-
-
Notifications
You must be signed in to change notification settings - Fork 31.7k
/
Copy pathoptparse.py
1686 lines (1408 loc) · 59.3 KB
/
optparse.py
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 <gward@python.net>
Originally distributed as Optik.
For support, use the optik-users@lists.sourceforge.net 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 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, ngettext
except ImportError:
def gettext(message):
return message
def ngettext(singular, plural, n):
if n == 1:
return singular
return plural
_ = 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)
_builtin_cvt = { "int" : (_parse_int, _("integer")),
"long" : (_parse_int, _("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 = [opt for opt in opts if opt]
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 = sorted(attrs.keys())
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 builtins is only necessary for
# Python 2.1 and earlier, and is short-circuited by the
# first check on modern Pythons.)
import builtins
if ( isinstance(self.type, type) or
(hasattr(self.type, "__name__") and
getattr(builtins, 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 not isinstance(self.choices, (tuple, list)):
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 callable(self.callback):
raise OptionError(
"callback not callable: %r" % self.callback, self)
if (self.callback_args is not None and
not isinstance(self.callback_args, tuple)):
raise OptionError(
"callback_args, if supplied, must be a tuple: not %r"
% self.callback_args, self)
if (self.callback_kwargs is not None and
not isinstance(self.callback_kwargs, dict)):
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"
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 __eq__(self, other):
if isinstance(other, Values):
return self.__dict__ == other.__dict__
elif isinstance(other, dict):
return self.__dict__ == other
else:
return NotImplemented
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 = {}
exec(open(filename).read(), 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 appears 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)
del self._long_opt[opt]
else:
c_option._short_opts.remove(opt)
del self._short_opt[opt]
if not (c_option._short_opts or c_option._long_opts):
c_option.container.option_list.remove(c_option)
def add_option(self, *args, **kwargs):