Mercurial Repositories > eric / file comparison
comparison: eric6/DebugClients/Python/DebugVariables.py
eric6/DebugClients/Python/DebugVariables.py
- changeset 6942
- 2602857055c5
- parent 6645
- ad476851d7e0
- child 6952
- 31602c3f09fd
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| 6941:f99d60d6b59b | 6942:2602857055c5 |
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| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2016 - 2019 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing classes and functions to dump variable contents. | |
| 8 """ | |
| 9 | |
| 10 # | |
| 11 # This code was inspired by pydevd. | |
| 12 # | |
| 13 | |
| 14 MaxItemsToHandle = 300 | |
| 15 TooLargeMessage = ("Too large to show contents. Max items to show: " + | |
| 16 str(MaxItemsToHandle)) | |
| 17 TooLargeAttribute = "Too large to be handled." | |
| 18 | |
| 19 ############################################################ | |
| 20 ## Classes implementing resolvers for various compund types | |
| 21 ############################################################ | |
| 22 | |
| 23 | |
| 24 class BaseResolver(object): | |
| 25 """ | |
| 26 Base class of the resolver class tree. | |
| 27 """ | |
| 28 def resolve(self, var, attribute): | |
| 29 """ | |
| 30 Public method to get an attribute from a variable. | |
| 31 | |
| 32 @param var variable to extract an attribute or value from | |
| 33 @type any | |
| 34 @param attribute name of the attribute to extract | |
| 35 @type str | |
| 36 @return value of the attribute | |
| 37 @rtype any | |
| 38 @exception NotImplementedError raised to indicate a missing | |
| 39 implementation | |
| 40 """ # __IGNORE_WARNING_D235__ | |
| 41 raise NotImplementedError | |
| 42 | |
| 43 def getDictionary(self, var): | |
| 44 """ | |
| 45 Public method to get the attributes of a variable as a dictionary. | |
| 46 | |
| 47 @param var variable to be converted | |
| 48 @type any | |
| 49 @return dictionary containing the variable attributes | |
| 50 @rtype dict | |
| 51 @exception NotImplementedError raised to indicate a missing | |
| 52 implementation | |
| 53 """ # __IGNORE_WARNING_D235__ | |
| 54 raise NotImplementedError | |
| 55 | |
| 56 | |
| 57 ############################################################ | |
| 58 ## Default Resolver | |
| 59 ############################################################ | |
| 60 | |
| 61 | |
| 62 class DefaultResolver(BaseResolver): | |
| 63 """ | |
| 64 Class used to resolve the default way. | |
| 65 """ | |
| 66 def resolve(self, var, attribute): | |
| 67 """ | |
| 68 Public method to get an attribute from a variable. | |
| 69 | |
| 70 @param var variable to extract an attribute or value from | |
| 71 @type any | |
| 72 @param attribute name of the attribute to extract | |
| 73 @type str | |
| 74 @return value of the attribute | |
| 75 @rtype any | |
| 76 """ | |
| 77 return getattr(var, attribute, None) | |
| 78 | |
| 79 def getDictionary(self, var): | |
| 80 """ | |
| 81 Public method to get the attributes of a variable as a dictionary. | |
| 82 | |
| 83 @param var variable to be converted | |
| 84 @type any | |
| 85 @return dictionary containing the variable attributes | |
| 86 @rtype dict | |
| 87 """ | |
| 88 names = dir(var) | |
| 89 if not names and hasattr(var, "__members__"): | |
| 90 names = var.__members__ | |
| 91 | |
| 92 d = {} | |
| 93 for name in names: | |
| 94 try: | |
| 95 attribute = getattr(var, name) | |
| 96 d[name] = attribute | |
| 97 except Exception: | |
| 98 pass # if we can't get it, simply ignore it | |
| 99 | |
| 100 return d | |
| 101 | |
| 102 | |
| 103 ############################################################ | |
| 104 ## Resolver for Dictionaries | |
| 105 ############################################################ | |
| 106 | |
| 107 | |
| 108 class DictResolver(BaseResolver): | |
| 109 """ | |
| 110 Class used to resolve from a dictionary. | |
| 111 """ | |
| 112 def resolve(self, var, attribute): | |
| 113 """ | |
| 114 Public method to get an attribute from a variable. | |
| 115 | |
| 116 @param var variable to extract an attribute or value from | |
| 117 @type dict | |
| 118 @param attribute name of the attribute to extract | |
| 119 @type str | |
| 120 @return value of the attribute | |
| 121 @rtype any | |
| 122 """ | |
| 123 if attribute in ('___len___', TooLargeAttribute): | |
| 124 return None | |
| 125 | |
| 126 if "(ID:" not in attribute: | |
| 127 try: | |
| 128 return var[attribute] | |
| 129 except Exception: | |
| 130 return getattr(var, attribute, None) | |
| 131 | |
| 132 expectedID = int(attribute.split("(ID:")[-1][:-1]) | |
| 133 for key, value in var.items(): | |
| 134 if id(key) == expectedID: | |
| 135 return value | |
| 136 | |
| 137 return None | |
| 138 | |
| 139 def keyToStr(self, key): | |
| 140 """ | |
| 141 Public method to get a string representation for a key. | |
| 142 | |
| 143 @param key key to be converted | |
| 144 @type any | |
| 145 @return string representation of the given key | |
| 146 @rtype str | |
| 147 """ | |
| 148 if isinstance(key, str): | |
| 149 return repr(key) | |
| 150 else: | |
| 151 return key | |
| 152 | |
| 153 def getDictionary(self, var): | |
| 154 """ | |
| 155 Public method to get the attributes of a variable as a dictionary. | |
| 156 | |
| 157 @param var variable to be converted | |
| 158 @type any | |
| 159 @return dictionary containing the variable attributes | |
| 160 @rtype dict | |
| 161 """ | |
| 162 d = {} | |
| 163 count = 0 | |
| 164 for key, value in var.items(): | |
| 165 count += 1 | |
| 166 key = "{0} (ID:{1})".format(self.keyToStr(key), id(key)) | |
| 167 d[key] = value | |
| 168 if count > MaxItemsToHandle: | |
| 169 d[TooLargeAttribute] = TooLargeMessage | |
| 170 break | |
| 171 | |
| 172 d["___len___"] = len(var) | |
| 173 | |
| 174 # in case it has additional fields | |
| 175 additionals = defaultResolver.getDictionary(var) | |
| 176 d.update(additionals) | |
| 177 | |
| 178 return d | |
| 179 | |
| 180 | |
| 181 ############################################################ | |
| 182 ## Resolver for Lists and Tuples | |
| 183 ############################################################ | |
| 184 | |
| 185 | |
| 186 class ListResolver(BaseResolver): | |
| 187 """ | |
| 188 Class used to resolve from a tuple or list. | |
| 189 """ | |
| 190 def resolve(self, var, attribute): | |
| 191 """ | |
| 192 Public method to get an attribute from a variable. | |
| 193 | |
| 194 @param var variable to extract an attribute or value from | |
| 195 @type tuple or list | |
| 196 @param attribute name of the attribute to extract | |
| 197 @type str | |
| 198 @return value of the attribute | |
| 199 @rtype any | |
| 200 """ | |
| 201 if attribute in ('___len___', TooLargeAttribute): | |
| 202 return None | |
| 203 | |
| 204 try: | |
| 205 return var[int(attribute)] | |
| 206 except Exception: | |
| 207 return getattr(var, attribute, None) | |
| 208 | |
| 209 def getDictionary(self, var): | |
| 210 """ | |
| 211 Public method to get the attributes of a variable as a dictionary. | |
| 212 | |
| 213 @param var variable to be converted | |
| 214 @type any | |
| 215 @return dictionary containing the variable attributes | |
| 216 @rtype dict | |
| 217 """ | |
| 218 d = {} | |
| 219 count = 0 | |
| 220 for value in var: | |
| 221 d[str(count)] = value | |
| 222 count += 1 | |
| 223 if count > MaxItemsToHandle: | |
| 224 d[TooLargeAttribute] = TooLargeMessage | |
| 225 break | |
| 226 | |
| 227 d["___len___"] = len(var) | |
| 228 | |
| 229 # in case it has additional fields | |
| 230 additionals = defaultResolver.getDictionary(var) | |
| 231 d.update(additionals) | |
| 232 | |
| 233 return d | |
| 234 | |
| 235 | |
| 236 ############################################################ | |
| 237 ## Resolver for Sets and Frozensets | |
| 238 ############################################################ | |
| 239 | |
| 240 | |
| 241 class SetResolver(BaseResolver): | |
| 242 """ | |
| 243 Class used to resolve from a set or frozenset. | |
| 244 """ | |
| 245 def resolve(self, var, attribute): | |
| 246 """ | |
| 247 Public method to get an attribute from a variable. | |
| 248 | |
| 249 @param var variable to extract an attribute or value from | |
| 250 @type tuple or list | |
| 251 @param attribute id of the value to extract | |
| 252 @type str | |
| 253 @return value of the attribute | |
| 254 @rtype any | |
| 255 """ | |
| 256 if attribute in ('___len___', TooLargeAttribute): | |
| 257 return None | |
| 258 | |
| 259 if attribute.startswith("ID: "): | |
| 260 attribute = attribute.split(None, 1)[1] | |
| 261 try: | |
| 262 attribute = int(attribute) | |
| 263 except Exception: | |
| 264 return getattr(var, attribute, None) | |
| 265 | |
| 266 for v in var: | |
| 267 if id(v) == attribute: | |
| 268 return v | |
| 269 | |
| 270 return None | |
| 271 | |
| 272 def getDictionary(self, var): | |
| 273 """ | |
| 274 Public method to get the attributes of a variable as a dictionary. | |
| 275 | |
| 276 @param var variable to be converted | |
| 277 @type any | |
| 278 @return dictionary containing the variable attributes | |
| 279 @rtype dict | |
| 280 """ | |
| 281 d = {} | |
| 282 count = 0 | |
| 283 for value in var: | |
| 284 count += 1 | |
| 285 d["ID: " + str(id(value))] = value | |
| 286 if count > MaxItemsToHandle: | |
| 287 d[TooLargeAttribute] = TooLargeMessage | |
| 288 break | |
| 289 | |
| 290 d["___len___"] = len(var) | |
| 291 | |
| 292 # in case it has additional fields | |
| 293 additionals = defaultResolver.getDictionary(var) | |
| 294 d.update(additionals) | |
| 295 | |
| 296 return d | |
| 297 | |
| 298 | |
| 299 ############################################################ | |
| 300 ## Resolver for Numpy Arrays | |
| 301 ############################################################ | |
| 302 | |
| 303 | |
| 304 class NdArrayResolver(BaseResolver): | |
| 305 """ | |
| 306 Class used to resolve from numpy ndarray including some meta data. | |
| 307 """ | |
| 308 def __isNumeric(self, arr): | |
| 309 """ | |
| 310 Private method to check, if an array is of a numeric type. | |
| 311 | |
| 312 @param arr array to check | |
| 313 @type ndarray | |
| 314 @return flag indicating a numeric array | |
| 315 @rtype bool | |
| 316 """ | |
| 317 try: | |
| 318 return arr.dtype.kind in 'biufc' | |
| 319 except AttributeError: | |
| 320 return False | |
| 321 | |
| 322 def resolve(self, var, attribute): | |
| 323 """ | |
| 324 Public method to get an attribute from a variable. | |
| 325 | |
| 326 @param var variable to extract an attribute or value from | |
| 327 @type tuple or list | |
| 328 @param attribute id of the value to extract | |
| 329 @type str | |
| 330 @return value of the attribute | |
| 331 @rtype any | |
| 332 """ | |
| 333 if attribute == '__internals__': | |
| 334 return defaultResolver.getDictionary(var) | |
| 335 | |
| 336 if attribute == 'min': | |
| 337 if self.__isNumeric(var): | |
| 338 return var.min() | |
| 339 else: | |
| 340 return None | |
| 341 | |
| 342 if attribute == 'max': | |
| 343 if self.__isNumeric(var): | |
| 344 return var.max() | |
| 345 else: | |
| 346 return None | |
| 347 | |
| 348 if attribute == 'mean': | |
| 349 if self.__isNumeric(var): | |
| 350 return var.mean() | |
| 351 else: | |
| 352 return None | |
| 353 | |
| 354 if attribute == 'shape': | |
| 355 return var.shape | |
| 356 | |
| 357 if attribute == 'dtype': | |
| 358 return var.dtype | |
| 359 | |
| 360 if attribute == 'size': | |
| 361 return var.size | |
| 362 | |
| 363 if attribute.startswith('['): | |
| 364 container = NdArrayItemsContainer() | |
| 365 count = 0 | |
| 366 for element in var: | |
| 367 setattr(container, str(count), element) | |
| 368 count += 1 | |
| 369 if count > MaxItemsToHandle: | |
| 370 setattr(container, TooLargeAttribute, TooLargeMessage) | |
| 371 break | |
| 372 return container | |
| 373 | |
| 374 return None | |
| 375 | |
| 376 def getDictionary(self, var): | |
| 377 """ | |
| 378 Public method to get the attributes of a variable as a dictionary. | |
| 379 | |
| 380 @param var variable to be converted | |
| 381 @type any | |
| 382 @return dictionary containing the variable attributes | |
| 383 @rtype dict | |
| 384 """ | |
| 385 d = {} | |
| 386 d['__internals__'] = defaultResolver.getDictionary(var) | |
| 387 if var.size > 1024 * 1024: | |
| 388 d['min'] = 'ndarray too big, calculating min would slow down' \ | |
| 389 ' debugging' | |
| 390 d['max'] = 'ndarray too big, calculating max would slow down' \ | |
| 391 ' debugging' | |
| 392 else: | |
| 393 if self.__isNumeric(var): | |
| 394 d['min'] = var.min() | |
| 395 d['max'] = var.max() | |
| 396 d['mean'] = var.mean() | |
| 397 else: | |
| 398 d['min'] = 'not a numeric object' | |
| 399 d['max'] = 'not a numeric object' | |
| 400 d['mean'] = 'not a numeric object' | |
| 401 d['shape'] = var.shape | |
| 402 d['dtype'] = var.dtype | |
| 403 d['size'] = var.size | |
| 404 d['[0:{0}]'.format(len(var) - 1)] = list(var[0:MaxItemsToHandle]) | |
| 405 return d | |
| 406 | |
| 407 | |
| 408 class NdArrayItemsContainer: | |
| 409 """ | |
| 410 Class to store ndarray items. | |
| 411 """ | |
| 412 pass | |
| 413 | |
| 414 | |
| 415 ############################################################ | |
| 416 ## Resolver for Django Multi Value Dictionaries | |
| 417 ############################################################ | |
| 418 | |
| 419 | |
| 420 class MultiValueDictResolver(DictResolver): | |
| 421 """ | |
| 422 Class used to resolve from Django multi value dictionaries. | |
| 423 """ | |
| 424 def resolve(self, var, attribute): | |
| 425 """ | |
| 426 Public method to get an attribute from a variable. | |
| 427 | |
| 428 @param var variable to extract an attribute or value from | |
| 429 @type dict | |
| 430 @param attribute name of the attribute to extract | |
| 431 @type str | |
| 432 @return value of the attribute | |
| 433 @rtype any | |
| 434 """ | |
| 435 if attribute in ('___len___', TooLargeAttribute): | |
| 436 return None | |
| 437 | |
| 438 if "(ID:" not in attribute: | |
| 439 try: | |
| 440 return var[attribute] | |
| 441 except Exception: | |
| 442 return getattr(var, attribute, None) | |
| 443 | |
| 444 expectedID = int(attribute.split("(ID:")[-1][:-1]) | |
| 445 for key in var.keys(): | |
| 446 if id(key) == expectedID: | |
| 447 value = var.getlist(key) | |
| 448 return value | |
| 449 | |
| 450 return None | |
| 451 | |
| 452 def getDictionary(self, var): | |
| 453 """ | |
| 454 Public method to get the attributes of a variable as a dictionary. | |
| 455 | |
| 456 @param var variable to be converted | |
| 457 @type any | |
| 458 @return dictionary containing the variable attributes | |
| 459 @rtype dict | |
| 460 """ | |
| 461 d = {} | |
| 462 count = 0 | |
| 463 for key in var.keys(): | |
| 464 count += 1 | |
| 465 value = var.getlist(key) | |
| 466 key = "{0} (ID:{1})".format(self.keyToStr(key), id(key)) | |
| 467 d[key] = value | |
| 468 if count > MaxItemsToHandle: | |
| 469 d[TooLargeAttribute] = TooLargeMessage | |
| 470 break | |
| 471 | |
| 472 d["___len___"] = len(var) | |
| 473 | |
| 474 return d | |
| 475 | |
| 476 | |
| 477 ############################################################ | |
| 478 ## Resolver for array.array | |
| 479 ############################################################ | |
| 480 | |
| 481 | |
| 482 class ArrayResolver(BaseResolver): | |
| 483 """ | |
| 484 Class used to resolve from array.array including some meta data. | |
| 485 """ | |
| 486 TypeCodeMap = { | |
| 487 "b": "int (signed char)", | |
| 488 "B": "int (unsigned char)", | |
| 489 "u": "Unicode character (Py_UNICODE)", | |
| 490 "h": "int (signed short)", | |
| 491 "H": "int (unsigned short)", | |
| 492 "i": "int (signed int)", | |
| 493 "I": "int (unsigned int)", | |
| 494 "l": "int (signed long)", | |
| 495 "L": "int (unsigned long)", | |
| 496 "q": "int (signed long long)", | |
| 497 "Q": "int (unsigned long long)", | |
| 498 "f": "float (float)", | |
| 499 "d": "float (double)", | |
| 500 } | |
| 501 | |
| 502 def resolve(self, var, attribute): | |
| 503 """ | |
| 504 Public method to get an attribute from a variable. | |
| 505 | |
| 506 @param var variable to extract an attribute or value from | |
| 507 @type tuple or list | |
| 508 @param attribute id of the value to extract | |
| 509 @type str | |
| 510 @return value of the attribute | |
| 511 @rtype any | |
| 512 """ | |
| 513 if attribute == 'itemsize': | |
| 514 return var.itemsize | |
| 515 | |
| 516 if attribute == 'typecode': | |
| 517 return var.typecode | |
| 518 | |
| 519 if attribute == 'type': | |
| 520 if var.typecode in ArrayResolver.TypeCodeMap: | |
| 521 return ArrayResolver.TypeCodeMap[var.typecode] | |
| 522 else: | |
| 523 return 'illegal type' | |
| 524 | |
| 525 if attribute.startswith('['): | |
| 526 container = ArrayItemsContainer() | |
| 527 count = 0 | |
| 528 for element in var: | |
| 529 setattr(container, str(count), element) | |
| 530 count += 1 | |
| 531 if count > MaxItemsToHandle: | |
| 532 setattr(container, TooLargeAttribute, TooLargeMessage) | |
| 533 break | |
| 534 return container | |
| 535 | |
| 536 return None | |
| 537 | |
| 538 def getDictionary(self, var): | |
| 539 """ | |
| 540 Public method to get the attributes of a variable as a dictionary. | |
| 541 | |
| 542 @param var variable to be converted | |
| 543 @type any | |
| 544 @return dictionary containing the variable attributes | |
| 545 @rtype dict | |
| 546 """ | |
| 547 d = {} | |
| 548 d['typecode'] = var.typecode | |
| 549 if var.typecode in ArrayResolver.TypeCodeMap: | |
| 550 d['type'] = ArrayResolver.TypeCodeMap[var.typecode] | |
| 551 else: | |
| 552 d['type'] = 'illegal type' | |
| 553 d['itemsize'] = var.itemsize | |
| 554 d['[0:{0}]'.format(len(var) - 1)] = var.tolist()[0:MaxItemsToHandle] | |
| 555 return d | |
| 556 | |
| 557 | |
| 558 class ArrayItemsContainer: | |
| 559 """ | |
| 560 Class to store array.array items. | |
| 561 """ | |
| 562 pass | |
| 563 | |
| 564 | |
| 565 defaultResolver = DefaultResolver() | |
| 566 dictResolver = DictResolver() | |
| 567 listResolver = ListResolver() | |
| 568 setResolver = SetResolver() | |
| 569 ndarrayResolver = NdArrayResolver() | |
| 570 multiValueDictResolver = MultiValueDictResolver() | |
| 571 arrayResolver = ArrayResolver() | |
| 572 | |
| 573 ############################################################ | |
| 574 ## Methods to determine the type of a variable and the | |
| 575 ## resolver class to use | |
| 576 ############################################################ | |
| 577 | |
| 578 _TypeMap = None | |
| 579 | |
| 580 | |
| 581 def _initTypeMap(): | |
| 582 """ | |
| 583 Protected function to initialize the type map. | |
| 584 """ | |
| 585 global _TypeMap | |
| 586 | |
| 587 _TypeMap = [ | |
| 588 (type(None), None,), | |
| 589 (int, None), | |
| 590 (float, None), | |
| 591 (complex, None), | |
| 592 (str, None), | |
| 593 (tuple, listResolver), | |
| 594 (list, listResolver), | |
| 595 (dict, dictResolver), | |
| 596 ] | |
| 597 | |
| 598 try: | |
| 599 _TypeMap.append((long, None)) # __IGNORE_WARNING__ | |
| 600 except Exception: | |
| 601 pass # not available on all python versions | |
| 602 | |
| 603 try: | |
| 604 _TypeMap.append((unicode, None)) # __IGNORE_WARNING__ | |
| 605 except Exception: | |
| 606 pass # not available on all python versions | |
| 607 | |
| 608 try: | |
| 609 _TypeMap.append((set, setResolver)) # __IGNORE_WARNING__ | |
| 610 except Exception: | |
| 611 pass # not available on all python versions | |
| 612 | |
| 613 try: | |
| 614 _TypeMap.append((frozenset, setResolver)) # __IGNORE_WARNING__ | |
| 615 except Exception: | |
| 616 pass # not available on all python versions | |
| 617 | |
| 618 try: | |
| 619 import array | |
| 620 _TypeMap.append((array.array, arrayResolver)) | |
| 621 except ImportError: | |
| 622 pass # array.array may not be available | |
| 623 | |
| 624 try: | |
| 625 import numpy | |
| 626 _TypeMap.append((numpy.ndarray, ndarrayResolver)) | |
| 627 except ImportError: | |
| 628 pass # numpy may not be installed | |
| 629 | |
| 630 try: | |
| 631 from django.utils.datastructures import MultiValueDict | |
| 632 _TypeMap.insert(0, (MultiValueDict, multiValueDictResolver)) | |
| 633 # it should go before dict | |
| 634 except ImportError: | |
| 635 pass # django may not be installed | |
| 636 | |
| 637 | |
| 638 def getType(obj): | |
| 639 """ | |
| 640 Public method to get the type information for an object. | |
| 641 | |
| 642 @param obj object to get type information for | |
| 643 @type any | |
| 644 @return tuple containing the type, type name, type string and resolver | |
| 645 @rtype tuple of type, str, str, BaseResolver | |
| 646 """ | |
| 647 typeObject = type(obj) | |
| 648 typeName = typeObject.__name__ | |
| 649 typeStr = str(typeObject)[8:-2] | |
| 650 | |
| 651 if typeStr.startswith(("PyQt5.", "PyQt4.")): | |
| 652 resolver = None | |
| 653 else: | |
| 654 if _TypeMap is None: | |
| 655 _initTypeMap() | |
| 656 | |
| 657 for typeData in _TypeMap: | |
| 658 if isinstance(obj, typeData[0]): | |
| 659 resolver = typeData[1] | |
| 660 break | |
| 661 else: | |
| 662 resolver = defaultResolver | |
| 663 | |
| 664 return typeObject, typeName, typeStr, resolver | |
| 665 | |
| 666 # | |
| 667 # eflag: noqa = M702 |
