| 1 | # To change this template, choose Tools | Templates |
|---|
| 2 | # and open the template in the editor. |
|---|
| 3 | |
|---|
| 4 | import anuga.geometry.polygon |
|---|
| 5 | from anuga.geometry.polygon import inside_polygon, is_inside_polygon, line_intersect |
|---|
| 6 | from anuga.config import velocity_protection, g |
|---|
| 7 | import math |
|---|
| 8 | |
|---|
| 9 | import numpy as num |
|---|
| 10 | from anuga.structures.inlet import Inlet |
|---|
| 11 | import pypar |
|---|
| 12 | |
|---|
| 13 | class Parallel_Inlet(Inlet): |
|---|
| 14 | """Contains information associated with each inlet |
|---|
| 15 | """ |
|---|
| 16 | |
|---|
| 17 | """ |
|---|
| 18 | Parallel inlet: |
|---|
| 19 | |
|---|
| 20 | master_proc - coordinates all processors associated with this inlet |
|---|
| 21 | usually the processors with domains which contains parts of this inlet. |
|---|
| 22 | |
|---|
| 23 | procs - is the list of all processors associated with this inlet. |
|---|
| 24 | |
|---|
| 25 | (We assume that the above arguments are determined correctly by the parallel_operator_factory) |
|---|
| 26 | """ |
|---|
| 27 | |
|---|
| 28 | def __init__(self, domain, line, master_proc = 0, procs = None, verbose=False): |
|---|
| 29 | |
|---|
| 30 | self.domain = domain |
|---|
| 31 | self.line = line |
|---|
| 32 | self.verbose = verbose |
|---|
| 33 | self.master_proc = master_proc |
|---|
| 34 | |
|---|
| 35 | if procs is None: |
|---|
| 36 | self.procs = [self.master_proc] |
|---|
| 37 | else: |
|---|
| 38 | self.procs = procs |
|---|
| 39 | |
|---|
| 40 | self.myid = pypar.rank() |
|---|
| 41 | |
|---|
| 42 | self.compute_triangle_indices() |
|---|
| 43 | self.compute_area() |
|---|
| 44 | self.compute_inlet_length() |
|---|
| 45 | |
|---|
| 46 | |
|---|
| 47 | |
|---|
| 48 | def compute_triangle_indices(self): |
|---|
| 49 | |
|---|
| 50 | # Get boundary of full triangles (in absolute coordinates) |
|---|
| 51 | vertex_coordinates = self.domain.get_full_vertex_coordinates(absolute=True) |
|---|
| 52 | |
|---|
| 53 | # PETE: we can assume that the ghost triangles in this domain exist in another |
|---|
| 54 | # domain, therefore any part of the inlet corresponding to them are accounted for. |
|---|
| 55 | |
|---|
| 56 | self.triangle_indices = line_intersect(vertex_coordinates, self.line) |
|---|
| 57 | |
|---|
| 58 | for i in self.triangle_indices: |
|---|
| 59 | assert self.domain.tri_full_flag[i] == 1 |
|---|
| 60 | |
|---|
| 61 | def compute_area(self): |
|---|
| 62 | |
|---|
| 63 | # Compute inlet area as the sum of areas of triangles identified |
|---|
| 64 | # by line. Must be called after compute_inlet_triangle_indices(). |
|---|
| 65 | if len(self.triangle_indices) == 0: |
|---|
| 66 | region = 'Inlet line=%s' % (self.line) |
|---|
| 67 | msg = 'No triangles have been identified in region ' |
|---|
| 68 | print "WARNING: " + msg |
|---|
| 69 | |
|---|
| 70 | self.area = 0.0 |
|---|
| 71 | for j in self.triangle_indices: |
|---|
| 72 | self.area += self.domain.areas[j] |
|---|
| 73 | |
|---|
| 74 | msg = 'Inlet exchange area has area = %f' % self.area |
|---|
| 75 | assert self.area >= 0.0 |
|---|
| 76 | |
|---|
| 77 | def compute_inlet_length(self): |
|---|
| 78 | """ Compute the length of the inlet within this domain (as |
|---|
| 79 | defined by the input line |
|---|
| 80 | """ |
|---|
| 81 | |
|---|
| 82 | point0 = self.line[0] |
|---|
| 83 | point1 = self.line[1] |
|---|
| 84 | |
|---|
| 85 | self.inlet_length = anuga.geometry.polygon.line_length(self.line) |
|---|
| 86 | |
|---|
| 87 | |
|---|
| 88 | def get_inlet_length(self): |
|---|
| 89 | # LOCAL |
|---|
| 90 | msg = "Warning: compute_inlet_length not implemented" |
|---|
| 91 | warnings.warn(msg) |
|---|
| 92 | return self.inlet_length |
|---|
| 93 | |
|---|
| 94 | def get_line(self): |
|---|
| 95 | return self.line |
|---|
| 96 | |
|---|
| 97 | def get_area(self): |
|---|
| 98 | # LOCAL |
|---|
| 99 | return self.area |
|---|
| 100 | |
|---|
| 101 | def get_global_area(self): |
|---|
| 102 | # GLOBAL: Master processor gathers area from all child processors, and returns value |
|---|
| 103 | |
|---|
| 104 | # WARNING: requires synchronization, must be called by all procs associated |
|---|
| 105 | # with this inlet |
|---|
| 106 | |
|---|
| 107 | local_area = self.area |
|---|
| 108 | area = local_area |
|---|
| 109 | |
|---|
| 110 | if self.myid == self.master_proc: |
|---|
| 111 | |
|---|
| 112 | for i in self.procs: |
|---|
| 113 | if i == self.master_proc: continue |
|---|
| 114 | |
|---|
| 115 | val = pypar.receive(i) |
|---|
| 116 | area = area + val |
|---|
| 117 | else: |
|---|
| 118 | pypar.send(area, self.master_proc) |
|---|
| 119 | |
|---|
| 120 | return area |
|---|
| 121 | |
|---|
| 122 | |
|---|
| 123 | def get_areas(self): |
|---|
| 124 | # Must be called after compute_inlet_triangle_indices(). |
|---|
| 125 | # LOCAL |
|---|
| 126 | |
|---|
| 127 | return self.domain.areas.take(self.triangle_indices) |
|---|
| 128 | |
|---|
| 129 | |
|---|
| 130 | def get_stages(self): |
|---|
| 131 | # LOCAL |
|---|
| 132 | |
|---|
| 133 | return self.domain.quantities['stage'].centroid_values.take(self.triangle_indices) |
|---|
| 134 | |
|---|
| 135 | |
|---|
| 136 | def get_average_stage(self): |
|---|
| 137 | # LOCAL |
|---|
| 138 | |
|---|
| 139 | return num.sum(self.get_stages()*self.get_areas())/self.area |
|---|
| 140 | |
|---|
| 141 | def get_global_average_stage(self): |
|---|
| 142 | # GLOBAL: Master processor gathers stages from all child processors, and returns average |
|---|
| 143 | |
|---|
| 144 | # WARNING: requires synchronization, must be called by all procs associated |
|---|
| 145 | # with this inlet |
|---|
| 146 | |
|---|
| 147 | local_stage = num.sum(self.get_stages()*self.get_areas()) |
|---|
| 148 | global_area = self.get_global_area() |
|---|
| 149 | global_stage = local_stage |
|---|
| 150 | |
|---|
| 151 | if self.myid == self.master_proc: |
|---|
| 152 | for i in self.procs: |
|---|
| 153 | if i == self.master_proc: continue |
|---|
| 154 | |
|---|
| 155 | val = pypar.receive(i) |
|---|
| 156 | global_stage = global_stage + val |
|---|
| 157 | else: |
|---|
| 158 | pypar.send(local_stage, self.master_proc) |
|---|
| 159 | |
|---|
| 160 | |
|---|
| 161 | return global_stage/global_area |
|---|
| 162 | |
|---|
| 163 | def get_elevations(self): |
|---|
| 164 | # LOCAL |
|---|
| 165 | return self.domain.quantities['elevation'].centroid_values.take(self.triangle_indices) |
|---|
| 166 | |
|---|
| 167 | def get_average_elevation(self): |
|---|
| 168 | # LOCAL |
|---|
| 169 | return num.sum(self.get_elevations()*self.get_areas())/self.area |
|---|
| 170 | |
|---|
| 171 | |
|---|
| 172 | def get_xmoms(self): |
|---|
| 173 | # LOCAL |
|---|
| 174 | return self.domain.quantities['xmomentum'].centroid_values.take(self.triangle_indices) |
|---|
| 175 | |
|---|
| 176 | |
|---|
| 177 | def get_average_xmom(self): |
|---|
| 178 | # LOCAL |
|---|
| 179 | return num.sum(self.get_xmoms()*self.get_areas())/self.area |
|---|
| 180 | |
|---|
| 181 | def get_global_average_xmom(self): |
|---|
| 182 | # GLOBAL: master proc gathers all xmom values and returns average |
|---|
| 183 | # WARNING: requires synchronization, must be called by all procs associated |
|---|
| 184 | # with this inlet |
|---|
| 185 | |
|---|
| 186 | global_area = self.get_global_area() |
|---|
| 187 | local_xmoms = num.sum(self.get_xmoms()*self.get_areas()) |
|---|
| 188 | global_xmoms = local_xmoms |
|---|
| 189 | |
|---|
| 190 | if self.myid == self.master_proc: |
|---|
| 191 | for i in self.procs: |
|---|
| 192 | if i == self.master_proc: continue |
|---|
| 193 | |
|---|
| 194 | val = pypar.receive(i) |
|---|
| 195 | global_xmoms = global_xmoms + val |
|---|
| 196 | else: |
|---|
| 197 | pypar.send(local_xmoms, self.master_proc) |
|---|
| 198 | |
|---|
| 199 | |
|---|
| 200 | return global_xmoms/global_area |
|---|
| 201 | |
|---|
| 202 | def get_ymoms(self): |
|---|
| 203 | # LOCAL |
|---|
| 204 | return self.domain.quantities['ymomentum'].centroid_values.take(self.triangle_indices) |
|---|
| 205 | |
|---|
| 206 | |
|---|
| 207 | def get_average_ymom(self): |
|---|
| 208 | # LOCAL |
|---|
| 209 | return num.sum(self.get_ymoms()*self.get_areas())/self.area |
|---|
| 210 | |
|---|
| 211 | def get_global_average_ymom(self): |
|---|
| 212 | # GLOBAL: master proc gathers all ymom values and returns average |
|---|
| 213 | # WARNING: requires synchronization, must be called by all procs associated |
|---|
| 214 | # with this inlet |
|---|
| 215 | |
|---|
| 216 | global_area = self.get_global_area() |
|---|
| 217 | local_ymoms = num.sum(self.get_ymoms()*self.get_areas()) |
|---|
| 218 | global_ymoms = local_ymoms |
|---|
| 219 | |
|---|
| 220 | if self.myid == self.master_proc: |
|---|
| 221 | for i in self.procs: |
|---|
| 222 | if i == self.master_proc: continue |
|---|
| 223 | |
|---|
| 224 | val = pypar.receive(i) |
|---|
| 225 | global_ymoms = global_ymoms + val |
|---|
| 226 | else: |
|---|
| 227 | pypar.send(local_ymoms, self.master_proc) |
|---|
| 228 | |
|---|
| 229 | |
|---|
| 230 | return global_ymoms/global_area |
|---|
| 231 | |
|---|
| 232 | def get_depths(self): |
|---|
| 233 | # LOCAL |
|---|
| 234 | return self.get_stages() - self.get_elevations() |
|---|
| 235 | |
|---|
| 236 | |
|---|
| 237 | def get_total_water_volume(self): |
|---|
| 238 | # LOCAL |
|---|
| 239 | return num.sum(self.get_depths()*self.get_areas()) |
|---|
| 240 | |
|---|
| 241 | def get_global_total_water_volume(self): |
|---|
| 242 | # GLOBAL: master proc gathers total water volumes from each proc and returns average |
|---|
| 243 | # WARNING: requires synchronization, must be called by all procs associated |
|---|
| 244 | # with this inlet |
|---|
| 245 | |
|---|
| 246 | local_volume = num.sum(self.get_depths()*self.get_areas()) |
|---|
| 247 | volume = local_volume |
|---|
| 248 | |
|---|
| 249 | if self.myid == self.master_proc: |
|---|
| 250 | |
|---|
| 251 | for i in self.procs: |
|---|
| 252 | if i == self.master_proc: continue |
|---|
| 253 | |
|---|
| 254 | val = pypar.receive(i) |
|---|
| 255 | volume = volume + val |
|---|
| 256 | else: |
|---|
| 257 | pypar.send(volume, self.master_proc) |
|---|
| 258 | |
|---|
| 259 | return volume |
|---|
| 260 | |
|---|
| 261 | def get_average_depth(self): |
|---|
| 262 | # LOCAL |
|---|
| 263 | return self.get_total_water_volume()/self.area |
|---|
| 264 | |
|---|
| 265 | def get_global_average_depth(self): |
|---|
| 266 | # GLOBAL: master proc gathers all depth values and returns average |
|---|
| 267 | # WARNING: requires synchronization, must be called by all procs associated |
|---|
| 268 | # with this inlet |
|---|
| 269 | |
|---|
| 270 | area = self.get_global_area() |
|---|
| 271 | total_water_volume = self.get_global_total_water_volume() |
|---|
| 272 | |
|---|
| 273 | return total_water_volume / area |
|---|
| 274 | |
|---|
| 275 | |
|---|
| 276 | def get_velocities(self): |
|---|
| 277 | #LOCAL |
|---|
| 278 | depths = self.get_depths() |
|---|
| 279 | u = self.get_xmoms()/(depths + velocity_protection/depths) |
|---|
| 280 | v = self.get_ymoms()/(depths + velocity_protection/depths) |
|---|
| 281 | |
|---|
| 282 | return u, v |
|---|
| 283 | |
|---|
| 284 | |
|---|
| 285 | def get_xvelocities(self): |
|---|
| 286 | #LOCAL |
|---|
| 287 | depths = self.get_depths() |
|---|
| 288 | return self.get_xmoms()/(depths + velocity_protection/depths) |
|---|
| 289 | |
|---|
| 290 | def get_yvelocities(self): |
|---|
| 291 | #LOCAL |
|---|
| 292 | depths = self.get_depths() |
|---|
| 293 | return self.get_ymoms()/(depths + velocity_protection/depths) |
|---|
| 294 | |
|---|
| 295 | |
|---|
| 296 | def get_average_speed(self): |
|---|
| 297 | #LOCAL |
|---|
| 298 | u, v = self.get_velocities() |
|---|
| 299 | |
|---|
| 300 | average_u = num.sum(u*self.get_areas())/self.area |
|---|
| 301 | average_v = num.sum(v*self.get_areas())/self.area |
|---|
| 302 | |
|---|
| 303 | return math.sqrt(average_u**2 + average_v**2) |
|---|
| 304 | |
|---|
| 305 | |
|---|
| 306 | def get_average_velocity_head(self): |
|---|
| 307 | #LOCAL |
|---|
| 308 | return 0.5*self.get_average_speed()**2/g |
|---|
| 309 | |
|---|
| 310 | |
|---|
| 311 | def get_average_total_energy(self): |
|---|
| 312 | #LOCAL |
|---|
| 313 | return self.get_average_velocity_head() + self.get_average_stage() |
|---|
| 314 | |
|---|
| 315 | |
|---|
| 316 | def get_average_specific_energy(self): |
|---|
| 317 | #LOCAL |
|---|
| 318 | return self.get_average_velocity_head() + self.get_average_depth() |
|---|
| 319 | |
|---|
| 320 | |
|---|
| 321 | # Set routines (ALL LOCAL) |
|---|
| 322 | |
|---|
| 323 | def set_depths(self,depth): |
|---|
| 324 | |
|---|
| 325 | self.domain.quantities['stage'].centroid_values.put(self.triangle_indices, self.get_elevations() + depth) |
|---|
| 326 | |
|---|
| 327 | |
|---|
| 328 | def set_stages(self,stage): |
|---|
| 329 | |
|---|
| 330 | self.domain.quantities['stage'].centroid_values.put(self.triangle_indices, stage) |
|---|
| 331 | |
|---|
| 332 | |
|---|
| 333 | def set_xmoms(self,xmom): |
|---|
| 334 | |
|---|
| 335 | self.domain.quantities['xmomentum'].centroid_values.put(self.triangle_indices, xmom) |
|---|
| 336 | |
|---|
| 337 | |
|---|
| 338 | def set_ymoms(self,ymom): |
|---|
| 339 | |
|---|
| 340 | self.domain.quantities['ymomentum'].centroid_values.put(self.triangle_indices, ymom) |
|---|
| 341 | |
|---|
| 342 | |
|---|
| 343 | def set_elevations(self,elevation): |
|---|
| 344 | |
|---|
| 345 | self.domain.quantities['elevation'].centroid_values.put(self.triangle_indices, elevation) |
|---|
| 346 | |
|---|
| 347 | |
|---|
| 348 | def set_stages_evenly(self,volume): |
|---|
| 349 | """ Distribute volume of water over |
|---|
| 350 | inlet exchange region so that stage is level |
|---|
| 351 | """ |
|---|
| 352 | # WARNING: requires synchronization, must be called by all procs associated |
|---|
| 353 | # with this inlet |
|---|
| 354 | |
|---|
| 355 | centroid_coordinates = self.domain.get_full_centroid_coordinates(absolute=True) |
|---|
| 356 | areas = self.get_areas() |
|---|
| 357 | stages = self.get_stages() |
|---|
| 358 | |
|---|
| 359 | stages_order = stages.argsort() |
|---|
| 360 | |
|---|
| 361 | # PETE: send stages and areas, apply merging procedure |
|---|
| 362 | |
|---|
| 363 | s_areas = {} |
|---|
| 364 | s_stages = {} |
|---|
| 365 | s_stages_order = {} |
|---|
| 366 | total_stages = len(stages) |
|---|
| 367 | |
|---|
| 368 | if self.myid == self.master_proc: |
|---|
| 369 | s_areas[self.myid] = areas |
|---|
| 370 | s_stages[self.myid] = stages |
|---|
| 371 | s_stages_order[self.myid] = stages_order |
|---|
| 372 | |
|---|
| 373 | # Recieve areas, stages, and stages order |
|---|
| 374 | for i in self.procs: |
|---|
| 375 | if i != self.master_proc: |
|---|
| 376 | s_areas[i] = pypar.receive(i) |
|---|
| 377 | s_stages[i] = pypar.receive(i) |
|---|
| 378 | s_stages_order[i] = pypar.receive(i) |
|---|
| 379 | total_stages = total_stages + len(s_stages[i]) |
|---|
| 380 | |
|---|
| 381 | else: |
|---|
| 382 | # Send areas, stages, and stages order to master proc of inlet |
|---|
| 383 | pypar.send(areas, self.master_proc) |
|---|
| 384 | pypar.send(stages, self.master_proc) |
|---|
| 385 | pypar.send(stages_order, self.master_proc) |
|---|
| 386 | |
|---|
| 387 | # merge sorted stage order |
|---|
| 388 | if self.myid == self.master_proc: |
|---|
| 389 | pos = {} |
|---|
| 390 | summed_volume = 0. |
|---|
| 391 | summed_areas = 0. |
|---|
| 392 | prev_stage = 0. |
|---|
| 393 | num_stages = 0. |
|---|
| 394 | first = True |
|---|
| 395 | |
|---|
| 396 | for i in self.procs: |
|---|
| 397 | pos[i] = 0 |
|---|
| 398 | |
|---|
| 399 | while num_stages < total_stages: |
|---|
| 400 | # Determine current minimum stage of all the processors in s_stages |
|---|
| 401 | num_stages = num_stages + 1 |
|---|
| 402 | current_stage = num.finfo(num.float32).max |
|---|
| 403 | index = -1 |
|---|
| 404 | |
|---|
| 405 | for i in self.procs: |
|---|
| 406 | if pos[i] >= len(s_stages[i]): |
|---|
| 407 | continue |
|---|
| 408 | |
|---|
| 409 | if s_stages[i][s_stages_order[i][pos[i]]] < current_stage: |
|---|
| 410 | current_stage = s_stages[i][s_stages_order[i][pos[i]]] |
|---|
| 411 | index = i |
|---|
| 412 | |
|---|
| 413 | # If first iteration, then only update summed_areas, position, and prev|current stage |
|---|
| 414 | |
|---|
| 415 | if first: |
|---|
| 416 | first = False |
|---|
| 417 | summed_areas = s_areas[index][s_stages_order[index][pos[index]]] |
|---|
| 418 | pos[index] = pos[index] + 1 |
|---|
| 419 | prev_stage = current_stage |
|---|
| 420 | continue |
|---|
| 421 | |
|---|
| 422 | assert index >= 0, "Index out of bounds" |
|---|
| 423 | |
|---|
| 424 | # Update summed volume and summed areas |
|---|
| 425 | tmp_volume = summed_volume + (summed_areas * (current_stage - prev_stage)) |
|---|
| 426 | |
|---|
| 427 | # Terminate if volume exceeded |
|---|
| 428 | if tmp_volume >= volume: |
|---|
| 429 | break |
|---|
| 430 | |
|---|
| 431 | summed_areas = summed_areas + s_areas[index][s_stages_order[index][pos[index]]] |
|---|
| 432 | pos[index] = pos[index] + 1 |
|---|
| 433 | summed_volume = tmp_volume |
|---|
| 434 | |
|---|
| 435 | # Update position of index processor and current stage |
|---|
| 436 | prev_stage = current_stage |
|---|
| 437 | |
|---|
| 438 | # Calculate new stage |
|---|
| 439 | new_stage = prev_stage + (volume - summed_volume) / summed_areas |
|---|
| 440 | |
|---|
| 441 | # Send postion and new stage to all processors |
|---|
| 442 | for i in self.procs: |
|---|
| 443 | if i != self.master_proc: |
|---|
| 444 | pypar.send(pos[i], i) |
|---|
| 445 | pypar.send(new_stage, i) |
|---|
| 446 | |
|---|
| 447 | # Update own depth |
|---|
| 448 | stages[stages_order[0:pos[self.myid]]] = new_stage |
|---|
| 449 | else: |
|---|
| 450 | pos = pypar.receive(self.master_proc) |
|---|
| 451 | new_stage = pypar.receive(self.master_proc) |
|---|
| 452 | stages[stages_order[0:pos]] = new_stage |
|---|
| 453 | |
|---|
| 454 | self.set_stages(stages) |
|---|
| 455 | |
|---|
| 456 | stages = self.get_stages() |
|---|
| 457 | stages_order = stages.argsort() |
|---|
| 458 | |
|---|
| 459 | def set_depths_evenly(self,volume): |
|---|
| 460 | """ Distribute volume over all exchange |
|---|
| 461 | cells with equal depth of water |
|---|
| 462 | """ |
|---|
| 463 | new_depth = self.get_average_depth() + (volume/self.get_area()) |
|---|
| 464 | self.set_depths(new_depth) |
|---|
| 465 | |
|---|
| 466 | def get_master_proc(self): |
|---|
| 467 | return self.master_proc |
|---|
| 468 | |
|---|
| 469 | def __parallel_safe(self): |
|---|
| 470 | |
|---|
| 471 | return True |
|---|
| 472 | |
|---|
| 473 | def statistics(self): |
|---|
| 474 | # WARNING: requires synchronization, must be called by all procs associated |
|---|
| 475 | # with this inlet |
|---|
| 476 | |
|---|
| 477 | message = '' |
|---|
| 478 | |
|---|
| 479 | tri_indices = {} |
|---|
| 480 | |
|---|
| 481 | if self.myid == self.master_proc: |
|---|
| 482 | tri_indices[self.myid] = self.triangle_indices |
|---|
| 483 | |
|---|
| 484 | for proc in self.procs: |
|---|
| 485 | if proc == self.master_proc: continue |
|---|
| 486 | |
|---|
| 487 | tri_indices[proc] = pypar.receive(proc) |
|---|
| 488 | |
|---|
| 489 | else: |
|---|
| 490 | pypar.send(self.triangle_indices, self.master_proc) |
|---|
| 491 | |
|---|
| 492 | |
|---|
| 493 | if self.myid == self.master_proc: |
|---|
| 494 | message += '=====================================\n' |
|---|
| 495 | message += 'Inlet\n' |
|---|
| 496 | message += '=====================================\n' |
|---|
| 497 | |
|---|
| 498 | for proc in self.procs: |
|---|
| 499 | message += '======> inlet triangle indices and centres at P%d\n' %(proc) |
|---|
| 500 | message += '%s' % tri_indices[proc] |
|---|
| 501 | message += '\n' |
|---|
| 502 | |
|---|
| 503 | message += '%s' % self.domain.get_centroid_coordinates()[tri_indices[proc]] |
|---|
| 504 | message += '\n' |
|---|
| 505 | |
|---|
| 506 | message += 'line\n' |
|---|
| 507 | message += '%s' % self.line |
|---|
| 508 | message += '\n' |
|---|
| 509 | |
|---|
| 510 | return message |
|---|
| 511 | |
|---|
| 512 | __author__="pete" |
|---|
| 513 | __date__ ="$16/08/2011 6:49:42 PM$" |
|---|
| 514 | |
|---|
| 515 | if __name__ == "__main__": |
|---|
| 516 | print "Hello World" |
|---|
