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GeezerVison is showing github.com — cpython/Lib/logging/__init__.py at 3.15 · python/cpython Expand file tree/ Copy path__init__.pyMore file actions 2369 lines (2041 loc) · 83.6 KB / Copy path__init__.pyFile metadata and controls2369 lines (2041 loc) · 83.6 KB 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 # Copyright 2001-2022 by Vinay Sajip. All Rights Reserved. # # Permission to use, copy, modify, and distribute this software and its # documentation for any purpose and without fee is hereby granted, # provided that the above copyright notice appear in all copies and that # both that copyright notice and this permission notice appear in # supporting documentation, and that the name of Vinay Sajip # not be used in advertising or publicity pertaining to distribution # of the software without specific, written prior permission. # VINAY SAJIP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING # ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL # VINAY SAJIP BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR # ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER # IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. """ Logging package for Python. Based on PEP 282 and comments thereto in comp.lang.python. Copyright (C) 2001-2022 Vinay Sajip. All Rights Reserved. To use, simply 'import logging' and log away! """ import sys, os, time, io, re, traceback, warnings, weakref, collections.abc from types import GenericAlias from string import Template from string import Formatter as StrFormatter __all__ = ['BASIC_FORMAT', 'BufferingFormatter', 'CRITICAL', 'DEBUG', 'ERROR', 'FATAL', 'FileHandler', 'Filter', 'Formatter', 'Handler', 'INFO', 'LogRecord', 'Logger', 'LoggerAdapter', 'NOTSET', 'NullHandler', 'StreamHandler', 'WARN', 'WARNING', 'addLevelName', 'basicConfig', 'captureWarnings', 'critical', 'debug', 'disable', 'error', 'exception', 'fatal', 'getLevelName', 'getLogger', 'getLoggerClass', 'info', 'log', 'makeLogRecord', 'setLoggerClass', 'shutdown', 'warn', 'warning', 'getLogRecordFactory', 'setLogRecordFactory', 'lastResort', 'raiseExceptions', 'getLevelNamesMapping', 'getHandlerByName', 'getHandlerNames'] import threading __status__ = "production" #--------------------------------------------------------------------------- # Miscellaneous module data #--------------------------------------------------------------------------- # #_startTime is used as the base when calculating the relative time of events # _startTime = time.time_ns() # #raiseExceptions is used to see if exceptions during handling should be #propagated # raiseExceptions = True # # If you don't want threading information in the log, set this to False # logThreads = True # # If you don't want multiprocessing information in the log, set this to False # logMultiprocessing = True # # If you don't want process information in the log, set this to False # logProcesses = True # # If you don't want asyncio task information in the log, set this to False # logAsyncioTasks = True #--------------------------------------------------------------------------- # Level related stuff #--------------------------------------------------------------------------- # # Default levels and level names, these can be replaced with any positive set # of values having corresponding names. There is a pseudo-level, NOTSET, which # is only really there as a lower limit for user-defined levels. Handlers and # loggers are initialized with NOTSET so that they will log all messages, even # at user-defined levels. # CRITICAL = 50 FATAL = CRITICAL ERROR = 40 WARNING = 30 WARN = WARNING INFO = 20 DEBUG = 10 NOTSET = 0 _levelToName = { CRITICAL: 'CRITICAL', ERROR: 'ERROR', WARNING: 'WARNING', INFO: 'INFO', DEBUG: 'DEBUG', NOTSET: 'NOTSET', } _nameToLevel = { 'CRITICAL': CRITICAL, 'FATAL': FATAL, 'ERROR': ERROR, 'WARN': WARNING, 'WARNING': WARNING, 'INFO': INFO, 'DEBUG': DEBUG, 'NOTSET': NOTSET, } def getLevelNamesMapping(): return _nameToLevel.copy() def getLevelName(level): """ Return the textual or numeric representation of logging level 'level'. If the level is one of the predefined levels (CRITICAL, ERROR, WARNING, INFO, DEBUG) then you get the corresponding string. If you have associated levels with names using addLevelName then the name you have associated with 'level' is returned. If a numeric value corresponding to one of the defined levels is passed in, the corresponding string representation is returned. If a string representation of the level is passed in, the corresponding numeric value is returned. If no matching numeric or string value is passed in, the string 'Level %s' % level is returned. """ # See Issues #22386, #27937 and #29220 for why it's this way result = _levelToName.get(level) if result is not None: return result result = _nameToLevel.get(level) if result is not None: return result return "Level %s" % level def addLevelName(level, levelName): """ Associate 'levelName' with 'level'. This is used when converting levels to text during message formatting. """ with _lock: _levelToName[level] = levelName _nameToLevel[levelName] = level if hasattr(sys, "_getframe"): currentframe = lambda: sys._getframe(1) else: #pragma: no cover def currentframe(): """Return the frame object for the caller's stack frame.""" try: raise Exception except Exception as exc: return exc.__traceback__.tb_frame.f_back # # _srcfile is used when walking the stack to check when we've got the first # caller stack frame, by skipping frames whose filename is that of this # module's source. It therefore should contain the filename of this module's # source file. # # Ordinarily we would use __file__ for this, but frozen modules don't always # have __file__ set, for some reason (see Issue #21736). Thus, we get the # filename from a handy code object from a function defined in this module. # (There's no particular reason for picking addLevelName.) # _srcfile = os.path.normcase(addLevelName.__code__.co_filename) # _srcfile is only used in conjunction with sys._getframe(). # Setting _srcfile to None will prevent findCaller() from being called. This # way, you can avoid the overhead of fetching caller information. # The following is based on warnings._is_internal_frame. It makes sure that # frames of the import mechanism are skipped when logging at module level and # using a stacklevel value greater than one. def _is_internal_frame(frame): """Signal whether the frame is a CPython or logging module internal.""" filename = os.path.normcase(frame.f_code.co_filename) return filename == _srcfile or ( "importlib" in filename and "_bootstrap" in filename ) def _checkLevel(level): if isinstance(level, int): rv = level elif str(level) == level: if level not in _nameToLevel: raise ValueError("Unknown level: %r" % level) rv = _nameToLevel[level] else: raise TypeError("Level not an integer or a valid string: %r" % (level,)) return rv #--------------------------------------------------------------------------- # Thread-related stuff #--------------------------------------------------------------------------- # #_lock is used to serialize access to shared data structures in this module. #This needs to be an RLock because fileConfig() creates and configures #Handlers, and so might arbitrary user threads. Since Handler code updates the #shared dictionary _handlers, it needs to acquire the lock. But if configuring, #the lock would already have been acquired - so we need an RLock. #The same argument applies to Loggers and Manager.loggerDict. # _lock = threading.RLock() def _prepareFork(): """ Prepare to fork a new child process by acquiring the module-level lock. This should be used in conjunction with _afterFork(). """ # Wrap the lock acquisition in a try-except to prevent the lock from being # abandoned in the event of an asynchronous exception. See gh-106238. try: _lock.acquire() except BaseException: _lock.release() raise def _afterFork(): """ After a new child process has been forked, release the module-level lock. This should be used in conjunction with _prepareFork(). """ _lock.release() # Prevent a held logging lock from blocking a child from logging. if not hasattr(os, 'register_at_fork'): # Windows and friends. def _register_at_fork_reinit_lock(instance): pass # no-op when os.register_at_fork does not exist. else: # A collection of instances with a _at_fork_reinit method (logging.Handler) # to be called in the child after forking. The weakref avoids us keeping # discarded Handler instances alive. _at_fork_reinit_lock_weakset = weakref.WeakSet() def _register_at_fork_reinit_lock(instance): with _lock: _at_fork_reinit_lock_weakset.add(instance) def _after_at_fork_child_reinit_locks(): for handler in _at_fork_reinit_lock_weakset: handler._at_fork_reinit() # _prepareFork() was called in the parent before forking. # The lock is reinitialized to unlocked state. _lock._at_fork_reinit() os.register_at_fork(before=_prepareFork, after_in_child=_after_at_fork_child_reinit_locks, after_in_parent=_afterFork) #--------------------------------------------------------------------------- # The logging record #--------------------------------------------------------------------------- class LogRecord(object): """ A LogRecord instance represents an event being logged. LogRecord instances are created every time something is logged. They contain all the information pertinent to the event being logged. The main information passed in is in msg and args, which are combined using str(msg) % args to create the message field of the record. The record also includes information such as when the record was created, the source line where the logging call was made, and any exception information to be logged. """ def __init__(self, name, level, pathname, lineno, msg, args, exc_info, func=None, sinfo=None, **kwargs): """ Initialize a logging record with interesting information. """ ct = time.time_ns() self.name = name self.msg = msg # # The following statement allows passing of a dictionary as a sole # argument, so that you can do something like # logging.debug("a %(a)d b %(b)s", {'a':1, 'b':2}) # Suggested by Stefan Behnel. # Note that without the test for args[0], we get a problem because # during formatting, we test to see if the arg is present using # 'if self.args:'. If the event being logged is e.g. 'Value is %d' # and if the passed arg fails 'if self.args:' then no formatting # is done. For example, logger.warning('Value is %d', 0) would log # 'Value is %d' instead of 'Value is 0'. # For the use case of passing a dictionary, this should not be a # problem. # Issue #21172: a request was made to relax the isinstance check # to hasattr(args[0], '__getitem__'). However, the docs on string # formatting still seem to suggest a mapping object is required. # Thus, while not removing the isinstance check, it does now look # for collections.abc.Mapping rather than, as before, dict. if (args and len(args) == 1 and isinstance(args[0], collections.abc.Mapping) and args[0]): args = args[0] self.args = args self.levelname = getLevelName(level) self.levelno = level self.pathname = pathname try: self.filename = os.path.basename(pathname) self.module = os.path.splitext(self.filename)[0] except (TypeError, ValueError, AttributeError): self.filename = pathname self.module = "Unknown module" self.exc_info = exc_info self.exc_text = None # used to cache the traceback text self.stack_info = sinfo self.lineno = lineno self.funcName = func self.created = ct / 1e9 # ns to float seconds # Get the number of whole milliseconds (0-999) in the fractional part of seconds. # Eg: 1_677_903_920_999_998_503 ns --> 999_998_503 ns--> 999 ms # Convert to float by adding 0.0 for historical reasons. See gh-89047 self.msecs = (ct % 1_000_000_000) // 1_000_000 + 0.0 if self.msecs == 999.0 and int(self.created) != ct // 1_000_000_000: # ns -> sec conversion can round up, e.g: # 1_677_903_920_999_999_900 ns --> 1_677_903_921.0 sec self.msecs = 0.0 self.relativeCreated = (ct - _startTime) / 1e6 if logThreads: self.thread = threading.get_ident() self.threadName = threading.current_thread().name else: # pragma: no cover self.thread = None self.threadName = None if not logMultiprocessing: # pragma: no cover self.processName = None else: self.processName = 'MainProcess' mp = sys.modules.get('multiprocessing') if mp is not None: # Errors may occur if multiprocessing has not finished loading # yet - e.g. if a custom import hook causes third-party code # to run when multiprocessing calls import. See issue 8200 # for an example try: self.processName = mp.current_process().name except Exception: #pragma: no cover pass if logProcesses and hasattr(os, 'getpid'): self.process = os.getpid() else: self.process = None self.taskName = None if logAsyncioTasks: asyncio = sys.modules.get('asyncio') if asyncio: try: self.taskName = asyncio.current_task().get_name() except Exception: pass def __repr__(self): return '<LogRecord: %s, %s, %s, %s, "%s">'%(self.name, self.levelno, self.pathname, self.lineno, self.msg) def getMessage(self): """ Return the message for this LogRecord. Return the message for this LogRecord after merging any user-supplied arguments with the message. """ msg = str(self.msg) if self.args: msg = msg % self.args return msg # # Determine which class to use when instantiating log records. # _logRecordFactory = LogRecord def setLogRecordFactory(factory): """ Set the factory to be used when instantiating a log record. :param factory: A callable which will be called to instantiate a log record. """ global _logRecordFactory _logRecordFactory = factory def getLogRecordFactory(): """ Return the factory to be used when instantiating a log record. """ return _logRecordFactory def makeLogRecord(dict): """ Make a LogRecord whose attributes are defined by the specified dictionary, This function is useful for converting a logging event received over a socket connection (which is sent as a dictionary) into a LogRecord instance. """ rv = _logRecordFactory(None, None, "", 0, "", (), None, None) rv.__dict__.update(dict) return rv #--------------------------------------------------------------------------- # Formatter classes and functions #--------------------------------------------------------------------------- _str_formatter = StrFormatter() del StrFormatter class PercentStyle(object): default_format = '%(message)s' asctime_format = '%(asctime)s' asctime_search = '%(asctime)' validation_pattern = re.compile(r'%\(\w+\)[#0+ -]*(\*|\d+)?(\.(\*|\d+))?[diouxefgcrsa%]', re.I) def __init__(self, fmt, *, defaults=None): self._fmt = fmt or self.default_format self._defaults = defaults def usesTime(self): return self._fmt.find(self.asctime_search) >= 0 def validate(self): """Validate the input format, ensure it matches the correct style""" if not self.validation_pattern.search(self._fmt): raise ValueError("Invalid format '%s' for '%s' style" % (self._fmt, self.default_format[0])) def _format(self, record): if defaults := self._defaults: values = defaults | record.__dict__ else: values = record.__dict__ return self._fmt % values def format(self, record): try: return self._format(record) except KeyError as e: raise ValueError('Formatting field not found in record: %s' % e) class StrFormatStyle(PercentStyle): default_format = '{message}' asctime_format = '{asctime}' asctime_search = '{asctime' fmt_spec = re.compile(r'^(.?[<>=^])?[+ -]?#?0?(\d+|{\w+})?[,_]?(\.(\d+|{\w+}))?[bcdefgnosx%]?$', re.I) field_spec = re.compile(r'^(\d+|\w+)(\.\w+|\[[^]]+\])*$') def _format(self, record): if defaults := self._defaults: values = defaults | record.__dict__ else: values = record.__dict__ return self._fmt.format(**values) def validate(self): """Validate the input format, ensure it is the correct string formatting style""" fields = set() try: for _, fieldname, spec, conversion in _str_formatter.parse(self._fmt): if fieldname: if not self.field_spec.match(fieldname): raise ValueError('invalid field name/expression: %r' % fieldname) fields.add(fieldname) if conversion and conversion not in 'rsa': raise ValueError('invalid conversion: %r' % conversion) if spec and not self.fmt_spec.match(spec): raise ValueError('bad specifier: %r' % spec) except ValueError as e: raise ValueError('invalid format: %s' % e) if not fields: raise ValueError('invalid format: no fields') class StringTemplateStyle(PercentStyle): default_format = '${message}' asctime_format = '${asctime}' asctime_search = '${asctime}' def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) self._tpl = Template(self._fmt) def usesTime(self): fmt = self._fmt return fmt.find('$asctime') >= 0 or fmt.find(self.asctime_search) >= 0 def validate(self): pattern = Template.pattern fields = set() for m in pattern.finditer(self._fmt): d = m.groupdict() if d['named']: fields.add(d['named']) elif d['braced']: fields.add(d['braced']) elif m.group(0) == '$': raise ValueError('invalid format: bare \'$\' not allowed') if not fields: raise ValueError('invalid format: no fields') def _format(self, record): if defaults := self._defaults: values = defaults | record.__dict__ else: values = record.__dict__ return self._tpl.substitute(**values) BASIC_FORMAT = "%(levelname)s:%(name)s:%(message)s" _STYLES = { '%': (PercentStyle, BASIC_FORMAT), '{': (StrFormatStyle, '{levelname}:{name}:{message}'), '$': (StringTemplateStyle, '${levelname}:${name}:${message}'), } class Formatter(object): """ Formatter instances are used to convert a LogRecord to text. Formatters need to know how a LogRecord is constructed. They are responsible for converting a LogRecord to (usually) a string which can be interpreted by either a human or an external system. The base Formatter allows a formatting string to be specified. If none is supplied, the style-dependent default value, "%(message)s", "{message}", or "${message}", is used. The Formatter can be initialized with a format string which makes use of knowledge of the LogRecord attributes - e.g. the default value mentioned above makes use of the fact that the user's message and arguments are pre- formatted into a LogRecord's message attribute. Currently, the useful attributes in a LogRecord are described by: %(name)s Name of the logger (logging channel) %(levelno)s Numeric logging level for the message (DEBUG, INFO, WARNING, ERROR, CRITICAL) %(levelname)s Text logging level for the message ("DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL") %(pathname)s Full pathname of the source file where the logging call was issued (if available) %(filename)s Filename portion of pathname %(module)s Module (name portion of filename) %(lineno)d Source line number where the logging call was issued (if available) %(funcName)s Function name %(created)f Time when the LogRecord was created (time.time_ns() / 1e9 return value) %(asctime)s Textual time when the LogRecord was created %(msecs)d Millisecond portion of the creation time %(relativeCreated)d Time in milliseconds when the LogRecord was created, relative to the time the logging module was loaded (typically at application startup time) %(thread)d Thread ID (if available) %(threadName)s Thread name (if available) %(taskName)s Task name (if available) %(process)d Process ID (if available) %(processName)s Process name (if available) %(message)s The result of record.getMessage(), computed just as the record is emitted """ converter = time.localtime def __init__(self, fmt=None, datefmt=None, style='%', validate=True, *, defaults=None): """ Initialize the formatter with specified format strings. Initialize the formatter either with the specified format string, or a default as described above. Allow for specialized date formatting with the optional datefmt argument. If datefmt is omitted, you get an ISO8601-like (or RFC 3339-like) format. Use a style parameter of '%', '{' or '$' to specify that you want to use one of %-formatting, :meth:`str.format` (``{}``) formatting or :class:`string.Template` formatting in your format string. .. versionchanged:: 3.2 Added the ``style`` parameter. """ if style not in _STYLES: raise ValueError('Style must be one of: %s' % ','.join( _STYLES.keys())) self._style = _STYLES[style][0](fmt, defaults=defaults) if validate: self._style.validate() self._fmt = self._style._fmt self.datefmt = datefmt def __repr__(self): return '<%s (%s)>' % (self.__class__.__name__, self._fmt) default_time_format = '%Y-%m-%d %H:%M:%S' default_msec_format = '%s,%03d' def formatTime(self, record, datefmt=None): """ Return the creation time of the specified LogRecord as formatted text. This method should be called from format() by a formatter which wants to make use of a formatted time. This method can be overridden in formatters to provide for any specific requirement, but the basic behaviour is as follows: if datefmt (a string) is specified, it is used with time.strftime() to format the creation time of the record. Otherwise, an ISO8601-like (or RFC 3339-like) format is used. The resulting string is returned. This function uses a user-configurable function to convert the creation time to a tuple. By default, time.localtime() is used; to change this for a particular formatter instance, set the 'converter' attribute to a function with the same signature as time.localtime() or time.gmtime(). To change it for all formatters, for example if you want all logging times to be shown in GMT, set the 'converter' attribute in the Formatter class. """ ct = self.converter(record.created) if datefmt: s = time.strftime(datefmt, ct) else: s = time.strftime(self.default_time_format, ct) if self.default_msec_format: s = self.default_msec_format % (s, record.msecs) return s def formatException(self, ei): """ Format and return the specified exception information as a string. This default implementation just uses traceback.print_exception() """ sio = io.StringIO() tb = ei[2] # See issues #9427, #1553375. Commented out for now. #if getattr(self, 'fullstack', False): # traceback.print_stack(tb.tb_frame.f_back, file=sio) traceback.print_exception(ei[0], ei[1], tb, limit=None, file=sio) s = sio.getvalue() sio.close() if s[-1:] == "\n": s = s[:-1] return s def usesTime(self): """ Check if the format uses the creation time of the record. """ return self._style.usesTime() def formatMessage(self, record): return self._style.format(record) def formatStack(self, stack_info): """ This method is provided as an extension point for specialized formatting of stack information. The input data is a string as returned from a call to :func:`traceback.print_stack`, but with the last trailing newline removed. The base implementation just returns the value passed in. """ return stack_info def format(self, record): """ Format the specified record as text. The record's attribute dictionary is used as the operand to a string formatting operation which yields the returned string. Before formatting the dictionary, a couple of preparatory steps are carried out. The message attribute of the record is computed using LogRecord.getMessage(). If the formatting string uses the time (as determined by a call to usesTime(), formatTime() is called to format the event time. If there is exception information, it is formatted using formatException() and appended to the message. """ record.message = record.getMessage() if self.usesTime(): record.asctime = self.formatTime(record, self.datefmt) s = self.formatMessage(record) if record.exc_info: # Cache the traceback text to avoid converting it multiple times # (it's constant anyway) if not record.exc_text: record.exc_text = self.formatException(record.exc_info) if record.exc_text: if s[-1:] != "\n": s = s + "\n" s = s + record.exc_text if record.stack_info: if s[-1:] != "\n": s = s + "\n" s = s + self.formatStack(record.stack_info) return s # # The default formatter to use when no other is specified # _defaultFormatter = Formatter() class BufferingFormatter(object): """ A formatter suitable for formatting a number of records. """ def __init__(self, linefmt=None): """ Optionally specify a formatter which will be used to format each individual record. """ if linefmt: self.linefmt = linefmt else: self.linefmt = _defaultFormatter def formatHeader(self, records): """ Return the header string for the specified records. """ return "" def formatFooter(self, records): """ Return the footer string for the specified records. """ return "" def format(self, records): """ Format the specified records and return the result as a string. """ rv = "" if len(records) > 0: rv = rv + self.formatHeader(records) for record in records: rv = rv + self.linefmt.format(record) rv = rv + self.formatFooter(records) return rv #--------------------------------------------------------------------------- # Filter classes and functions #--------------------------------------------------------------------------- class Filter(object): """ Filter instances are used to perform arbitrary filtering of LogRecords. Loggers and Handlers can optionally use Filter instances to filter records as desired. The base filter class only allows events which are below a certain point in the logger hierarchy. For example, a filter initialized with "A.B" will allow events logged by loggers "A.B", "A.B.C", "A.B.C.D", "A.B.D" etc. but not "A.BB", "B.A.B" etc. If initialized with the empty string, all events are passed. """ def __init__(self, name=''): """ Initialize a filter. Initialize with the name of the logger which, together with its children, will have its events allowed through the filter. If no name is specified, allow every event. """ self.name = name self.nlen = len(name) def __repr__(self): return '<%s (%s)>' % (self.__class__.__name__, self.name) def filter(self, record): """ Determine if the specified record is to be logged. Returns True if the record should be logged, or False otherwise. If deemed appropriate, the record may be modified in-place. """ if self.nlen == 0: return True elif self.name == record.name: return True elif record.name.find(self.name, 0, self.nlen) != 0: return False return (record.name[self.nlen] == ".") class Filterer(object): """ A base class for loggers and handlers which allows them to share common code. """ def __init__(self): """ Initialize the list of filters to be an empty list. """ self.filters = [] def addFilter(self, filter): """ Add the specified filter to this handler. """ if not (filter in self.filters): self.filters.append(filter) def removeFilter(self, filter): """ Remove the specified filter from this handler. """ if filter in self.filters: self.filters.remove(filter) def filter(self, record): """ Determine if a record is loggable by consulting all the filters. The default is to allow the record to be logged; any filter can veto this by returning a false value. If a filter attached to a handler returns a log record instance, then that instance is used in place of the original log record in any further processing of the event by that handler. If a filter returns any other true value, the original log record is used in any further processing of the event by that handler. If none of the filters return false values, this method returns a log record. If any of the filters return a false value, this method returns a false value. .. versionchanged:: 3.2 Allow filters to be just callables. .. versionchanged:: 3.12 Allow filters to return a LogRecord instead of modifying it in place. """ for f in self.filters: if hasattr(f, 'filter'): result = f.filter(record) else: result = f(record) # assume callable - will raise if not if not result: return False if isinstance(result, LogRecord): record = result return record #--------------------------------------------------------------------------- # Handler classes and functions #--------------------------------------------------------------------------- _handlers = weakref.WeakValueDictionary() #map of handler names to handlers _handlerList = [] # added to allow handlers to be removed in reverse of order initialized def _removeHandlerRef(wr): """ Remove a handler reference from the internal cleanup list. """ # This function can be called during module teardown, when globals are # set to None. It can also be called from another thread. So we need to # pre-emptively grab the necessary globals and check if they're None, # to prevent race conditions and failures during interpreter shutdown. handlers, lock = _handlerList, _lock if lock and handlers: with lock: try: handlers.remove(wr) except ValueError: pass def _addHandlerRef(handler): """ Add a handler to the internal cleanup list using a weak reference. """ with _lock: _handlerList.append(weakref.ref(handler, _removeHandlerRef)) def getHandlerByName(name): """ Get a handler with the specified *name*, or None if there isn't one with that name. """ return _handlers.get(name) def getHandlerNames(): """ Return all known handler names as an immutable set. """ return frozenset(_handlers) class Handler(Filterer): """ Handler instances dispatch logging events to specific destinations. The base handler class. Acts as a placeholder which defines the Handler interface. Handlers can optionally use Formatter instances to format records as desired. By default, no formatter is specified; in this case, the 'raw' message as determined by record.message is logged. """ def __init__(self, level=NOTSET): """ Initializes the instance - basically setting the formatter to None and the filter list to empty. """ Filterer.__init__(self) self._name = None self.level = _checkLevel(level) self.formatter = None self._closed = False # Add the handler to the global _handlerList (for cleanup on shutdown) _addHandlerRef(self) self.createLock() def get_name(self): return self._name def set_name(self, name): with _lock: if self._name in _handlers: del _handlers[self._name] self._name = name if name: _handlers[name] = self name = property(get_name, set_name) def createLock(self): """ Acquire a thread lock for serializing access to the underlying I/O. """ self.lock = threading.RLock() _register_at_fork_reinit_lock(self) def _at_fork_reinit(self): self.lock._at_fork_reinit() def acquire(self): """ Acquire the I/O thread lock. """ if self.lock: self.lock.acquire() def release(self): """ Release the I/O thread lock. """ if self.lock: self.lock.release() def setLevel(self, level): """ Set the logging level of this handler. level must be an int or a str. """ self.level = _checkLevel(level) def format(self, record): """ Format the specified record. If a formatter is set, use it. Otherwise, use the default formatter for the module. """ if self.formatter: fmt = self.formatter else: |
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