plomlompom.com Git - plomrogue2/blob - plomrogue/things.py

   1 from plomrogue.errors import GameError, PlayError
   2 from plomrogue.mapping import YX, FovMap
   3 from plomrogue.misc import quote
   4 import random
   5
   6
   7
   8 class ThingBase:
   9     type_ = '?'
  10     carrying = False
  11
  12     def __init__(self, game, id_=0, position=(YX(0, 0), YX(0, 0))):
  13         self.game = game
  14         if id_ == 0:
  15             self.id_ = self.game.new_thing_id()
  16         else:
  17             self.id_ = id_
  18         self.position = position
  19
  20
  21
  22 class Thing(ThingBase):
  23     blocks_movement = False
  24     blocks_sound = False
  25     blocks_light = False
  26     portable = False
  27     protection = '.'
  28     commandable = False
  29     cookable = False
  30     carried = False
  31     consumable = False
  32
  33     def __init__(self, *args, **kwargs):
  34         super().__init__(*args, **kwargs)
  35
  36     def proceed(self):
  37         pass
  38
  39     @property
  40     def type_(self):
  41         return self.__class__.get_type()
  42
  43     @classmethod
  44     def get_type(cls):
  45         return cls.__name__[len('Thing_'):]
  46
  47     def sound(self, name, msg):
  48         from plomrogue.mapping import DijkstraMap
  49         import re
  50
  51         def lower_msg_by_volume(msg, volume, largest_audible_distance,
  52                                 url_limits = []):
  53             factor = largest_audible_distance / 4
  54             lowered_msg = ''
  55             in_url = False
  56             i = 0
  57             for c in msg:
  58                 c = c
  59                 if i in url_limits:
  60                     in_url = False if in_url else True
  61                 if not in_url:
  62                     while random.random() > volume * factor:
  63                         if c.isupper():
  64                             c = c.lower()
  65                         elif c != '.' and c != ' ':
  66                             c = '.'
  67                         else:
  68                             c = ' '
  69                 lowered_msg += c
  70                 i += 1
  71             return lowered_msg
  72
  73         largest_audible_distance = 20
  74         obstacles = [t.position for t in self.game.things if t.blocks_sound]
  75         targets = [t.position for t in self.game.things if t.type_ == 'Player']
  76         sound_blockers = self.game.get_sound_blockers()
  77         dijkstra_map = DijkstraMap(targets, sound_blockers, obstacles,
  78                                    self.game.maps, self.position,
  79                                    largest_audible_distance, self.game.get_map)
  80         url_limits = []
  81         for m in re.finditer('https?://[^\s]+', msg):
  82             url_limits += [m.start(), m.end()]
  83         for c_id in self.game.sessions:
  84             listener = self.game.get_player(c_id)
  85             target_yx = dijkstra_map.target_yx(*listener.position, True)
  86             if not target_yx:
  87                 continue
  88             listener_distance = dijkstra_map[target_yx]
  89             if listener_distance > largest_audible_distance:
  90                 continue
  91             volume = 1 / max(1, listener_distance)
  92             lowered_msg = lower_msg_by_volume(msg, volume,
  93                                               largest_audible_distance,
  94                                               url_limits)
  95             lowered_nick = lower_msg_by_volume(name, volume,
  96                                                largest_audible_distance)
  97             symbol = ''
  98             # if listener.fov_test(self.position[0], self.position[1]):
  99             # TODO: We might want to only show chat faces of players that are
 100             # in the listener's FOV.  However, if we do a fov_test here,
 101             # this might set up a listener._fov where previously there was None,
 102             # with ._fov = None serving to Game.send_gamestate() as an indicator
 103             # that map view data for listener might be subject to change and
 104             # therefore needs to be re-sent.  If we generate an un-set ._fov
 105             # here, this inhibits send_gamestate() from sending new map view
 106             # data to listener.  We need to re-structure this whole process
 107             # if we want to use a FOV test on listener here.
 108             if listener_distance < largest_audible_distance / 2:
 109                 self.game.io.send('CHATFACE %s' % self.id_, c_id)
 110                 if self.type_ == 'Player' and hasattr(self, 'thing_char'):
 111                     symbol = '/@' + self.thing_char
 112             self.game.io.send('CHAT ' +
 113                               quote('vol:%.f%s %s%s: %s' % (volume * 100, '%',
 114                                                             lowered_nick, symbol,
 115                                                             lowered_msg)),
 116                               c_id)
 117
 118
 119
 120 class Thing_Item(Thing):
 121     symbol_hint = 'i'
 122     portable = True
 123
 124
 125
 126 class ThingSpawner(Thing):
 127     symbol_hint = 'S'
 128
 129     def proceed(self):
 130         for t in [t for t in self.game.things
 131                   if t != self and t.position == self.position]:
 132             return None
 133         return self.game.add_thing(self.child_type, self.position)
 134
 135
 136
 137 class Thing_ItemSpawner(ThingSpawner):
 138     child_type = 'Item'
 139
 140
 141
 142 class Thing_SpawnPointSpawner(ThingSpawner):
 143     child_type = 'SpawnPoint'
 144
 145
 146
 147 class Thing_SpawnPoint(Thing):
 148     symbol_hint = 's'
 149     portable = True
 150     name = 'username'
 151     temporary = False
 152
 153     def __init__(self, *args, **kwargs):
 154         super().__init__(*args, **kwargs)
 155         self.created_at = datetime.datetime.now()
 156
 157     def proceed(self):
 158         super().proceed()
 159         if self.temporary and datetime.datetime.now() >\
 160            self.created_at + datetime.timedelta(minutes=10):
 161             self.game.remove_thing(self)
 162
 163
 164
 165 class ThingInstallable(Thing):
 166     portable = True
 167     installable = True
 168
 169     def install(self):
 170         self.portable = False
 171
 172     def uninstall(self):
 173         self.portable = True
 174
 175
 176
 177 class Thing_DoorSpawner(ThingSpawner):
 178     child_type = 'Door'
 179
 180     def proceed(self):
 181         door = super().proceed()
 182         if door:
 183             key = self.game.add_thing('DoorKey', self.position)
 184             key.door = door
 185
 186
 187
 188 class Thing_DoorKey(Thing):
 189     portable = True
 190     symbol_hint = 'k'
 191
 192
 193
 194
 195 class Thing_Door(ThingInstallable):
 196     symbol_hint = 'D'
 197     blocks_movement = False
 198     locked = False
 199
 200     def open(self):
 201         self.blocks_movement = False
 202         self.blocks_light = False
 203         self.blocks_sound = False
 204         self.locked = False
 205         del self.thing_char
 206
 207     def close(self):
 208         self.blocks_movement = True
 209         self.blocks_light = True
 210         self.blocks_sound = True
 211         self.thing_char = '#'
 212
 213     def lock(self):
 214         self.locked = True
 215         self.thing_char = 'L'
 216
 217
 218
 219 class Thing_Psychedelic(Thing):
 220     symbol_hint = 'P'
 221     portable = True
 222     cookable = True
 223     consumable = True
 224
 225
 226
 227 class Thing_PsychedelicSpawner(ThingSpawner):
 228     symbol_hint = 'P'
 229     child_type = 'Psychedelic'
 230
 231
 232
 233 class Thing_Bottle(Thing):
 234     symbol_hint = 'B'
 235     portable = True
 236     full = True
 237     thing_char = '~'
 238     spinnable = True
 239     cookable = True
 240     consumable = True
 241
 242     def empty(self):
 243         self.thing_char = '_'
 244         self.full = False
 245
 246     def spin(self):
 247         all_players = [t for t in self.game.things if t.type_ == 'Player']
 248         # TODO: refactor with ThingPlayer.prepare_multiprocessible_fov_stencil
 249         # and ThingPlayer.fov_test
 250         fov_radius = 12
 251         light_blockers = self.game.get_light_blockers()
 252         obstacles = [t.position for t in self.game.things if t.blocks_light]
 253         fov = FovMap(light_blockers, obstacles, self.game.maps,
 254                      self.position, fov_radius, self.game.get_map)
 255         fov.init_terrain()
 256         visible_players = []
 257         for p in all_players:
 258             test_position = fov.target_yx(p.position[0], p.position[1])
 259             if fov.inside(test_position) and fov[test_position] == '.':
 260                 visible_players += [p]
 261         if len(visible_players) == 0:
 262             self.sound('BOTTLE', 'no visible players in spin range')
 263         pick = random.choice(visible_players)
 264         self.sound('BOTTLE', 'BOTTLE picks: ' + pick.name)
 265
 266
 267
 268 class Thing_BottleSpawner(ThingSpawner):
 269     child_type = 'Bottle'
 270
 271
 272
 273 class Thing_Hat(Thing):
 274     symbol_hint = 'H'
 275     portable = True
 276     design = ' +--+ ' + ' |  | ' + '======'
 277     spinnable = True
 278     cookable = True
 279
 280     def spin(self):
 281         new_design = ''
 282         new_design += self.design[12]
 283         new_design += self.design[13]
 284         new_design += self.design[6]
 285         new_design += self.design[7]
 286         new_design += self.design[0]
 287         new_design += self.design[1]
 288         new_design += self.design[14]
 289         new_design += self.design[15]
 290         new_design += self.design[8]
 291         new_design += self.design[9]
 292         new_design += self.design[2]
 293         new_design += self.design[3]
 294         new_design += self.design[16]
 295         new_design += self.design[17]
 296         new_design += self.design[10]
 297         new_design += self.design[11]
 298         new_design += self.design[4]
 299         new_design += self.design[5]
 300         self.design = ''.join(new_design)
 301
 302
 303
 304 class Thing_HatRemixer(Thing):
 305     symbol_hint = 'H'
 306
 307     def accept(self, hat):
 308         import string
 309         new_design = ''
 310         legal_chars = string.ascii_letters + string.digits + string.punctuation + ' '
 311         for i in range(18):
 312             new_design += random.choice(list(legal_chars))
 313         hat.design = new_design
 314         self.sound('HAT REMIXER', 'remixing a hat …')
 315         self.game.changed = True
 316         self.game.record_change(self.position, 'other')
 317
 318
 319
 320 import datetime
 321 class Thing_MusicPlayer(Thing):
 322     symbol_hint = 'R'
 323     commandable = True
 324     portable = True
 325     repeat = True
 326     next_song_start = datetime.datetime.now()
 327     playlist_index = -1
 328     playing = True
 329     cookable = True
 330
 331     def __init__(self, *args, **kwargs):
 332         super().__init__(*args, **kwargs)
 333         self.next_song_start = datetime.datetime.now()
 334         self.playlist = []
 335
 336     def proceed(self):
 337         if (not self.playing) or len(self.playlist) == 0:
 338             return
 339         if datetime.datetime.now() > self.next_song_start:
 340             self.playlist_index += 1
 341             if self.playlist_index == len(self.playlist):
 342                 self.playlist_index = 0
 343                 if not self.repeat:
 344                     self.playing = False
 345                     return
 346             song_data = self.playlist[self.playlist_index]
 347             self.next_song_start = datetime.datetime.now() +\
 348                 datetime.timedelta(seconds=song_data[1])
 349             self.sound('MUSICPLAYER', song_data[0])
 350             self.game.changed = True
 351
 352     def interpret(self, command):
 353         msg_lines = []
 354         if command == 'HELP':
 355             msg_lines += ['available commands:']
 356             msg_lines += ['HELP – show this help']
 357             msg_lines += ['ON/OFF – toggle playback on/off']
 358             msg_lines += ['REWIND – return to start of playlist']
 359             msg_lines += ['LIST – list programmed songs, durations']
 360             msg_lines += ['SKIP – to skip to next song']
 361             msg_lines += ['REPEAT – toggle playlist repeat on/off']
 362             msg_lines += ['ADD LENGTH SONG – add SONG to playlist, with LENGTH in format "minutes:seconds", i.e. something like "0:47" or "11:02"']
 363             return msg_lines
 364         elif command == 'LIST':
 365             msg_lines += ['playlist:']
 366             i = 0
 367             for entry in self.playlist:
 368                 minutes = entry[1] // 60
 369                 seconds = entry[1] % 60
 370                 if seconds < 10:
 371                     seconds = '0%s' % seconds
 372                 selector = 'next:' if i == self.playlist_index else '     '
 373                 msg_lines += ['%s %s:%s – %s' % (selector, minutes, seconds, entry[0])]
 374                 i += 1
 375             return msg_lines
 376         elif command == 'ON/OFF':
 377             self.playing = False if self.playing else True
 378             self.game.changed = True
 379             if self.playing:
 380                 return ['playing']
 381             else:
 382                 return ['paused']
 383         elif command == 'REMOVE':
 384             if len(self.playlist) == 0:
 385                 return ['playlist already empty']
 386             del self.playlist[max(0, self.playlist_index)]
 387             self.playlist_index -= 1
 388             if self.playlist_index < -1:
 389                 self.playlist_index = -1
 390             self.game.changed = True
 391             return ['removed song']
 392         elif command == 'REWIND':
 393             self.playlist_index = -1
 394             self.next_song_start = datetime.datetime.now()
 395             self.game.changed = True
 396             return ['back at start of playlist']
 397         elif command == 'SKIP':
 398             self.next_song_start = datetime.datetime.now()
 399             self.game.changed = True
 400             return ['skipped']
 401         elif command == 'REPEAT':
 402             self.repeat = False if self.repeat else True
 403             self.game.changed = True
 404             if self.repeat:
 405                 return ['playlist repeat turned on']
 406             else:
 407                 return ['playlist repeat turned off']
 408         elif command.startswith('ADD '):
 409             tokens = command.split(' ', 2)
 410             if len(tokens) != 3:
 411                 return ['wrong syntax, see HELP']
 412             length = tokens[1].split(':')
 413             if len(length) != 2:
 414                 return ['wrong syntax, see HELP']
 415             try:
 416                 minutes = int(length[0])
 417                 seconds = int(length[1])
 418             except ValueError:
 419                 return ['wrong syntax, see HELP']
 420             self.playlist += [(tokens[2], minutes * 60 + seconds)]
 421             self.game.changed = True
 422             return ['added']
 423         else:
 424             return ['cannot understand command']
 425
 426
 427
 428 class Thing_BottleDeposit(Thing):
 429     bottle_counter = 0
 430     symbol_hint = 'O'
 431
 432     def proceed(self):
 433         if self.bottle_counter >= 3:
 434             self.bottle_counter = 0
 435             choice = random.choice(['MusicPlayer', 'Hat'])
 436             self.game.add_thing(choice, self.position)
 437             msg = 'here is a gift as a reward for ecological consciousness –'
 438             if choice == 'MusicPlayer':
 439                 msg += 'pick it up and then use "command thing" on it!'
 440             elif choice == 'Hat':
 441                 msg += 'pick it up and then use "(un-)wear" on it!'
 442             self.sound('BOTTLE DEPOSITOR', msg)
 443
 444     def accept(self):
 445         self.bottle_counter += 1
 446         self.sound('BOTTLE DEPOSITOR',
 447                    'thanks for this empty bottle – deposit %s more for a gift!' %
 448                    (3 - self.bottle_counter))
 449
 450
 451
 452 class Thing_Stimulant(Thing):
 453     symbol_hint = 'e'
 454     cookable = True
 455     portable = True
 456     consumable = True
 457
 458
 459
 460 class Thing_StimulantSpawner(ThingSpawner):
 461     symbol_hint = 'e'
 462     child_type = 'Stimulant'
 463
 464
 465
 466 class Thing_Cookie(Thing):
 467     symbol_hint = 'c'
 468     portable = True
 469     consumable = True
 470
 471     def __init__(self, *args, **kwargs):
 472         import string
 473         super().__init__(*args, **kwargs)
 474         legal_chars = string.ascii_letters + string.digits + string.punctuation + ' '
 475         self.thing_char = random.choice(list(legal_chars))
 476
 477
 478
 479 class Thing_CookieSpawner(Thing):
 480     symbol_hint = 'O'
 481
 482     def accept(self, thing):
 483         self.sound('OVEN', '*heat* *brrzt* here\'s a cookie!')
 484         self.game.add_thing('Cookie', self.position)
 485
 486
 487
 488 class Thing_Crate(Thing):
 489     portable = True
 490     symbol_hint = 'C'
 491
 492     def __init__(self, *args, **kwargs):
 493         super().__init__(*args, **kwargs)
 494         self.content = []
 495
 496     def accept(self, thing):
 497         self.content += [thing]
 498
 499     def remove_from_crate(self, thing):
 500         self.content.remove(thing)
 501
 502
 503
 504 class Thing_CrateSpawner(ThingSpawner):
 505     child_type = 'Crate'
 506     symbol_hint = 'C'
 507
 508
 509
 510 class ThingAnimate(Thing):
 511     energy = 50
 512
 513     def __init__(self, *args, **kwargs):
 514         super().__init__(*args, **kwargs)
 515         self.next_task = [None]
 516         self.task = None
 517         self.invalidate('fov')
 518         self.invalidate('other')  # currently redundant though
 519
 520     def invalidate(self, type_):
 521         if type_ == 'fov':
 522             self._fov = None
 523             self._visible_terrain = None
 524             self._visible_control = None
 525             self.invalidate('other')
 526         elif type_ == 'other':
 527             self._seen_things = None
 528             self._seen_annotation_positions = None
 529             self._seen_portal_positions = None
 530
 531     def set_next_task(self, task_name, args=()):
 532         task_class = self.game.tasks[task_name]
 533         self.next_task = [task_class(self, args)]
 534
 535     def get_next_task(self):
 536         if self.next_task[0]:
 537             task = self.next_task[0]
 538             self.next_task = [None]
 539             task.check()
 540             task.todo += max(0, -self.energy * 10)
 541             return task
 542
 543     def proceed(self):
 544         if self.task is None:
 545             self.task = self.get_next_task()
 546             return
 547         try:
 548             self.task.check()
 549         except (PlayError, GameError) as e:
 550             self.task = None
 551             raise e
 552         self.task.todo -= 1
 553         if self.task.todo <= 0:
 554             self.task.do()
 555             self.game.changed = True
 556             self.task = self.get_next_task()
 557
 558     def prepare_multiprocessible_fov_stencil(self):
 559         fov_radius = 3 if self.drunk > 0 else 12
 560         light_blockers = self.game.get_light_blockers()
 561         obstacles = [t.position for t in self.game.things if t.blocks_light]
 562         self._fov = FovMap(light_blockers, obstacles, self.game.maps,
 563                            self.position, fov_radius, self.game.get_map)
 564
 565     def multiprocessible_fov_stencil(self):
 566         self._fov.init_terrain()
 567
 568     @property
 569     def fov_stencil(self):
 570         if self._fov:
 571             return self._fov
 572         # due to the pre-multiprocessing in game.send_gamestate,
 573         # the following should actually never be called
 574         self.prepare_multiprocessible_fov_stencil()
 575         self.multiprocessible_fov_stencil()
 576         return self._fov
 577
 578     def fov_test(self, big_yx, little_yx):
 579         test_position = self.fov_stencil.target_yx(big_yx, little_yx)
 580         if self.fov_stencil.inside(test_position):
 581             if self.fov_stencil[test_position] == '.':
 582                 return True
 583         return False
 584
 585     def fov_stencil_map(self, map_type):
 586         visible_terrain = ''
 587         for yx in self.fov_stencil:
 588             if self.fov_stencil[yx] == '.':
 589                 big_yx, little_yx = self.fov_stencil.source_yxyx(yx)
 590                 map_ = self.game.get_map(big_yx, map_type)
 591                 visible_terrain += map_[little_yx]
 592             else:
 593                 visible_terrain += ' '
 594         return visible_terrain
 595
 596     @property
 597     def visible_terrain(self):
 598         if self._visible_terrain:
 599             return self._visible_terrain
 600         self._visible_terrain = self.fov_stencil_map('normal')
 601         return self._visible_terrain
 602
 603     @property
 604     def visible_control(self):
 605         if self._visible_control:
 606             return self._visible_control
 607         self._visible_control = self.fov_stencil_map('control')
 608         return self._visible_control
 609
 610     @property
 611     def seen_things(self):
 612         if self._seen_things is not None:
 613             return self._seen_things
 614         self._seen_things = [t for t in self.game.things
 615                              if self.fov_test(*t.position)]
 616         return self._seen_things
 617
 618     @property
 619     def seen_annotation_positions(self):
 620         if self._seen_annotation_positions is not None:
 621             return self._seen_annotation_positions
 622         self._seen_annotation_positions = []
 623         for big_yx in self.game.annotations:
 624             for little_yx in [little_yx for little_yx
 625                               in self.game.annotations[big_yx]
 626                               if self.fov_test(big_yx, little_yx)]:
 627                 self._seen_annotation_positions += [(big_yx, little_yx)]
 628         return self._seen_annotation_positions
 629
 630     @property
 631     def seen_portal_positions(self):
 632         if self._seen_portal_positions is not None:
 633             return self._seen_portal_positions
 634         self._seen_portal_positions = []
 635         for big_yx in self.game.portals:
 636             for little_yx in [little_yx for little_yx
 637                               in self.game.portals[big_yx]
 638                               if self.fov_test(big_yx, little_yx)]:
 639                 self._seen_portal_positions += [(big_yx, little_yx)]
 640         return self._seen_portal_positions
 641
 642
 643
 644 class Thing_Player(ThingAnimate):
 645     symbol_hint = '@'
 646     drunk = 0
 647     tripping = 0
 648     need_for_toilet = 0
 649     standing = True
 650     dancing = 0
 651
 652     def __init__(self, *args, **kwargs):
 653         super().__init__(*args, **kwargs)
 654         self.carrying = None
 655
 656     def proceed(self):
 657         super().proceed()
 658         if self.drunk >= 0:
 659             self.drunk -= 1
 660         if self.tripping >= 0:
 661             self.tripping -= 1
 662         if self.need_for_toilet > 0:
 663             terrain = self.game.maps[self.position[0]][self.position[1]]
 664             if terrain in self.game.terrains:
 665                 terrain_type = self.game.terrains[terrain]
 666                 if 'toilet' in terrain_type.tags:
 667                     self.send_msg('CHAT "You use the toilet. What a relief!"')
 668                     self.need_for_toilet = 0
 669         if self.need_for_toilet > 0:
 670             if random.random() > 0.9999:
 671                 self.need_for_toilet += 1
 672                 self.game.changed = True
 673             if 100000 * random.random() < self.need_for_toilet:
 674                 self.send_msg('CHAT "You need to go to a toilet."')
 675             if self.need_for_toilet > 100:
 676                 self.send_msg('CHAT "You pee into your pants. Eww!"')
 677                 self.need_for_toilet = 0
 678                 self.game.changed = True
 679         if self.drunk == 0:
 680             self.send_msg('CHAT "You sober up."')
 681             self.invalidate('fov')
 682             self.game.changed = True
 683         if self.tripping == 0:
 684             self.send_msg('DEFAULT_COLORS')
 685             self.send_msg('CHAT "You sober up."')
 686             self.game.changed = True
 687         elif self.tripping > 0 and self.tripping % 250 == 0:
 688             self.send_msg('RANDOM_COLORS')
 689             self.game.changed = True
 690         if random.random() > 0.9999:
 691             if self.standing:
 692                 self.energy -= 1
 693             else:
 694                 self.energy += 1
 695             if self.energy < 0 and self.standing and self.energy % 5 == 0:
 696                     self.send_msg('CHAT "All that walking or standing uses up '
 697                                   'your energy, which makes you slower.  Find a'
 698                                   ' place to sit or lie down to regain it."')
 699             self.game.changed = True
 700         if self.dancing and random.random() > 0.99 and not self.next_task[0]:
 701             self.dancing -= 1
 702             direction = random.choice(self.game.map_geometry.directions)
 703             self.set_next_task('MOVE', [direction])
 704             if random.random() > 0.9:
 705                 self.energy -= 1
 706                 self.game.changed = True
 707         if 1000000 * random.random() < self.energy - 50:
 708             self.send_msg('CHAT "Your body tries to '
 709                           'dance off its energy surplus."')
 710             self.dancing += 50
 711             self.game.changed = True
 712
 713     def send_msg(self, msg):
 714         for c_id in self.game.sessions:
 715             if self.game.sessions[c_id]['thing_id'] == self.id_:
 716                 self.game.io.send(msg, c_id)
 717                 break
 718
 719     def uncarry(self):
 720         t = self.carrying
 721         t.carried = False
 722         self.carrying = None
 723         return t
 724
 725     def add_cookie_char(self, c):
 726         if not self.name in self.game.players_hat_chars:
 727             self.game.players_hat_chars[self.name] = ' #'  # default
 728         if not c in self.game.players_hat_chars[self.name]:
 729             self.game.players_hat_chars[self.name] += c
 730
 731     def get_cookie_chars(self):
 732         chars = ' #'  # default
 733         if self.name in self.game.players_hat_chars:
 734             chars = self.game.players_hat_chars[self.name]
 735         chars_split = list(chars)
 736         chars_split.sort()
 737         return ''.join(chars_split)