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GeezerVison is showing github.com — cpython/Lib/optparse.py at 2.7 · python/cpython Expand file tree/ Copy pathoptparse.pyMore file actions 1704 lines (1425 loc) · 59.8 KB / Copy pathoptparse.pyFile metadata and controls1704 lines (1425 loc) · 59.8 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 """A powerful, extensible, and easy-to-use option parser. By Greg Ward <[email protected]> Originally distributed as Optik. For support, use the [email protected] mailing list (http://lists.sourceforge.net/lists/listinfo/optik-users). Simple usage example: from optparse import OptionParser parser = OptionParser() parser.add_option("-f", "--file", dest="filename", help="write report to FILE", metavar="FILE") parser.add_option("-q", "--quiet", action="store_false", dest="verbose", default=True, help="don't print status messages to stdout") (options, args) = parser.parse_args() """ __version__ = "1.5.3" __all__ = ['Option', 'make_option', 'SUPPRESS_HELP', 'SUPPRESS_USAGE', 'Values', 'OptionContainer', 'OptionGroup', 'OptionParser', 'HelpFormatter', 'IndentedHelpFormatter', 'TitledHelpFormatter', 'OptParseError', 'OptionError', 'OptionConflictError', 'OptionValueError', 'BadOptionError'] __copyright__ = """ Copyright (c) 2001-2006 Gregory P. Ward. All rights reserved. Copyright (c) 2002-2006 Python Software Foundation. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the author nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. """ import sys, os import types import textwrap def _repr(self): return "<%s at 0x%x: %s>" % (self.__class__.__name__, id(self), self) # This file was generated from: # Id: option_parser.py 527 2006-07-23 15:21:30Z greg # Id: option.py 522 2006-06-11 16:22:03Z gward # Id: help.py 527 2006-07-23 15:21:30Z greg # Id: errors.py 509 2006-04-20 00:58:24Z gward try: from gettext import gettext except ImportError: def gettext(message): return message _ = gettext class OptParseError (Exception): def __init__(self, msg): self.msg = msg def __str__(self): return self.msg class OptionError (OptParseError): """ Raised if an Option instance is created with invalid or inconsistent arguments. """ def __init__(self, msg, option): self.msg = msg self.option_id = str(option) def __str__(self): if self.option_id: return "option %s: %s" % (self.option_id, self.msg) else: return self.msg class OptionConflictError (OptionError): """ Raised if conflicting options are added to an OptionParser. """ class OptionValueError (OptParseError): """ Raised if an invalid option value is encountered on the command line. """ class BadOptionError (OptParseError): """ Raised if an invalid option is seen on the command line. """ def __init__(self, opt_str): self.opt_str = opt_str def __str__(self): return _("no such option: %s") % self.opt_str class AmbiguousOptionError (BadOptionError): """ Raised if an ambiguous option is seen on the command line. """ def __init__(self, opt_str, possibilities): BadOptionError.__init__(self, opt_str) self.possibilities = possibilities def __str__(self): return (_("ambiguous option: %s (%s?)") % (self.opt_str, ", ".join(self.possibilities))) class HelpFormatter: """ Abstract base class for formatting option help. OptionParser instances should use one of the HelpFormatter subclasses for formatting help; by default IndentedHelpFormatter is used. Instance attributes: parser : OptionParser the controlling OptionParser instance indent_increment : int the number of columns to indent per nesting level max_help_position : int the maximum starting column for option help text help_position : int the calculated starting column for option help text; initially the same as the maximum width : int total number of columns for output (pass None to constructor for this value to be taken from the $COLUMNS environment variable) level : int current indentation level current_indent : int current indentation level (in columns) help_width : int number of columns available for option help text (calculated) default_tag : str text to replace with each option's default value, "%default" by default. Set to false value to disable default value expansion. option_strings : { Option : str } maps Option instances to the snippet of help text explaining the syntax of that option, e.g. "-h, --help" or "-fFILE, --file=FILE" _short_opt_fmt : str format string controlling how short options with values are printed in help text. Must be either "%s%s" ("-fFILE") or "%s %s" ("-f FILE"), because those are the two syntaxes that Optik supports. _long_opt_fmt : str similar but for long options; must be either "%s %s" ("--file FILE") or "%s=%s" ("--file=FILE"). """ NO_DEFAULT_VALUE = "none" def __init__(self, indent_increment, max_help_position, width, short_first): self.parser = None self.indent_increment = indent_increment if width is None: try: width = int(os.environ['COLUMNS']) except (KeyError, ValueError): width = 80 width -= 2 self.width = width self.help_position = self.max_help_position = \ min(max_help_position, max(width - 20, indent_increment * 2)) self.current_indent = 0 self.level = 0 self.help_width = None # computed later self.short_first = short_first self.default_tag = "%default" self.option_strings = {} self._short_opt_fmt = "%s %s" self._long_opt_fmt = "%s=%s" def set_parser(self, parser): self.parser = parser def set_short_opt_delimiter(self, delim): if delim not in ("", " "): raise ValueError( "invalid metavar delimiter for short options: %r" % delim) self._short_opt_fmt = "%s" + delim + "%s" def set_long_opt_delimiter(self, delim): if delim not in ("=", " "): raise ValueError( "invalid metavar delimiter for long options: %r" % delim) self._long_opt_fmt = "%s" + delim + "%s" def indent(self): self.current_indent += self.indent_increment self.level += 1 def dedent(self): self.current_indent -= self.indent_increment assert self.current_indent >= 0, "Indent decreased below 0." self.level -= 1 def format_usage(self, usage): raise NotImplementedError, "subclasses must implement" def format_heading(self, heading): raise NotImplementedError, "subclasses must implement" def _format_text(self, text): """ Format a paragraph of free-form text for inclusion in the help output at the current indentation level. """ text_width = max(self.width - self.current_indent, 11) indent = " "*self.current_indent return textwrap.fill(text, text_width, initial_indent=indent, subsequent_indent=indent) def format_description(self, description): if description: return self._format_text(description) + "\n" else: return "" def format_epilog(self, epilog): if epilog: return "\n" + self._format_text(epilog) + "\n" else: return "" def expand_default(self, option): if self.parser is None or not self.default_tag: return option.help default_value = self.parser.defaults.get(option.dest) if default_value is NO_DEFAULT or default_value is None: default_value = self.NO_DEFAULT_VALUE return option.help.replace(self.default_tag, str(default_value)) def format_option(self, option): # The help for each option consists of two parts: # * the opt strings and metavars # eg. ("-x", or "-fFILENAME, --file=FILENAME") # * the user-supplied help string # eg. ("turn on expert mode", "read data from FILENAME") # # If possible, we write both of these on the same line: # -x turn on expert mode # # But if the opt string list is too long, we put the help # string on a second line, indented to the same column it would # start in if it fit on the first line. # -fFILENAME, --file=FILENAME # read data from FILENAME result = [] opts = self.option_strings[option] opt_width = self.help_position - self.current_indent - 2 if len(opts) > opt_width: opts = "%*s%s\n" % (self.current_indent, "", opts) indent_first = self.help_position else: # start help on same line as opts opts = "%*s%-*s " % (self.current_indent, "", opt_width, opts) indent_first = 0 result.append(opts) if option.help: help_text = self.expand_default(option) help_lines = textwrap.wrap(help_text, self.help_width) result.append("%*s%s\n" % (indent_first, "", help_lines[0])) result.extend(["%*s%s\n" % (self.help_position, "", line) for line in help_lines[1:]]) elif opts[-1] != "\n": result.append("\n") return "".join(result) def store_option_strings(self, parser): self.indent() max_len = 0 for opt in parser.option_list: strings = self.format_option_strings(opt) self.option_strings[opt] = strings max_len = max(max_len, len(strings) + self.current_indent) self.indent() for group in parser.option_groups: for opt in group.option_list: strings = self.format_option_strings(opt) self.option_strings[opt] = strings max_len = max(max_len, len(strings) + self.current_indent) self.dedent() self.dedent() self.help_position = min(max_len + 2, self.max_help_position) self.help_width = max(self.width - self.help_position, 11) def format_option_strings(self, option): """Return a comma-separated list of option strings & metavariables.""" if option.takes_value(): metavar = option.metavar or option.dest.upper() short_opts = [self._short_opt_fmt % (sopt, metavar) for sopt in option._short_opts] long_opts = [self._long_opt_fmt % (lopt, metavar) for lopt in option._long_opts] else: short_opts = option._short_opts long_opts = option._long_opts if self.short_first: opts = short_opts + long_opts else: opts = long_opts + short_opts return ", ".join(opts) class IndentedHelpFormatter (HelpFormatter): """Format help with indented section bodies. """ def __init__(self, indent_increment=2, max_help_position=24, width=None, short_first=1): HelpFormatter.__init__( self, indent_increment, max_help_position, width, short_first) def format_usage(self, usage): return _("Usage: %s\n") % usage def format_heading(self, heading): return "%*s%s:\n" % (self.current_indent, "", heading) class TitledHelpFormatter (HelpFormatter): """Format help with underlined section headers. """ def __init__(self, indent_increment=0, max_help_position=24, width=None, short_first=0): HelpFormatter.__init__ ( self, indent_increment, max_help_position, width, short_first) def format_usage(self, usage): return "%s %s\n" % (self.format_heading(_("Usage")), usage) def format_heading(self, heading): return "%s\n%s\n" % (heading, "=-"[self.level] * len(heading)) def _parse_num(val, type): if val[:2].lower() == "0x": # hexadecimal radix = 16 elif val[:2].lower() == "0b": # binary radix = 2 val = val[2:] or "0" # have to remove "0b" prefix elif val[:1] == "0": # octal radix = 8 else: # decimal radix = 10 return type(val, radix) def _parse_int(val): return _parse_num(val, int) def _parse_long(val): return _parse_num(val, long) _builtin_cvt = { "int" : (_parse_int, _("integer")), "long" : (_parse_long, _("long integer")), "float" : (float, _("floating-point")), "complex" : (complex, _("complex")) } def check_builtin(option, opt, value): (cvt, what) = _builtin_cvt[option.type] try: return cvt(value) except ValueError: raise OptionValueError( _("option %s: invalid %s value: %r") % (opt, what, value)) def check_choice(option, opt, value): if value in option.choices: return value else: choices = ", ".join(map(repr, option.choices)) raise OptionValueError( _("option %s: invalid choice: %r (choose from %s)") % (opt, value, choices)) # Not supplying a default is different from a default of None, # so we need an explicit "not supplied" value. NO_DEFAULT = ("NO", "DEFAULT") class Option: """ Instance attributes: _short_opts : [string] _long_opts : [string] action : string type : string dest : string default : any nargs : int const : any choices : [string] callback : function callback_args : (any*) callback_kwargs : { string : any } help : string metavar : string """ # The list of instance attributes that may be set through # keyword args to the constructor. ATTRS = ['action', 'type', 'dest', 'default', 'nargs', 'const', 'choices', 'callback', 'callback_args', 'callback_kwargs', 'help', 'metavar'] # The set of actions allowed by option parsers. Explicitly listed # here so the constructor can validate its arguments. ACTIONS = ("store", "store_const", "store_true", "store_false", "append", "append_const", "count", "callback", "help", "version") # The set of actions that involve storing a value somewhere; # also listed just for constructor argument validation. (If # the action is one of these, there must be a destination.) STORE_ACTIONS = ("store", "store_const", "store_true", "store_false", "append", "append_const", "count") # The set of actions for which it makes sense to supply a value # type, ie. which may consume an argument from the command line. TYPED_ACTIONS = ("store", "append", "callback") # The set of actions which *require* a value type, ie. that # always consume an argument from the command line. ALWAYS_TYPED_ACTIONS = ("store", "append") # The set of actions which take a 'const' attribute. CONST_ACTIONS = ("store_const", "append_const") # The set of known types for option parsers. Again, listed here for # constructor argument validation. TYPES = ("string", "int", "long", "float", "complex", "choice") # Dictionary of argument checking functions, which convert and # validate option arguments according to the option type. # # Signature of checking functions is: # check(option : Option, opt : string, value : string) -> any # where # option is the Option instance calling the checker # opt is the actual option seen on the command-line # (eg. "-a", "--file") # value is the option argument seen on the command-line # # The return value should be in the appropriate Python type # for option.type -- eg. an integer if option.type == "int". # # If no checker is defined for a type, arguments will be # unchecked and remain strings. TYPE_CHECKER = { "int" : check_builtin, "long" : check_builtin, "float" : check_builtin, "complex": check_builtin, "choice" : check_choice, } # CHECK_METHODS is a list of unbound method objects; they are called # by the constructor, in order, after all attributes are # initialized. The list is created and filled in later, after all # the methods are actually defined. (I just put it here because I # like to define and document all class attributes in the same # place.) Subclasses that add another _check_*() method should # define their own CHECK_METHODS list that adds their check method # to those from this class. CHECK_METHODS = None # -- Constructor/initialization methods ---------------------------- def __init__(self, *opts, **attrs): # Set _short_opts, _long_opts attrs from 'opts' tuple. # Have to be set now, in case no option strings are supplied. self._short_opts = [] self._long_opts = [] opts = self._check_opt_strings(opts) self._set_opt_strings(opts) # Set all other attrs (action, type, etc.) from 'attrs' dict self._set_attrs(attrs) # Check all the attributes we just set. There are lots of # complicated interdependencies, but luckily they can be farmed # out to the _check_*() methods listed in CHECK_METHODS -- which # could be handy for subclasses! The one thing these all share # is that they raise OptionError if they discover a problem. for checker in self.CHECK_METHODS: checker(self) def _check_opt_strings(self, opts): # Filter out None because early versions of Optik had exactly # one short option and one long option, either of which # could be None. opts = filter(None, opts) if not opts: raise TypeError("at least one option string must be supplied") return opts def _set_opt_strings(self, opts): for opt in opts: if len(opt) < 2: raise OptionError( "invalid option string %r: " "must be at least two characters long" % opt, self) elif len(opt) == 2: if not (opt[0] == "-" and opt[1] != "-"): raise OptionError( "invalid short option string %r: " "must be of the form -x, (x any non-dash char)" % opt, self) self._short_opts.append(opt) else: if not (opt[0:2] == "--" and opt[2] != "-"): raise OptionError( "invalid long option string %r: " "must start with --, followed by non-dash" % opt, self) self._long_opts.append(opt) def _set_attrs(self, attrs): for attr in self.ATTRS: if attr in attrs: setattr(self, attr, attrs[attr]) del attrs[attr] else: if attr == 'default': setattr(self, attr, NO_DEFAULT) else: setattr(self, attr, None) if attrs: attrs = attrs.keys() attrs.sort() raise OptionError( "invalid keyword arguments: %s" % ", ".join(attrs), self) # -- Constructor validation methods -------------------------------- def _check_action(self): if self.action is None: self.action = "store" elif self.action not in self.ACTIONS: raise OptionError("invalid action: %r" % self.action, self) def _check_type(self): if self.type is None: if self.action in self.ALWAYS_TYPED_ACTIONS: if self.choices is not None: # The "choices" attribute implies "choice" type. self.type = "choice" else: # No type given? "string" is the most sensible default. self.type = "string" else: # Allow type objects or builtin type conversion functions # (int, str, etc.) as an alternative to their names. (The # complicated check of __builtin__ is only necessary for # Python 2.1 and earlier, and is short-circuited by the # first check on modern Pythons.) import __builtin__ if ( type(self.type) is types.TypeType or (hasattr(self.type, "__name__") and getattr(__builtin__, self.type.__name__, None) is self.type) ): self.type = self.type.__name__ if self.type == "str": self.type = "string" if self.type not in self.TYPES: raise OptionError("invalid option type: %r" % self.type, self) if self.action not in self.TYPED_ACTIONS: raise OptionError( "must not supply a type for action %r" % self.action, self) def _check_choice(self): if self.type == "choice": if self.choices is None: raise OptionError( "must supply a list of choices for type 'choice'", self) elif type(self.choices) not in (types.TupleType, types.ListType): raise OptionError( "choices must be a list of strings ('%s' supplied)" % str(type(self.choices)).split("'")[1], self) elif self.choices is not None: raise OptionError( "must not supply choices for type %r" % self.type, self) def _check_dest(self): # No destination given, and we need one for this action. The # self.type check is for callbacks that take a value. takes_value = (self.action in self.STORE_ACTIONS or self.type is not None) if self.dest is None and takes_value: # Glean a destination from the first long option string, # or from the first short option string if no long options. if self._long_opts: # eg. "--foo-bar" -> "foo_bar" self.dest = self._long_opts[0][2:].replace('-', '_') else: self.dest = self._short_opts[0][1] def _check_const(self): if self.action not in self.CONST_ACTIONS and self.const is not None: raise OptionError( "'const' must not be supplied for action %r" % self.action, self) def _check_nargs(self): if self.action in self.TYPED_ACTIONS: if self.nargs is None: self.nargs = 1 elif self.nargs is not None: raise OptionError( "'nargs' must not be supplied for action %r" % self.action, self) def _check_callback(self): if self.action == "callback": if not hasattr(self.callback, '__call__'): raise OptionError( "callback not callable: %r" % self.callback, self) if (self.callback_args is not None and type(self.callback_args) is not types.TupleType): raise OptionError( "callback_args, if supplied, must be a tuple: not %r" % self.callback_args, self) if (self.callback_kwargs is not None and type(self.callback_kwargs) is not types.DictType): raise OptionError( "callback_kwargs, if supplied, must be a dict: not %r" % self.callback_kwargs, self) else: if self.callback is not None: raise OptionError( "callback supplied (%r) for non-callback option" % self.callback, self) if self.callback_args is not None: raise OptionError( "callback_args supplied for non-callback option", self) if self.callback_kwargs is not None: raise OptionError( "callback_kwargs supplied for non-callback option", self) CHECK_METHODS = [_check_action, _check_type, _check_choice, _check_dest, _check_const, _check_nargs, _check_callback] # -- Miscellaneous methods ----------------------------------------- def __str__(self): return "/".join(self._short_opts + self._long_opts) __repr__ = _repr def takes_value(self): return self.type is not None def get_opt_string(self): if self._long_opts: return self._long_opts[0] else: return self._short_opts[0] # -- Processing methods -------------------------------------------- def check_value(self, opt, value): checker = self.TYPE_CHECKER.get(self.type) if checker is None: return value else: return checker(self, opt, value) def convert_value(self, opt, value): if value is not None: if self.nargs == 1: return self.check_value(opt, value) else: return tuple([self.check_value(opt, v) for v in value]) def process(self, opt, value, values, parser): # First, convert the value(s) to the right type. Howl if any # value(s) are bogus. value = self.convert_value(opt, value) # And then take whatever action is expected of us. # This is a separate method to make life easier for # subclasses to add new actions. return self.take_action( self.action, self.dest, opt, value, values, parser) def take_action(self, action, dest, opt, value, values, parser): if action == "store": setattr(values, dest, value) elif action == "store_const": setattr(values, dest, self.const) elif action == "store_true": setattr(values, dest, True) elif action == "store_false": setattr(values, dest, False) elif action == "append": values.ensure_value(dest, []).append(value) elif action == "append_const": values.ensure_value(dest, []).append(self.const) elif action == "count": setattr(values, dest, values.ensure_value(dest, 0) + 1) elif action == "callback": args = self.callback_args or () kwargs = self.callback_kwargs or {} self.callback(self, opt, value, parser, *args, **kwargs) elif action == "help": parser.print_help() parser.exit() elif action == "version": parser.print_version() parser.exit() else: raise ValueError("unknown action %r" % self.action) return 1 # class Option SUPPRESS_HELP = "SUPPRESS"+"HELP" SUPPRESS_USAGE = "SUPPRESS"+"USAGE" try: basestring except NameError: def isbasestring(x): return isinstance(x, (types.StringType, types.UnicodeType)) else: def isbasestring(x): return isinstance(x, basestring) class Values: def __init__(self, defaults=None): if defaults: for (attr, val) in defaults.items(): setattr(self, attr, val) def __str__(self): return str(self.__dict__) __repr__ = _repr def __cmp__(self, other): if isinstance(other, Values): return cmp(self.__dict__, other.__dict__) elif isinstance(other, types.DictType): return cmp(self.__dict__, other) else: return -1 def _update_careful(self, dict): """ Update the option values from an arbitrary dictionary, but only use keys from dict that already have a corresponding attribute in self. Any keys in dict without a corresponding attribute are silently ignored. """ for attr in dir(self): if attr in dict: dval = dict[attr] if dval is not None: setattr(self, attr, dval) def _update_loose(self, dict): """ Update the option values from an arbitrary dictionary, using all keys from the dictionary regardless of whether they have a corresponding attribute in self or not. """ self.__dict__.update(dict) def _update(self, dict, mode): if mode == "careful": self._update_careful(dict) elif mode == "loose": self._update_loose(dict) else: raise ValueError, "invalid update mode: %r" % mode def read_module(self, modname, mode="careful"): __import__(modname) mod = sys.modules[modname] self._update(vars(mod), mode) def read_file(self, filename, mode="careful"): vars = {} execfile(filename, vars) self._update(vars, mode) def ensure_value(self, attr, value): if not hasattr(self, attr) or getattr(self, attr) is None: setattr(self, attr, value) return getattr(self, attr) class OptionContainer: """ Abstract base class. Class attributes: standard_option_list : [Option] list of standard options that will be accepted by all instances of this parser class (intended to be overridden by subclasses). Instance attributes: option_list : [Option] the list of Option objects contained by this OptionContainer _short_opt : { string : Option } dictionary mapping short option strings, eg. "-f" or "-X", to the Option instances that implement them. If an Option has multiple short option strings, it will appear in this dictionary multiple times. [1] _long_opt : { string : Option } dictionary mapping long option strings, eg. "--file" or "--exclude", to the Option instances that implement them. Again, a given Option can occur multiple times in this dictionary. [1] defaults : { string : any } dictionary mapping option destination names to default values for each destination [1] [1] These mappings are common to (shared by) all components of the controlling OptionParser, where they are initially created. """ def __init__(self, option_class, conflict_handler, description): # Initialize the option list and related data structures. # This method must be provided by subclasses, and it must # initialize at least the following instance attributes: # option_list, _short_opt, _long_opt, defaults. self._create_option_list() self.option_class = option_class self.set_conflict_handler(conflict_handler) self.set_description(description) def _create_option_mappings(self): # For use by OptionParser constructor -- create the master # option mappings used by this OptionParser and all # OptionGroups that it owns. self._short_opt = {} # single letter -> Option instance self._long_opt = {} # long option -> Option instance self.defaults = {} # maps option dest -> default value def _share_option_mappings(self, parser): # For use by OptionGroup constructor -- use shared option # mappings from the OptionParser that owns this OptionGroup. self._short_opt = parser._short_opt self._long_opt = parser._long_opt self.defaults = parser.defaults def set_conflict_handler(self, handler): if handler not in ("error", "resolve"): raise ValueError, "invalid conflict_resolution value %r" % handler self.conflict_handler = handler def set_description(self, description): self.description = description def get_description(self): return self.description def destroy(self): """see OptionParser.destroy().""" del self._short_opt del self._long_opt del self.defaults # -- Option-adding methods ----------------------------------------- def _check_conflict(self, option): conflict_opts = [] for opt in option._short_opts: if opt in self._short_opt: conflict_opts.append((opt, self._short_opt[opt])) for opt in option._long_opts: if opt in self._long_opt: conflict_opts.append((opt, self._long_opt[opt])) if conflict_opts: handler = self.conflict_handler if handler == "error": raise OptionConflictError( "conflicting option string(s): %s" % ", ".join([co[0] for co in conflict_opts]), option) elif handler == "resolve": for (opt, c_option) in conflict_opts: if opt.startswith("--"): c_option._long_opts.remove(opt) |
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