This file is indexed.

/usr/lib/python3/dist-packages/apt/package.py is in python3-apt 1.1.0~beta1build1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

   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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
# package.py - apt package abstraction
#
#  Copyright (c) 2005-2009 Canonical
#
#  Author: Michael Vogt <michael.vogt@ubuntu.com>
#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License as
#  published by the Free Software Foundation; either version 2 of the
#  License, or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
#  USA
"""Functionality related to packages."""
from __future__ import print_function


import os
import sys
import re
import socket
import subprocess

try:
    from http.client import BadStatusLine
    from urllib.error import HTTPError
    from urllib.request import urlopen
except ImportError:
    from httplib import BadStatusLine
    from urllib2 import HTTPError, urlopen

from collections import Mapping, Sequence

import apt_pkg
import apt.progress.text
from apt_pkg import gettext as _

__all__ = ('BaseDependency', 'Dependency', 'Origin', 'Package', 'Record',
           'Version', 'VersionList')

if sys.version_info.major >= 3:
    unicode = str


def _file_is_same(path, size, md5):
    """Return ``True`` if the file is the same."""
    if os.path.exists(path) and os.path.getsize(path) == size:
        with open(path) as fobj:
            return apt_pkg.md5sum(fobj) == md5


class FetchError(Exception):
    """Raised when a file could not be fetched."""


class BaseDependency(object):
    """A single dependency."""

    class __dstr(str):
        """Compare helper for compatibility with old third-party code.

        Old third-party code might still compare the relation with the
        previously used relations (<<,<=,==,!=,>=,>>,) instead of the curently
        used ones (<,<=,=,!=,>=,>,). This compare helper lets < match to <<,
        > match to >> and = match to ==.
        """

        def __eq__(self, other):
            if str.__eq__(self, other):
                return True
            elif str.__eq__(self, '<'):
                return str.__eq__('<<', other)
            elif str.__eq__(self, '>'):
                return str.__eq__('>>', other)
            elif str.__eq__(self, '='):
                return str.__eq__('==', other)
            else:
                return False

        def __ne__(self, other):
            return not self.__eq__(other)

    def __init__(self, version, dep):
        self._version = version  # apt.package.Version
        self._dep = dep  # apt_pkg.Dependency

    def __str__(self):
        return '%s: %s' % (self.rawtype, self.rawstr)

    def __repr__(self):
        return ('<BaseDependency: name:%r relation:%r version:%r rawtype:%r>'
                % (self.name, self.relation, self.version, self.rawtype))

    @property
    def name(self):
        """The name of the target package."""
        return self._dep.target_pkg.name

    @property
    def relation(self):
        """The relation (<, <=, =, !=, >=, >, '') in mathematical notation.

        The empty string will be returned in case of an unversioned dependency.
        """
        return self.__dstr(self._dep.comp_type)

    @property
    def relation_deb(self):
        """The relation (<<, <=, =, !=, >=, >>, '') in Debian notation.

        The empty string will be returned in case of an unversioned dependency.
        For more details see the Debian Policy Manual on the syntax of
        relationship fields:
        https://www.debian.org/doc/debian-policy/ch-relationships.html#s-depsyntax  # noqa

        .. versionadded:: 1.0.0
        """
        return self._dep.comp_type_deb

    @property
    def version(self):
        """The target version or an empty string.

        Note that the version is only an empty string in case of an unversioned
        dependency. In this case the relation is also an empty string.
        """
        return self._dep.target_ver

    @property
    def target_versions(self):
        """A list of all Version objects which satisfy this dependency.

        .. versionadded:: 1.0.0
        """
        tvers = []
        _tvers = self._dep.all_targets()  # [apt_pkg.Version, ...]
        for _tver in _tvers:  # apt_pkg.Version
            _pkg = _tver.parent_pkg  # apt_pkg.Package
            cache = self._version.package._pcache  # apt.cache.Cache
            pkg = cache._rawpkg_to_pkg(_pkg)  # apt.package.Package
            tver = Version(pkg, _tver)  # apt.package.Version
            tvers.append(tver)
        return tvers

    @property
    def installed_target_versions(self):
        """A list of all installed Version objects which satisfy this dep.

        .. versionadded:: 1.0.0
        """
        return [tver for tver in self.target_versions if tver.is_installed]

    @property
    def rawstr(self):
        """String represenation of the dependency.

        Returns the string representation of the dependency as it would be
        written in the debian/control file.  The string representation does not
        include the type of the dependency.

        Example for an unversioned dependency:
          python3

        Example for a versioned dependency:
          python3 >= 3.2

        .. versionadded:: 1.0.0
        """
        if self.version:
            return '%s %s %s' % (self.name, self.relation_deb, self.version)
        else:
            return self.name

    @property
    def rawtype(self):
        """Type of the dependency.

        This should be one of 'Breaks', 'Conflicts', 'Depends', 'Enhances',
        'PreDepends', 'Recommends', 'Replaces', 'Suggests'.

        Additional types might be added in the future.
        """
        return self._dep.dep_type_untranslated

    @property
    def pre_depend(self):
        """Whether this is a PreDepends."""
        return self._dep.dep_type_untranslated == 'PreDepends'


class Dependency(list):
    """Represent an Or-group of dependencies.

    Attributes defined here:
        or_dependencies - The possible choices
        rawstr - String represenation of the Or-group of dependencies
        rawtype - The type of the dependencies in the Or-group
        target_version - A list of Versions which satisfy this Or-group of deps
    """

    def __init__(self, version, base_deps, rawtype):
        super(Dependency, self).__init__(base_deps)
        self._version = version  # apt.package.Version
        self._rawtype = rawtype

    def __str__(self):
        return '%s: %s' % (self.rawtype, self.rawstr)

    def __repr__(self):
        return '<Dependency: [%s]>' % (', '.join(repr(bd) for bd in self))

    @property
    def or_dependencies(self):
        return self

    @property
    def rawstr(self):
        """String represenation of the Or-group of dependencies.

        Returns the string representation of the Or-group of dependencies as it
        would be written in the debian/control file.  The string representation
        does not include the type of the Or-group of dependencies.

        Example:
          python2 >= 2.7 | python3

        .. versionadded:: 1.0.0
        """
        return ' | '.join(bd.rawstr for bd in self)

    @property
    def rawtype(self):
        """Type of the Or-group of dependency.

        This should be one of 'Breaks', 'Conflicts', 'Depends', 'Enhances',
        'PreDepends', 'Recommends', 'Replaces', 'Suggests'.

        Additional types might be added in the future.

        .. versionadded:: 1.0.0
        """
        return self._rawtype

    @property
    def target_versions(self):
        """A list of all Version objects which satisfy this Or-group of deps.

        .. versionadded:: 1.0.0
        """
        tvers = []
        for bd in self:  # apt.package.Dependency
            for tver in bd.target_versions:  # apt.package.Version
                if tver not in tvers:
                    tvers.append(tver)
        return tvers

    @property
    def installed_target_versions(self):
        """A list of all installed Version objects which satisfy this dep.

        .. versionadded:: 1.0.0
        """
        return [tver for tver in self.target_versions if tver.is_installed]


class Origin(object):
    """The origin of a version.

    Attributes defined here:
        archive   - The archive (eg. unstable)
        component - The component (eg. main)
        label     - The Label, as set in the Release file
        origin    - The Origin, as set in the Release file
        codename  - The Codename, as set in the Release file
        site      - The hostname of the site.
        trusted   - Boolean value whether this is trustworthy.
    """

    def __init__(self, pkg, packagefile):
        self.archive = packagefile.archive
        self.component = packagefile.component
        self.label = packagefile.label
        self.origin = packagefile.origin
        self.codename = packagefile.codename
        self.site = packagefile.site
        self.not_automatic = packagefile.not_automatic
        # check the trust
        indexfile = pkg._pcache._list.find_index(packagefile)
        if indexfile and indexfile.is_trusted:
            self.trusted = True
        else:
            self.trusted = False

    def __repr__(self):
        return ("<Origin component:%r archive:%r origin:%r label:%r "
                "site:%r isTrusted:%r>") % (self.component, self.archive,
                                            self.origin, self.label,
                                            self.site, self.trusted)


class Record(Mapping):
    """Record in a Packages file

    Represent a record as stored in a Packages file. You can use this like
    a dictionary mapping the field names of the record to their values::

        >>> record = Record("Package: python-apt\\nVersion: 0.8.0\\n\\n")
        >>> record["Package"]
        'python-apt'
        >>> record["Version"]
        '0.8.0'

    For example, to get the tasks of a package from a cache, you could do::

        package.candidate.record["Tasks"].split()

    Of course, you can also use the :attr:`Version.tasks` property.

    """

    def __init__(self, record_str):
        self._rec = apt_pkg.TagSection(record_str)

    def __hash__(self):
        return hash(self._rec)

    def __str__(self):
        return str(self._rec)

    def __getitem__(self, key):
        return self._rec[key]

    def __contains__(self, key):
        return key in self._rec

    def __iter__(self):
        return iter(self._rec.keys())

    def iteritems(self):
        """An iterator over the (key, value) items of the record."""
        for key in self._rec.keys():
            yield key, self._rec[key]

    def get(self, key, default=None):
        """Return record[key] if key in record, else *default*.

        The parameter *default* must be either a string or None.
        """
        return self._rec.get(key, default)

    def has_key(self, key):
        """deprecated form of ``key in x``."""
        return key in self._rec

    def __len__(self):
        return len(self._rec)


class Version(object):
    """Representation of a package version.

    The Version class contains all information related to a
    specific package version.

    .. versionadded:: 0.7.9
    """

    def __init__(self, package, cand):
        self.package = package
        self._cand = cand

    def _cmp(self, other):
        """Compares against another apt.Version object or a version string.

        This method behaves like Python 2's cmp builtin and returns an integer
        according to the outcome.  The return value is negative in case of
        self < other, zero if self == other and positive if self > other.

        The comparison includes the package name and architecture if other is
        an apt.Version object.  If other isn't an apt.Version object it'll be
        assumed that other is a version string (without package name/arch).

        .. versionchanged:: 1.0.0
        """
        # Assume that other is an apt.Version object.
        try:
            self_name = self.package.fullname
            other_name = other.package.fullname
            if self_name < other_name:
                return -1
            elif self_name > other_name:
                return 1
            return apt_pkg.version_compare(self._cand.ver_str, other.version)
        except AttributeError:
            # Assume that other is a string that only contains the version.
            try:
                return apt_pkg.version_compare(self._cand.ver_str, other)
            except TypeError:
                return NotImplemented

    def __eq__(self, other):
        return self._cmp(other) == 0

    def __ge__(self, other):
        return self._cmp(other) >= 0

    def __gt__(self, other):
        return self._cmp(other) > 0

    def __le__(self, other):
        return self._cmp(other) <= 0

    def __lt__(self, other):
        return self._cmp(other) < 0

    def __ne__(self, other):
        try:
            return self._cmp(other) != 0
        except TypeError:
            return NotImplemented

    def __hash__(self):
        return self._cand.hash

    def __str__(self):
        return '%s=%s' % (self.package.name, self.version)

    def __repr__(self):
        return '<Version: package:%r version:%r>' % (self.package.name,
                                                     self.version)

    @property
    def _records(self):
        """Internal helper that moves the Records to the right position."""
        if self.package._pcache._records.lookup(self._cand.file_list[0]):
            return self.package._pcache._records

    @property
    def _translated_records(self):
        """Internal helper to get the translated description."""
        desc_iter = self._cand.translated_description
        self.package._pcache._records.lookup(desc_iter.file_list.pop(0))
        return self.package._pcache._records

    @property
    def installed_size(self):
        """Return the size of the package when installed."""
        return self._cand.installed_size

    @property
    def homepage(self):
        """Return the homepage for the package."""
        return self._records.homepage

    @property
    def size(self):
        """Return the size of the package."""
        return self._cand.size

    @property
    def architecture(self):
        """Return the architecture of the package version."""
        return self._cand.arch

    @property
    def downloadable(self):
        """Return whether the version of the package is downloadable."""
        return bool(self._cand.downloadable)

    @property
    def is_installed(self):
        """Return wether this version of the package is currently installed.

        .. versionadded:: 1.0.0
        """
        inst_ver = self.package.installed
        return inst_ver and inst_ver._cand.id == self._cand.id

    @property
    def version(self):
        """Return the version as a string."""
        return self._cand.ver_str

    @property
    def summary(self):
        """Return the short description (one line summary)."""
        return self._translated_records.short_desc

    @property
    def raw_description(self):
        """return the long description (raw)."""
        return self._records.long_desc

    @property
    def section(self):
        """Return the section of the package."""
        return self._cand.section

    @property
    def description(self):
        """Return the formatted long description.

        Return the formatted long description according to the Debian policy
        (Chapter 5.6.13).
        See http://www.debian.org/doc/debian-policy/ch-controlfields.html
        for more information.
        """
        desc = ''
        dsc = self._translated_records.long_desc
        try:
            if not isinstance(dsc, unicode):
                # Only convert where needed (i.e. Python 2.X)
                dsc = dsc.decode("utf-8")
        except UnicodeDecodeError as err:
            return _("Invalid unicode in description for '%s' (%s). "
                     "Please report.") % (self.package.name, err)

        lines = iter(dsc.split("\n"))
        # Skip the first line, since its a duplication of the summary
        next(lines)
        for raw_line in lines:
            if raw_line.strip() == ".":
                # The line is just line break
                if not desc.endswith("\n"):
                    desc += "\n\n"
                continue
            if raw_line.startswith("  "):
                # The line should be displayed verbatim without word wrapping
                if not desc.endswith("\n"):
                    line = "\n%s\n" % raw_line[2:]
                else:
                    line = "%s\n" % raw_line[2:]
            elif raw_line.startswith(" "):
                # The line is part of a paragraph.
                if desc.endswith("\n") or desc == "":
                    # Skip the leading white space
                    line = raw_line[1:]
                else:
                    line = raw_line
            else:
                line = raw_line
            # Add current line to the description
            desc += line
        return desc

    @property
    def source_name(self):
        """Return the name of the source package."""
        try:
            return self._records.source_pkg or self.package.shortname
        except IndexError:
            return self.package.shortname

    @property
    def source_version(self):
        """Return the version of the source package."""
        try:
            return self._records.source_ver or self._cand.ver_str
        except IndexError:
            return self._cand.ver_str

    @property
    def priority(self):
        """Return the priority of the package, as string."""
        return self._cand.priority_str

    @property
    def policy_priority(self):
        """Return the internal policy priority as a number.
           See apt_preferences(5) for more information about what it means.
        """
        priority = 0
        policy = self.package._pcache._depcache.policy
        for (packagefile, _unused) in self._cand.file_list:
            priority = max(priority, policy.get_priority(packagefile))
        return priority

    @property
    def record(self):
        """Return a Record() object for this version.

        Return a Record() object for this version which provides access
        to the raw attributes of the candidate version
        """
        return Record(self._records.record)

    def get_dependencies(self, *types):
        """Return a list of Dependency objects for the given types.

        Multiple types can be specified. Possible types are:
        'Breaks', 'Conflicts', 'Depends', 'Enhances', 'PreDepends',
        'Recommends', 'Replaces', 'Suggests'

        Additional types might be added in the future.
        """
        depends_list = []
        depends = self._cand.depends_list
        for type_ in types:
            try:
                for dep_ver_list in depends[type_]:
                    base_deps = []
                    for dep_or in dep_ver_list:
                        base_deps.append(BaseDependency(self, dep_or))
                    depends_list.append(Dependency(self, base_deps, type_))
            except KeyError:
                pass
        return depends_list

    @property
    def provides(self):
        """ Return a list of names that this version provides."""
        return [p[0] for p in self._cand.provides_list]

    @property
    def enhances(self):
        """Return the list of enhances for the package version."""
        return self.get_dependencies("Enhances")

    @property
    def dependencies(self):
        """Return the dependencies of the package version."""
        return self.get_dependencies("PreDepends", "Depends")

    @property
    def recommends(self):
        """Return the recommends of the package version."""
        return self.get_dependencies("Recommends")

    @property
    def suggests(self):
        """Return the suggests of the package version."""
        return self.get_dependencies("Suggests")

    @property
    def origins(self):
        """Return a list of origins for the package version."""
        origins = []
        for (packagefile, _unused) in self._cand.file_list:
            origins.append(Origin(self.package, packagefile))
        return origins

    @property
    def filename(self):
        """Return the path to the file inside the archive.

        .. versionadded:: 0.7.10
        """
        return self._records.filename

    @property
    def md5(self):
        """Return the md5sum of the binary.

        .. versionadded:: 0.7.10
        """
        return self._records.md5_hash

    @property
    def sha1(self):
        """Return the sha1sum of the binary.

        .. versionadded:: 0.7.10
        """
        return self._records.sha1_hash

    @property
    def sha256(self):
        """Return the sha256sum of the binary.

        .. versionadded:: 0.7.10
        """
        return self._records.sha256_hash

    @property
    def tasks(self):
        """Get the tasks of the package.

        A set of the names of the tasks this package belongs to.

        .. versionadded:: 0.8.0
        """
        return set(self.record["Task"].split())

    def _uris(self):
        """Return an iterator over all available urls.

        .. versionadded:: 0.7.10
        """
        for (packagefile, _unused) in self._cand.file_list:
            indexfile = self.package._pcache._list.find_index(packagefile)
            if indexfile:
                yield indexfile.archive_uri(self._records.filename)

    @property
    def uris(self):
        """Return a list of all available uris for the binary.

        .. versionadded:: 0.7.10
        """
        return list(self._uris())

    @property
    def uri(self):
        """Return a single URI for the binary.

        .. versionadded:: 0.7.10
        """
        try:
            return next(iter(self._uris()))
        except StopIteration:
            return None

    def fetch_binary(self, destdir='', progress=None):
        """Fetch the binary version of the package.

        The parameter *destdir* specifies the directory where the package will
        be fetched to.

        The parameter *progress* may refer to an apt_pkg.AcquireProgress()
        object. If not specified or None, apt.progress.text.AcquireProgress()
        is used.

        .. versionadded:: 0.7.10
        """
        base = os.path.basename(self._records.filename)
        destfile = os.path.join(destdir, base)
        if _file_is_same(destfile, self.size, self._records.md5_hash):
            print(('Ignoring already existing file: %s' % destfile))
            return os.path.abspath(destfile)
        acq = apt_pkg.Acquire(progress or apt.progress.text.AcquireProgress())
        acqfile = apt_pkg.AcquireFile(acq, self.uri, self._records.md5_hash,
                                      self.size, base, destfile=destfile)
        acq.run()

        if acqfile.status != acqfile.STAT_DONE:
            raise FetchError("The item %r could not be fetched: %s" %
                             (acqfile.destfile, acqfile.error_text))

        return os.path.abspath(destfile)

    def fetch_source(self, destdir="", progress=None, unpack=True):
        """Get the source code of a package.

        The parameter *destdir* specifies the directory where the source will
        be fetched to.

        The parameter *progress* may refer to an apt_pkg.AcquireProgress()
        object. If not specified or None, apt.progress.text.AcquireProgress()
        is used.

        The parameter *unpack* describes whether the source should be unpacked
        (``True``) or not (``False``). By default, it is unpacked.

        If *unpack* is ``True``, the path to the extracted directory is
        returned. Otherwise, the path to the .dsc file is returned.
        """
        src = apt_pkg.SourceRecords()
        acq = apt_pkg.Acquire(progress or apt.progress.text.AcquireProgress())

        dsc = None
        record = self._records
        source_name = record.source_pkg or self.package.shortname
        source_version = record.source_ver or self._cand.ver_str
        source_lookup = src.lookup(source_name)

        while source_lookup and source_version != src.version:
            source_lookup = src.lookup(source_name)
        if not source_lookup:
            raise ValueError("No source for %r" % self)
        files = list()
        for md5, size, path, type_ in src.files:
            base = os.path.basename(path)
            destfile = os.path.join(destdir, base)
            if type_ == 'dsc':
                dsc = destfile
            if _file_is_same(destfile, size, md5):
                print(('Ignoring already existing file: %s' % destfile))
                continue
            files.append(apt_pkg.AcquireFile(acq, src.index.archive_uri(path),
                         md5, size, base, destfile=destfile))
        acq.run()

        for item in acq.items:
            if item.status != item.STAT_DONE:
                raise FetchError("The item %r could not be fetched: %s" %
                                 (item.destfile, item.error_text))

        if unpack:
            outdir = src.package + '-' + apt_pkg.upstream_version(src.version)
            outdir = os.path.join(destdir, outdir)
            subprocess.check_call(["dpkg-source", "-x", dsc, outdir])
            return os.path.abspath(outdir)
        else:
            return os.path.abspath(dsc)


class VersionList(Sequence):
    """Provide a mapping & sequence interface to all versions of a package.

    This class can be used like a dictionary, where version strings are the
    keys. It can also be used as a sequence, where integers are the keys.

    You can also convert this to a dictionary or a list, using the usual way
    of dict(version_list) or list(version_list). This is useful if you need
    to access the version objects multiple times, because they do not have to
    be recreated this way.

    Examples ('package.versions' being a version list):
        '0.7.92' in package.versions # Check whether 0.7.92 is a valid version.
        package.versions[0] # Return first version or raise IndexError
        package.versions[0:2] # Return a new VersionList for objects 0-2
        package.versions['0.7.92'] # Return version 0.7.92 or raise KeyError
        package.versions.keys() # All keys, as strings.
        max(package.versions)
    """

    def __init__(self, package, slice_=None):
        self._package = package  # apt.package.Package()
        self._versions = package._pkg.version_list  # [apt_pkg.Version(), ...]
        if slice_:
            self._versions = self._versions[slice_]

    def __getitem__(self, item):
        if isinstance(item, slice):
            return self.__class__(self._package, item)
        try:
            # Sequence interface, item is an integer
            return Version(self._package, self._versions[item])
        except TypeError:
            # Dictionary interface item is a string.
            for ver in self._versions:
                if ver.ver_str == item:
                    return Version(self._package, ver)
        raise KeyError("Version: %r not found." % (item))

    def __str__(self):
        return '[%s]' % (', '.join(str(ver) for ver in self))

    def __repr__(self):
        return '<VersionList: %r>' % self.keys()

    def __iter__(self):
        """Return an iterator over all value objects."""
        return (Version(self._package, ver) for ver in self._versions)

    def __contains__(self, item):
        if isinstance(item, Version):  # Sequence interface
            item = item.version
        # Dictionary interface.
        for ver in self._versions:
            if ver.ver_str == item:
                return True
        return False

    def __eq__(self, other):
        return list(self) == list(other)

    def __len__(self):
        return len(self._versions)

    # Mapping interface

    def keys(self):
        """Return a list of all versions, as strings."""
        return [ver.ver_str for ver in self._versions]

    def get(self, key, default=None):
        """Return the key or the default."""
        try:
            return self[key]
        except LookupError:
            return default


class Package(object):
    """Representation of a package in a cache.

    This class provides methods and properties for working with a package. It
    lets you mark the package for installation, check if it is installed, and
    much more.
    """

    def __init__(self, pcache, pkgiter):
        """ Init the Package object """
        self._pkg = pkgiter
        self._pcache = pcache           # python cache in cache.py
        self._changelog = ""            # Cached changelog

    def __str__(self):
        return self.name

    def __repr__(self):
        return '<Package: name:%r architecture=%r id:%r>' % (
            self._pkg.name, self._pkg.architecture, self._pkg.id)

    def __lt__(self, other):
        return self.name < other.name

    def candidate(self):
        """Return the candidate version of the package.

        This property is writeable to allow you to set the candidate version
        of the package. Just assign a Version() object, and it will be set as
        the candidate version.
        """
        cand = self._pcache._depcache.get_candidate_ver(self._pkg)
        if cand is not None:
            return Version(self, cand)

    def __set_candidate(self, version):
        """Set the candidate version of the package."""
        self._pcache.cache_pre_change()
        self._pcache._depcache.set_candidate_ver(self._pkg, version._cand)
        self._pcache.cache_post_change()

    candidate = property(candidate, __set_candidate)

    @property
    def installed(self):
        """Return the currently installed version of the package.

        .. versionadded:: 0.7.9
        """
        if self._pkg.current_ver is not None:
            return Version(self, self._pkg.current_ver)

    @property
    def name(self):
        """Return the name of the package, possibly including architecture.

        If the package is not part of the system's preferred architecture,
        return the same as :attr:`fullname`, otherwise return the same
        as :attr:`shortname`

        .. versionchanged:: 0.7.100.3

        As part of multi-arch, this field now may include architecture
        information.
        """
        return self._pkg.get_fullname(True)

    @property
    def fullname(self):
        """Return the name of the package, including architecture.

        .. versionadded:: 0.7.100.3"""
        return self._pkg.get_fullname(False)

    @property
    def shortname(self):
        """Return the name of the package, without architecture.

        .. versionadded:: 0.7.100.3"""
        return self._pkg.name

    @property
    def id(self):
        """Return a uniq ID for the package.

        This can be used eg. to store additional information about the pkg."""
        return self._pkg.id

    def __hash__(self):
        """Return the hash of the object.

        This returns the same value as ID, which is unique."""
        return self._pkg.id

    @property
    def essential(self):
        """Return True if the package is an essential part of the system."""
        return self._pkg.essential

    def architecture(self):
        """Return the Architecture of the package.

        .. versionchanged:: 0.7.100.3
            This is now the package's architecture in the multi-arch sense,
            previously it was the architecture of the candidate version
            and deprecated.
        """
        return self._pkg.architecture

    @property
    def section(self):
        """Return the section of the package."""
        return self._pkg.section

    # depcache states

    @property
    def marked_install(self):
        """Return ``True`` if the package is marked for install."""
        return self._pcache._depcache.marked_install(self._pkg)

    @property
    def marked_upgrade(self):
        """Return ``True`` if the package is marked for upgrade."""
        return self._pcache._depcache.marked_upgrade(self._pkg)

    @property
    def marked_delete(self):
        """Return ``True`` if the package is marked for delete."""
        return self._pcache._depcache.marked_delete(self._pkg)

    @property
    def marked_keep(self):
        """Return ``True`` if the package is marked for keep."""
        return self._pcache._depcache.marked_keep(self._pkg)

    @property
    def marked_downgrade(self):
        """ Package is marked for downgrade """
        return self._pcache._depcache.marked_downgrade(self._pkg)

    @property
    def marked_reinstall(self):
        """Return ``True`` if the package is marked for reinstall."""
        return self._pcache._depcache.marked_reinstall(self._pkg)

    @property
    def is_installed(self):
        """Return ``True`` if the package is installed."""
        return (self._pkg.current_ver is not None)

    @property
    def is_upgradable(self):
        """Return ``True`` if the package is upgradable."""
        return (self.is_installed and
                self._pcache._depcache.is_upgradable(self._pkg))

    @property
    def is_auto_removable(self):
        """Return ``True`` if the package is no longer required.

        If the package has been installed automatically as a dependency of
        another package, and if no packages depend on it anymore, the package
        is no longer required.
        """
        return ((self.is_installed or self.marked_install) and
                self._pcache._depcache.is_garbage(self._pkg))

    @property
    def is_auto_installed(self):
        """Return whether the package is marked as automatically installed."""
        return self._pcache._depcache.is_auto_installed(self._pkg)
    # sizes

    @property
    def installed_files(self):
        """Return a list of files installed by the package.

        Return a list of unicode names of the files which have
        been installed by this package
        """
        for name in self.name, self.fullname:
            path = "/var/lib/dpkg/info/%s.list" % name
            try:
                with open(path, "rb") as file_list:
                    return file_list.read().decode("utf-8").split(u"\n")
            except EnvironmentError:
                continue

        return []

    def get_changelog(self, uri=None, cancel_lock=None):
        """
        Download the changelog of the package and return it as unicode
        string.

        The parameter *uri* refers to the uri of the changelog file. It may
        contain multiple named variables which will be substitued. These
        variables are (src_section, prefix, src_pkg, src_ver). An example is
        the Ubuntu changelog::

            "http://changelogs.ubuntu.com/changelogs/pool" \\
                "/%(src_section)s/%(prefix)s/%(src_pkg)s" \\
                "/%(src_pkg)s_%(src_ver)s/changelog"

        The parameter *cancel_lock* refers to an instance of threading.Lock,
        which if set, prevents the download.
        """
        # Return a cached changelog if available
        if self._changelog != u"":
            return self._changelog

        if uri is None:
            if not self.candidate:
                pass
            if self.candidate.origins[0].origin == "Debian":
                uri = "http://packages.debian.org/changelogs/pool" \
                      "/%(src_section)s/%(prefix)s/%(src_pkg)s" \
                      "/%(src_pkg)s_%(src_ver)s/changelog"
            elif self.candidate.origins[0].origin == "Ubuntu":
                uri = "http://changelogs.ubuntu.com/changelogs/pool" \
                      "/%(src_section)s/%(prefix)s/%(src_pkg)s" \
                      "/%(src_pkg)s_%(src_ver)s/changelog"
            else:
                res = _("The list of changes is not available")
                return res if isinstance(res, unicode) else res.decode("utf-8")

        # get the src package name
        src_pkg = self.candidate.source_name

        # assume "main" section
        src_section = "main"
        # use the section of the candidate as a starting point
        section = self.candidate.section

        # get the source version
        src_ver = self.candidate.source_version

        try:
            # try to get the source version of the pkg, this differs
            # for some (e.g. libnspr4 on ubuntu)
            # this feature only works if the correct deb-src are in the
            # sources.list otherwise we fall back to the binary version number
            src_records = apt_pkg.SourceRecords()
        except SystemError:
            pass
        else:
            while src_records.lookup(src_pkg):
                if not src_records.version:
                    continue
                if self.candidate.source_version == src_records.version:
                    # Direct match, use it and do not do more lookups.
                    src_ver = src_records.version
                    section = src_records.section
                    break
                if apt_pkg.version_compare(src_records.version, src_ver) > 0:
                    # The version is higher, it seems to match.
                    src_ver = src_records.version
                    section = src_records.section

        section_split = section.split("/", 1)
        if len(section_split) > 1:
            src_section = section_split[0]
        del section_split

        # lib is handled special
        prefix = src_pkg[0]
        if src_pkg.startswith("lib"):
            prefix = "lib" + src_pkg[3]

        # stip epoch
        src_ver_split = src_ver.split(":", 1)
        if len(src_ver_split) > 1:
            src_ver = "".join(src_ver_split[1:])
        del src_ver_split

        uri = uri % {"src_section": src_section,
                     "prefix": prefix,
                     "src_pkg": src_pkg,
                     "src_ver": src_ver}

        timeout = socket.getdefaulttimeout()

        # FIXME: when python2.4 vanishes from the archive,
        #        merge this into a single try..finally block (pep 341)
        try:
            try:
                # Set a timeout for the changelog download
                socket.setdefaulttimeout(2)

                # Check if the download was canceled
                if cancel_lock and cancel_lock.isSet():
                    return u""
                # FIXME: python3.2: Should be closed manually
                changelog_file = urlopen(uri)
                # do only get the lines that are new
                changelog = u""
                regexp = "^%s \((.*)\)(.*)$" % (re.escape(src_pkg))
                while True:
                    # Check if the download was canceled
                    if cancel_lock and cancel_lock.isSet():
                        return u""
                    # Read changelog line by line
                    line_raw = changelog_file.readline()
                    if not line_raw:
                        break
                    # The changelog is encoded in utf-8, but since there isn't
                    # any http header, urllib2 seems to treat it as ascii
                    line = line_raw.decode("utf-8")

                    #print line.encode('utf-8')
                    match = re.match(regexp, line)
                    if match:
                        # strip epoch from installed version
                        # and from changelog too
                        installed = getattr(self.installed, 'version', None)
                        if installed and ":" in installed:
                            installed = installed.split(":", 1)[1]
                        changelog_ver = match.group(1)
                        if changelog_ver and ":" in changelog_ver:
                            changelog_ver = changelog_ver.split(":", 1)[1]

                        if (installed and apt_pkg.version_compare(
                                changelog_ver, installed) <= 0):
                            break
                    # EOF (shouldn't really happen)
                    changelog += line

                # Print an error if we failed to extract a changelog
                if len(changelog) == 0:
                    changelog = _("The list of changes is not available")
                    if not isinstance(changelog, unicode):
                        changelog = changelog.decode("utf-8")
                self._changelog = changelog

            except HTTPError:
                if self.candidate.origins[0].origin == "Ubuntu":
                    res = _("The list of changes is not available yet.\n\n"
                            "Please use "
                            "http://launchpad.net/ubuntu/+source/%s/"
                            "%s/+changelog\n"
                            "until the changes become available or try again "
                            "later.") % (src_pkg, src_ver)
                else:
                    res = _("The list of changes is not available")
                return res if isinstance(res, unicode) else res.decode("utf-8")
            except (IOError, BadStatusLine):
                res = _("Failed to download the list of changes. \nPlease "
                        "check your Internet connection.")
                return res if isinstance(res, unicode) else res.decode("utf-8")
        finally:
            socket.setdefaulttimeout(timeout)
        return self._changelog

    @property
    def versions(self):
        """Return a VersionList() object for all available versions.

        .. versionadded:: 0.7.9
        """
        return VersionList(self)

    @property
    def is_inst_broken(self):
        """Return True if the to-be-installed package is broken."""
        return self._pcache._depcache.is_inst_broken(self._pkg)

    @property
    def is_now_broken(self):
        """Return True if the installed package is broken."""
        return self._pcache._depcache.is_now_broken(self._pkg)

    @property
    def has_config_files(self):
        """Checks whether the package is is the config-files state."""
        return self. _pkg.current_state == apt_pkg.CURSTATE_CONFIG_FILES

    # depcache actions

    def mark_keep(self):
        """Mark a package for keep."""
        self._pcache.cache_pre_change()
        self._pcache._depcache.mark_keep(self._pkg)
        self._pcache.cache_post_change()

    def mark_delete(self, auto_fix=True, purge=False):
        """Mark a package for deletion.

        If *auto_fix* is ``True``, the resolver will be run, trying to fix
        broken packages.  This is the default.

        If *purge* is ``True``, remove the configuration files of the package
        as well.  The default is to keep the configuration.
        """
        self._pcache.cache_pre_change()
        self._pcache._depcache.mark_delete(self._pkg, purge)
        # try to fix broken stuffsta
        if auto_fix and self._pcache._depcache.broken_count > 0:
            fix = apt_pkg.ProblemResolver(self._pcache._depcache)
            fix.clear(self._pkg)
            fix.protect(self._pkg)
            fix.remove(self._pkg)
            fix.install_protect()
            fix.resolve()
        self._pcache.cache_post_change()

    def mark_install(self, auto_fix=True, auto_inst=True, from_user=True):
        """Mark a package for install.

        If *autoFix* is ``True``, the resolver will be run, trying to fix
        broken packages.  This is the default.

        If *autoInst* is ``True``, the dependencies of the packages will be
        installed automatically.  This is the default.

        If *fromUser* is ``True``, this package will not be marked as
        automatically installed. This is the default. Set it to False if you
        want to be able to automatically remove the package at a later stage
        when no other package depends on it.
        """
        self._pcache.cache_pre_change()
        self._pcache._depcache.mark_install(self._pkg, auto_inst, from_user)
        # try to fix broken stuff
        if auto_fix and self._pcache._depcache.broken_count > 0:
            fixer = apt_pkg.ProblemResolver(self._pcache._depcache)
            fixer.clear(self._pkg)
            fixer.protect(self._pkg)
            fixer.resolve(True)
        self._pcache.cache_post_change()

    def mark_upgrade(self, from_user=True):
        """Mark a package for upgrade."""
        if self.is_upgradable:
            auto = self.is_auto_installed
            self.mark_install(from_user=from_user)
            self.mark_auto(auto)
        else:
            # FIXME: we may want to throw a exception here
            sys.stderr.write(("MarkUpgrade() called on a non-upgrable pkg: "
                              "'%s'\n") % self._pkg.name)

    def mark_auto(self, auto=True):
        """Mark a package as automatically installed.

        Call this function to mark a package as automatically installed. If the
        optional parameter *auto* is set to ``False``, the package will not be
        marked as automatically installed anymore. The default is ``True``.
        """
        self._pcache._depcache.mark_auto(self._pkg, auto)

    def commit(self, fprogress, iprogress):
        """Commit the changes.

        The parameter *fprogress* refers to a apt_pkg.AcquireProgress() object,
        like apt.progress.text.AcquireProgress().

        The parameter *iprogress* refers to an InstallProgress() object, as
        found in apt.progress.base.
        """
        self._pcache._depcache.commit(fprogress, iprogress)


def _test():
    """Self-test."""
    print("Self-test for the Package modul")
    import random
    apt_pkg.init()
    progress = apt.progress.text.OpProgress()
    cache = apt.Cache(progress)
    pkg = cache["apt-utils"]
    print("Name: %s " % pkg.name)
    print("ID: %s " % pkg.id)
    print("Priority (Candidate): %s " % pkg.candidate.priority)
    print("Priority (Installed): %s " % pkg.installed.priority)
    print("Installed: %s " % pkg.installed.version)
    print("Candidate: %s " % pkg.candidate.version)
    print("CandidateDownloadable: %s" % pkg.candidate.downloadable)
    print("CandidateOrigins: %s" % pkg.candidate.origins)
    print("SourcePkg: %s " % pkg.candidate.source_name)
    print("Section: %s " % pkg.section)
    print("Summary: %s" % pkg.candidate.summary)
    print("Description (formatted) :\n%s" % pkg.candidate.description)
    print("Description (unformatted):\n%s" % pkg.candidate.raw_description)
    print("InstalledSize: %s " % pkg.candidate.installed_size)
    print("PackageSize: %s " % pkg.candidate.size)
    print("Dependencies: %s" % pkg.installed.dependencies)
    print("Recommends: %s" % pkg.installed.recommends)
    for dep in pkg.candidate.dependencies:
        print(",".join("%s (%s) (%s) (%s)" % (o.name, o.version, o.relation,
                       o.pre_depend) for o in dep.or_dependencies))
    print("arch: %s" % pkg.candidate.architecture)
    print("homepage: %s" % pkg.candidate.homepage)
    print("rec: ", pkg.candidate.record)

    print(cache["2vcard"].get_changelog())
    for i in True, False:
        print("Running install on random upgradable pkgs with AutoFix: ", i)
        for pkg in cache:
            if pkg.is_upgradable:
                if random.randint(0, 1) == 1:
                    pkg.mark_install(i)
        print("Broken: %s " % cache._depcache.broken_count)
        print("InstCount: %s " % cache._depcache.inst_count)

    print()
    # get a new cache
    for i in True, False:
        print("Randomly remove some packages with AutoFix: %s" % i)
        cache = apt.Cache(progress)
        for name in cache.keys():
            if random.randint(0, 1) == 1:
                try:
                    cache[name].mark_delete(i)
                except SystemError:
                    print("Error trying to remove: %s " % name)
        print("Broken: %s " % cache._depcache.broken_count)
        print("DelCount: %s " % cache._depcache.del_count)

# self-test
if __name__ == "__main__":
    _test()