrival_secs, st.departure_secs, st.stop) for st in self.GetStopTimes()] def GetCountStopTimes(self): """Return the number of stops made by this trip.""" cursor = self._schedule._connection.cursor() cursor.execute( 'SELECT count(*) FROM stop_times WHERE trip_id=?', (self.trip_id,)) return cursor.fetchone()[0] def GetTimeInterpolatedStops(self): """Return a list of (secs, stoptime, is_timepoint) tuples. secs will always be an int. If the StopTime object does not have explict times this method guesses using distance. stoptime is a StopTime object and is_timepoint is a bool. Raises: ValueError if this trip does not have the times needed to interpolate """ rv = [] stoptimes = self.GetStopTimes() # If there are no stoptimes [] is the correct return value but if the start # or end are missing times there is no correct return value. if not stoptimes: return [] if (stoptimes[0].GetTimeSecs() is None or stoptimes[-1].GetTimeSecs() is None): raise ValueError("%s must have time at first and last stop" % (self)) cur_timepoint = None next_timepoint = None distance_between_timepoints = 0 distance_traveled_between_timepoints = 0 for i, st in enumerate(stoptimes): if st.GetTimeSecs() != None: cur_timepoint = st distance_between_timepoints = 0 distance_traveled_between_timepoints = 0 if i + 1 < len(stoptimes): k = i + 1 distance_between_timepoints += util.ApproximateDistanceBetweenStops(stoptimes[k-1].stop, stoptimes[k].stop) while stoptimes[k].GetTimeSecs() == None: k += 1 distance_between_timepoints += util.ApproximateDistanceBetweenStops(stoptimes[k-1].stop, stoptimes[k].stop) next_timepoint = stoptimes[k] rv.append( (st.GetTimeSecs(), st, True) ) else: distance_traveled_between_timepoints += util.ApproximateDistanceBetweenStops(stoptimes[i-1].stop, st.stop) distance_percent = distance_traveled_between_timepoints / distance_between_timepoints total_time = next_timepoint.GetTimeSecs() - cur_timepoint.GetTimeSecs() time_estimate = distance_percent * total_time + cur_timepoint.GetTimeSecs() rv.append( (int(round(time_estimate)), st, False) ) return rv def ClearStopTimes(self): """Remove all stop times from this trip. StopTime objects previously returned by GetStopTimes are unchanged but are no longer associated with this trip. """ cursor = self._schedule._connection.cursor() cursor.execute('DELETE FROM stop_times WHERE trip_id=?', (self.trip_id,)) def GetStopTimes(self, problems=None): """Return a sorted list of StopTime objects for this trip.""" # In theory problems=None should be safe because data from database has been # validated. See comment in _LoadStopTimes for why this isn't always true. cursor = self._schedule._connection.cursor() cursor.execute( 'SELECT arrival_secs,departure_secs,stop_headsign,pickup_type,' 'drop_off_type,shape_dist_traveled,stop_id,stop_sequence FROM ' 'stop_times WHERE ' 'trip_id=? ORDER BY stop_sequence', (self.trip_id,)) stop_times = [] stoptime_class = self.GetGtfsFactory().StopTime for row in cursor.fetchall(): stop = self._schedule.GetStop(row[6]) stop_times.append(stoptime_class(problems=problems, stop=stop, arrival_secs=row[0], departure_secs=row[1], stop_headsign=row[2], pickup_type=row[3], drop_off_type=row[4], shape_dist_traveled=row[5], stop_sequence=row[7])) return stop_times def GetHeadwayStopTimes(self, problems=None): """Deprecated. Please use GetFrequencyStopTimes instead.""" warnings.warn("No longer supported. The HeadwayPeriod class was renamed to " "Frequency, and all related functions were renamed " "accordingly.", DeprecationWarning) return self.GetFrequencyStopTimes(problems) def GetFrequencyStopTimes(self, problems=None): """Return a list of StopTime objects for each headway-based run. Returns: a list of list of StopTime objects. Each list of StopTime objects represents one run. If this trip doesn't have headways returns an empty list. """ stoptimes_list = [] # list of stoptime lists to be returned stoptime_pattern = self.GetStopTimes() first_secs = stoptime_pattern[0].arrival_secs # first time of the trip stoptime_class = self.GetGtfsFactory().StopTime # for each start time of a headway run for run_secs in self.GetFrequencyStartTimes(): # stop time list for a headway run stoptimes = [] # go through the pattern and generate stoptimes for st in stoptime_pattern: arrival_secs, departure_secs = None, None # default value if the stoptime is not timepoint if st.arrival_secs != None: arrival_secs = st.arrival_secs - first_secs + run_secs if st.departure_secs != None: departure_secs = st.departure_secs - first_secs + run_secs # append stoptime stoptimes.append(stoptime_class(problems=problems, stop=st.stop, arrival_secs=arrival_secs, departure_secs=departure_secs, stop_headsign=st.stop_headsign, pickup_type=st.pickup_type, drop_off_type=st.drop_off_type, shape_dist_traveled= \ st.shape_dist_traveled, stop_sequence=st.stop_sequence)) # add stoptimes to the stoptimes_list stoptimes_list.append ( stoptimes ) return stoptimes_list def GetStartTime(self, problems=problems_module.default_problem_reporter): """Return the first time of the trip. TODO: For trips defined by frequency return the first time of the first trip.""" cursor = self._schedule._connection.cursor() cursor.execute( 'SELECT arrival_secs,departure_secs FROM stop_times WHERE ' 'trip_id=? ORDER BY stop_sequence LIMIT 1', (self.trip_id,)) print self.trip_id (arrival_secs, departure_secs) = cursor.fetchone() if arrival_secs != None: return arrival_secs elif departure_secs != None: return departure_secs else: problems.InvalidValue('departure_time', '', 'The first stop_time in trip %s is missing ' 'times.' % self.trip_id) def GetHeadwayStartTimes(self): """Deprecated. Please use GetFrequencyStartTimes instead.""" warnings.warn("No longer supported. The HeadwayPeriod class was renamed to " "Frequency, and all related functions were renamed " "accordingly.", DeprecationWarning) return self.GetFrequencyStartTimes() def GetFrequencyStartTimes(self): """Return a list of start time for each headway-based run. Returns: a sorted list of seconds since midnight, the start time of each run. If this trip doesn't have headways returns an empty list.""" start_times = [] # for each headway period of the trip for start_secs, end_secs, headway_secs in self.GetFrequencyTuples(): # reset run secs to the start of the timeframe run_secs = start_secs while run_secs < end_secs: start_times.append(run_secs) # increment current run secs by headway secs run_secs += headway_secs return start_times def GetEndTime(self, problems=problems_module.default_problem_reporter): """Return the last time of the trip. TODO: For trips defined by frequency return the last time of the last trip.""" cursor = self._schedule._connection.cursor() cursor.execute( 'SELECT arrival_secs,departure_secs FROM stop_times WHERE ' 'trip_id=? ORDER BY stop_sequence DESC LIMIT 1', (self.trip_id,)) (arrival_secs, departure_secs) = cursor.fetchone() if departure_secs != None: return departure_secs elif arrival_secs != None: return arrival_secs else: problems.InvalidValue('arrival_time', '', 'The last stop_time in trip %s is missing ' 'times.' % self.trip_id) def _GenerateStopTimesTuples(self): """Generator for rows of the stop_times file""" stoptimes = self.GetStopTimes() for i, st in enumerate(stoptimes): yield st.GetFieldValuesTuple(self.trip_id) def GetStopTimesTuples(self): results = [] for time_tuple in self._GenerateStopTimesTuples(): results.append(time_tuple) return results def GetPattern(self): """Return a tuple of Stop objects, in the order visited""" stoptimes = self.GetStopTimes() return tuple(st.stop for st in stoptimes) def AddHeadwayPeriodObject(self, headway_period, problem_reporter): """Deprecated. Please use AddFrequencyObject instead.""" warnings.warn("No longer supported. The HeadwayPeriod class was renamed to " "Frequency, and all related functions were renamed " "accordingly.", DeprecationWarning) self.AddFrequencyObject(frequency, problem_reporter) def AddFrequencyObject(self, frequency, problem_reporter): """Add a Frequency object to this trip's list of Frequencies.""" if frequency is not None: self.AddFrequency(frequency.StartTime(), frequency.EndTime(), frequency.HeadwaySecs(), problem_reporter) def AddHeadwayPeriod(self, start_time, end_time, headway_secs, problem_reporter=problems_module.default_problem_reporter): """Deprecated. Please use AddFrequency instead.""" warnings.warn("No longer supported. The HeadwayPeriod class was renamed to " "Frequency, and all related functions were renamed " "accordingly.", DeprecationWarning) self.AddFrequency |