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
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
|
#
# ElementTree
# $Id: ElementTree.py 3440 2008-07-18 14:45:01Z fredrik $
#
# light-weight XML support for Python 2.3 and later.
#
# history (since 1.2.6):
# 2005-11-12 fl added tostringlist/fromstringlist helpers
# 2006-07-05 fl merged in selected changes from the 1.3 sandbox
# 2006-07-05 fl removed support for 2.1 and earlier
# 2007-06-21 fl added deprecation/future warnings
# 2007-08-25 fl added doctype hook, added parser version attribute etc
# 2007-08-26 fl added new serializer code (better namespace handling, etc)
# 2007-08-27 fl warn for broken /tag searches on tree level
# 2007-09-02 fl added html/text methods to serializer (experimental)
# 2007-09-05 fl added method argument to tostring/tostringlist
# 2007-09-06 fl improved error handling
# 2007-09-13 fl added itertext, iterfind; assorted cleanups
# 2007-12-15 fl added C14N hooks, copy method (experimental)
#
# Copyright (c) 1999-2008 by Fredrik Lundh. All rights reserved.
#
# fredrik@pythonware.com
# http://www.pythonware.com
#
# --------------------------------------------------------------------
# The ElementTree toolkit is
#
# Copyright (c) 1999-2008 by Fredrik Lundh
#
# By obtaining, using, and/or copying this software and/or its
# associated documentation, you agree that you have read, understood,
# and will comply with the following terms and conditions:
#
# Permission to use, copy, modify, and distribute this software and
# its associated documentation for any purpose and without fee is
# hereby granted, provided that the above copyright notice appears in
# all copies, and that both that copyright notice and this permission
# notice appear in supporting documentation, and that the name of
# Secret Labs AB or the author not be used in advertising or publicity
# pertaining to distribution of the software without specific, written
# prior permission.
#
# SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
# TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANT-
# ABILITY AND FITNESS. IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR
# BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
# OF THIS SOFTWARE.
# --------------------------------------------------------------------
# Licensed to PSF under a Contributor Agreement.
# See http://www.python.org/psf/license for licensing details.
__all__ = [
# public symbols
"Comment",
"dump",
"Element", "ElementTree",
"fromstring", "fromstringlist",
"iselement", "iterparse",
"parse", "ParseError",
"PI", "ProcessingInstruction",
"QName",
"SubElement",
"tostring", "tostringlist",
"TreeBuilder",
"VERSION",
"XML",
"XMLParser", "XMLTreeBuilder",
]
VERSION = "1.3.0"
##
# The <b>Element</b> type is a flexible container object, designed to
# store hierarchical data structures in memory. The type can be
# described as a cross between a list and a dictionary.
# <p>
# Each element has a number of properties associated with it:
# <ul>
# <li>a <i>tag</i>. This is a string identifying what kind of data
# this element represents (the element type, in other words).</li>
# <li>a number of <i>attributes</i>, stored in a Python dictionary.</li>
# <li>a <i>text</i> string.</li>
# <li>an optional <i>tail</i> string.</li>
# <li>a number of <i>child elements</i>, stored in a Python sequence</li>
# </ul>
#
# To create an element instance, use the {@link #Element} constructor
# or the {@link #SubElement} factory function.
# <p>
# The {@link #ElementTree} class can be used to wrap an element
# structure, and convert it from and to XML.
##
import sys
import re
import warnings
class _SimpleElementPath(object):
# emulate pre-1.2 find/findtext/findall behaviour
def find(self, element, tag, namespaces=None):
for elem in element:
if elem.tag == tag:
return elem
return None
def findtext(self, element, tag, default=None, namespaces=None):
elem = self.find(element, tag)
if elem is None:
return default
return elem.text or ""
def iterfind(self, element, tag, namespaces=None):
if tag[:3] == ".//":
for elem in element.iter(tag[3:]):
yield elem
for elem in element:
if elem.tag == tag:
yield elem
def findall(self, element, tag, namespaces=None):
return list(self.iterfind(element, tag, namespaces))
try:
from . import ElementPath
except ImportError:
ElementPath = _SimpleElementPath()
##
# Parser error. This is a subclass of <b>SyntaxError</b>.
# <p>
# In addition to the exception value, an exception instance contains a
# specific exception code in the <b>code</b> attribute, and the line and
# column of the error in the <b>position</b> attribute.
class ParseError(SyntaxError):
pass
# --------------------------------------------------------------------
##
# Checks if an object appears to be a valid element object.
#
# @param An element instance.
# @return A true value if this is an element object.
# @defreturn flag
def iselement(element):
# FIXME: not sure about this; might be a better idea to look
# for tag/attrib/text attributes
return isinstance(element, Element) or hasattr(element, "tag")
##
# Element class. This class defines the Element interface, and
# provides a reference implementation of this interface.
# <p>
# The element name, attribute names, and attribute values can be
# either ASCII strings (ordinary Python strings containing only 7-bit
# ASCII characters) or Unicode strings.
#
# @param tag The element name.
# @param attrib An optional dictionary, containing element attributes.
# @param **extra Additional attributes, given as keyword arguments.
# @see Element
# @see SubElement
# @see Comment
# @see ProcessingInstruction
class Element(object):
# <tag attrib>text<child/>...</tag>tail
##
# (Attribute) Element tag.
tag = None
##
# (Attribute) Element attribute dictionary. Where possible, use
# {@link #Element.get},
# {@link #Element.set},
# {@link #Element.keys}, and
# {@link #Element.items} to access
# element attributes.
attrib = None
##
# (Attribute) Text before first subelement. This is either a
# string or the value None. Note that if there was no text, this
# attribute may be either None or an empty string, depending on
# the parser.
text = None
##
# (Attribute) Text after this element's end tag, but before the
# next sibling element's start tag. This is either a string or
# the value None. Note that if there was no text, this attribute
# may be either None or an empty string, depending on the parser.
tail = None # text after end tag, if any
# constructor
def __init__(self, tag, attrib={}, **extra):
attrib = attrib.copy()
attrib.update(extra)
self.tag = tag
self.attrib = attrib
self._children = []
def __repr__(self):
return "<Element %s at 0x%x>" % (repr(self.tag), id(self))
##
# Creates a new element object of the same type as this element.
#
# @param tag Element tag.
# @param attrib Element attributes, given as a dictionary.
# @return A new element instance.
def makeelement(self, tag, attrib):
return self.__class__(tag, attrib)
##
# (Experimental) Copies the current element. This creates a
# shallow copy; subelements will be shared with the original tree.
#
# @return A new element instance.
def copy(self):
elem = self.makeelement(self.tag, self.attrib)
elem.text = self.text
elem.tail = self.tail
elem[:] = self
return elem
##
# Returns the number of subelements. Note that this only counts
# full elements; to check if there's any content in an element, you
# have to check both the length and the <b>text</b> attribute.
#
# @return The number of subelements.
def __len__(self):
return len(self._children)
def __nonzero__(self):
warnings.warn(
"The behavior of this method will change in future versions. "
"Use specific 'len(elem)' or 'elem is not None' test instead.",
FutureWarning, stacklevel=2
)
return len(self._children) != 0 # emulate old behaviour, for now
##
# Returns the given subelement, by index.
#
# @param index What subelement to return.
# @return The given subelement.
# @exception IndexError If the given element does not exist.
def __getitem__(self, index):
return self._children[index]
##
# Replaces the given subelement, by index.
#
# @param index What subelement to replace.
# @param element The new element value.
# @exception IndexError If the given element does not exist.
def __setitem__(self, index, element):
# if isinstance(index, slice):
# for elt in element:
# assert iselement(elt)
# else:
# assert iselement(element)
self._children[index] = element
##
# Deletes the given subelement, by index.
#
# @param index What subelement to delete.
# @exception IndexError If the given element does not exist.
def __delitem__(self, index):
del self._children[index]
##
# Adds a subelement to the end of this element. In document order,
# the new element will appear after the last existing subelement (or
# directly after the text, if it's the first subelement), but before
# the end tag for this element.
#
# @param element The element to add.
def append(self, element):
# assert iselement(element)
self._children.append(element)
##
# Appends subelements from a sequence.
#
# @param elements A sequence object with zero or more elements.
# @since 1.3
def extend(self, elements):
# for element in elements:
# assert iselement(element)
self._children.extend(elements)
##
# Inserts a subelement at the given position in this element.
#
# @param index Where to insert the new subelement.
def insert(self, index, element):
# assert iselement(element)
self._children.insert(index, element)
##
# Removes a matching subelement. Unlike the <b>find</b> methods,
# this method compares elements based on identity, not on tag
# value or contents. To remove subelements by other means, the
# easiest way is often to use a list comprehension to select what
# elements to keep, and use slice assignment to update the parent
# element.
#
# @param element What element to remove.
# @exception ValueError If a matching element could not be found.
def remove(self, element):
# assert iselement(element)
self._children.remove(element)
##
# (Deprecated) Returns all subelements. The elements are returned
# in document order.
#
# @return A list of subelements.
# @defreturn list of Element instances
def getchildren(self):
warnings.warn(
"This method will be removed in future versions. "
"Use 'list(elem)' or iteration over elem instead.",
DeprecationWarning, stacklevel=2
)
return self._children
##
# Finds the first matching subelement, by tag name or path.
#
# @param path What element to look for.
# @keyparam namespaces Optional namespace prefix map.
# @return The first matching element, or None if no element was found.
# @defreturn Element or None
def find(self, path, namespaces=None):
return ElementPath.find(self, path, namespaces)
##
# Finds text for the first matching subelement, by tag name or path.
#
# @param path What element to look for.
# @param default What to return if the element was not found.
# @keyparam namespaces Optional namespace prefix map.
# @return The text content of the first matching element, or the
# default value no element was found. Note that if the element
# is found, but has no text content, this method returns an
# empty string.
# @defreturn string
def findtext(self, path, default=None, namespaces=None):
return ElementPath.findtext(self, path, default, namespaces)
##
# Finds all matching subelements, by tag name or path.
#
# @param path What element to look for.
# @keyparam namespaces Optional namespace prefix map.
# @return A list or other sequence containing all matching elements,
# in document order.
# @defreturn list of Element instances
def findall(self, path, namespaces=None):
return ElementPath.findall(self, path, namespaces)
##
# Finds all matching subelements, by tag name or path.
#
# @param path What element to look for.
# @keyparam namespaces Optional namespace prefix map.
# @return An iterator or sequence containing all matching elements,
# in document order.
# @defreturn a generated sequence of Element instances
def iterfind(self, path, namespaces=None):
return ElementPath.iterfind(self, path, namespaces)
##
# Resets an element. This function removes all subelements, clears
# all attributes, and sets the <b>text</b> and <b>tail</b> attributes
# to None.
def clear(self):
self.attrib.clear()
self._children = []
self.text = self.tail = None
##
# Gets an element attribute. Equivalent to <b>attrib.get</b>, but
# some implementations may handle this a bit more efficiently.
#
# @param key What attribute to look for.
# @param default What to return if the attribute was not found.
# @return The attribute value, or the default value, if the
# attribute was not found.
# @defreturn string or None
def get(self, key, default=None):
return self.attrib.get(key, default)
##
# Sets an element attribute. Equivalent to <b>attrib[key] = value</b>,
# but some implementations may handle this a bit more efficiently.
#
# @param key What attribute to set.
# @param value The attribute value.
def set(self, key, value):
self.attrib[key] = value
##
# Gets a list of attribute names. The names are returned in an
# arbitrary order (just like for an ordinary Python dictionary).
# Equivalent to <b>attrib.keys()</b>.
#
# @return A list of element attribute names.
# @defreturn list of strings
def keys(self):
return self.attrib.keys()
##
# Gets element attributes, as a sequence. The attributes are
# returned in an arbitrary order. Equivalent to <b>attrib.items()</b>.
#
# @return A list of (name, value) tuples for all attributes.
# @defreturn list of (string, string) tuples
def items(self):
return self.attrib.items()
##
# Creates a tree iterator. The iterator loops over this element
# and all subelements, in document order, and returns all elements
# with a matching tag.
# <p>
# If the tree structure is modified during iteration, new or removed
# elements may or may not be included. To get a stable set, use the
# list() function on the iterator, and loop over the resulting list.
#
# @param tag What tags to look for (default is to return all elements).
# @return An iterator containing all the matching elements.
# @defreturn iterator
def iter(self, tag=None):
if tag == "*":
tag = None
if tag is None or self.tag == tag:
yield self
for e in self._children:
for e in e.iter(tag):
yield e
# compatibility
def getiterator(self, tag=None):
# Change for a DeprecationWarning in 1.4
warnings.warn(
"This method will be removed in future versions. "
"Use 'elem.iter()' or 'list(elem.iter())' instead.",
PendingDeprecationWarning, stacklevel=2
)
return list(self.iter(tag))
##
# Creates a text iterator. The iterator loops over this element
# and all subelements, in document order, and returns all inner
# text.
#
# @return An iterator containing all inner text.
# @defreturn iterator
def itertext(self):
tag = self.tag
if not isinstance(tag, basestring) and tag is not None:
return
if self.text:
yield self.text
for e in self:
for s in e.itertext():
yield s
if e.tail:
yield e.tail
# compatibility
_Element = _ElementInterface = Element
##
# Subelement factory. This function creates an element instance, and
# appends it to an existing element.
# <p>
# The element name, attribute names, and attribute values can be
# either 8-bit ASCII strings or Unicode strings.
#
# @param parent The parent element.
# @param tag The subelement name.
# @param attrib An optional dictionary, containing element attributes.
# @param **extra Additional attributes, given as keyword arguments.
# @return An element instance.
# @defreturn Element
def SubElement(parent, tag, attrib={}, **extra):
attrib = attrib.copy()
attrib.update(extra)
element = parent.makeelement(tag, attrib)
parent.append(element)
return element
##
# Comment element factory. This factory function creates a special
# element that will be serialized as an XML comment by the standard
# serializer.
# <p>
# The comment string can be either an 8-bit ASCII string or a Unicode
# string.
#
# @param text A string containing the comment string.
# @return An element instance, representing a comment.
# @defreturn Element
def Comment(text=None):
element = Element(Comment)
element.text = text
return element
##
# PI element factory. This factory function creates a special element
# that will be serialized as an XML processing instruction by the standard
# serializer.
#
# @param target A string containing the PI target.
# @param text A string containing the PI contents, if any.
# @return An element instance, representing a PI.
# @defreturn Element
def ProcessingInstruction(target, text=None):
element = Element(ProcessingInstruction)
element.text = target
if text:
element.text = element.text + " " + text
return element
PI = ProcessingInstruction
##
# QName wrapper. This can be used to wrap a QName attribute value, in
# order to get proper namespace handling on output.
#
# @param text A string containing the QName value, in the form {uri}local,
# or, if the tag argument is given, the URI part of a QName.
# @param tag Optional tag. If given, the first argument is interpreted as
# an URI, and this argument is interpreted as a local name.
# @return An opaque object, representing the QName.
class QName(object):
def __init__(self, text_or_uri, tag=None):
if tag:
text_or_uri = "{%s}%s" % (text_or_uri, tag)
self.text = text_or_uri
def __str__(self):
return self.text
def __hash__(self):
return hash(self.text)
def __cmp__(self, other):
if isinstance(other, QName):
return cmp(self.text, other.text)
return cmp(self.text, other)
# --------------------------------------------------------------------
##
# ElementTree wrapper class. This class represents an entire element
# hierarchy, and adds some extra support for serialization to and from
# standard XML.
#
# @param element Optional root element.
# @keyparam file Optional file handle or file name. If given, the
# tree is initialized with the contents of this XML file.
class ElementTree(object):
def __init__(self, element=None, file=None):
# assert element is None or iselement(element)
self._root = element # first node
if file:
self.parse(file)
##
# Gets the root element for this tree.
#
# @return An element instance.
# @defreturn Element
def getroot(self):
return self._root
##
# Replaces the root element for this tree. This discards the
# current contents of the tree, and replaces it with the given
# element. Use with care.
#
# @param element An element instance.
def _setroot(self, element):
# assert iselement(element)
self._root = element
##
# Loads an external XML document into this element tree.
#
# @param source A file name or file object. If a file object is
# given, it only has to implement a <b>read(n)</b> method.
# @keyparam parser An optional parser instance. If not given, the
# standard {@link XMLParser} parser is used.
# @return The document root element.
# @defreturn Element
# @exception ParseError If the parser fails to parse the document.
def parse(self, source, parser=None):
close_source = False
if not hasattr(source, "read"):
source = open(source, "rb")
close_source = True
try:
if not parser:
parser = XMLParser(target=TreeBuilder())
while 1:
data = source.read(65536)
if not data:
break
parser.feed(data)
self._root = parser.close()
return self._root
finally:
if close_source:
source.close()
##
# Creates a tree iterator for the root element. The iterator loops
# over all elements in this tree, in document order.
#
# @param tag What tags to look for (default is to return all elements)
# @return An iterator.
# @defreturn iterator
def iter(self, tag=None):
# assert self._root is not None
return self._root.iter(tag)
# compatibility
def getiterator(self, tag=None):
# Change for a DeprecationWarning in 1.4
warnings.warn(
"This method will be removed in future versions. "
"Use 'tree.iter()' or 'list(tree.iter())' instead.",
PendingDeprecationWarning, stacklevel=2
)
return list(self.iter(tag))
##
# Same as getroot().find(path), starting at the root of the
# tree.
#
# @param path What element to look for.
# @keyparam namespaces Optional namespace prefix map.
# @return The first matching element, or None if no element was found.
# @defreturn Element or None
def find(self, path, namespaces=None):
# assert self._root is not None
if path[:1] == "/":
path = "." + path
warnings.warn(
"This search is broken in 1.3 and earlier, and will be "
"fixed in a future version. If you rely on the current "
"behaviour, change it to %r" % path,
FutureWarning, stacklevel=2
)
return self._root.find(path, namespaces)
##
# Same as getroot().findtext(path), starting at the root of the tree.
#
# @param path What element to look for.
# @param default What to return if the element was not found.
# @keyparam namespaces Optional namespace prefix map.
# @return The text content of the first matching element, or the
# default value no element was found. Note that if the element
# is found, but has no text content, this method returns an
# empty string.
# @defreturn string
def findtext(self, path, default=None, namespaces=None):
# assert self._root is not None
if path[:1] == "/":
path = "." + path
warnings.warn(
"This search is broken in 1.3 and earlier, and will be "
"fixed in a future version. If you rely on the current "
"behaviour, change it to %r" % path,
FutureWarning, stacklevel=2
)
return self._root.findtext(path, default, namespaces)
##
# Same as getroot().findall(path), starting at the root of the tree.
#
# @param path What element to look for.
# @keyparam namespaces Optional namespace prefix map.
# @return A list or iterator containing all matching elements,
# in document order.
# @defreturn list of Element instances
def findall(self, path, namespaces=None):
# assert self._root is not None
if path[:1] == "/":
path = "." + path
warnings.warn(
"This search is broken in 1.3 and earlier, and will be "
"fixed in a future version. If you rely on the current "
"behaviour, change it to %r" % path,
FutureWarning, stacklevel=2
)
return self._root.findall(path, namespaces)
##
# Finds all matching subelements, by tag name or path.
# Same as getroot().iterfind(path).
#
# @param path What element to look for.
# @keyparam namespaces Optional namespace prefix map.
# @return An iterator or sequence containing all matching elements,
# in document order.
# @defreturn a generated sequence of Element instances
def iterfind(self, path, namespaces=None):
# assert self._root is not None
if path[:1] == "/":
path = "." + path
warnings.warn(
"This search is broken in 1.3 and earlier, and will be "
"fixed in a future version. If you rely on the current "
"behaviour, change it to %r" % path,
FutureWarning, stacklevel=2
)
return self._root.iterfind(path, namespaces)
##
# Writes the element tree to a file, as XML.
#
# @def write(file, **options)
# @param file A file name, or a file object opened for writing.
# @param **options Options, given as keyword arguments.
# @keyparam encoding Optional output encoding (default is US-ASCII).
# @keyparam xml_declaration Controls if an XML declaration should
# be added to the file. Use False for never, True for always,
# None for only if not US-ASCII or UTF-8. None is default.
# @keyparam default_namespace Sets the default XML namespace (for "xmlns").
# @keyparam method Optional output method ("xml", "html", "text" or
# "c14n"; default is "xml").
def write(self, file_or_filename,
# keyword arguments
encoding=None,
xml_declaration=None,
default_namespace=None,
method=None):
# assert self._root is not None
if not method:
method = "xml"
elif method not in _serialize:
# FIXME: raise an ImportError for c14n if ElementC14N is missing?
raise ValueError("unknown method %r" % method)
if hasattr(file_or_filename, "write"):
file = file_or_filename
else:
file = open(file_or_filename, "wb")
write = file.write
if not encoding:
if method == "c14n":
encoding = "utf-8"
else:
encoding = "us-ascii"
elif xml_declaration or (xml_declaration is None and
encoding not in ("utf-8", "us-ascii")):
if method == "xml":
write("<?xml version='1.0' encoding='%s'?>\n" % encoding)
if method == "text":
_serialize_text(write, self._root, encoding)
else:
qnames, namespaces = _namespaces(
self._root, encoding, default_namespace
)
serialize = _serialize[method]
serialize(write, self._root, encoding, qnames, namespaces)
if file_or_filename is not file:
file.close()
def write_c14n(self, file):
# lxml.etree compatibility. use output method instead
return self.write(file, method="c14n")
# --------------------------------------------------------------------
# serialization support
def _namespaces(elem, encoding, default_namespace=None):
# identify namespaces used in this tree
# maps qnames to *encoded* prefix:local names
qnames = {None: None}
# maps uri:s to prefixes
namespaces = {}
if default_namespace:
namespaces[default_namespace] = ""
def encode(text):
return text.encode(encoding)
def add_qname(qname):
# calculate serialized qname representation
try:
if qname[:1] == "{":
uri, tag = qname[1:].rsplit("}", 1)
prefix = namespaces.get(uri)
if prefix is None:
prefix = _namespace_map.get(uri)
if prefix is None:
prefix = "ns%d" % len(namespaces)
if prefix != "xml":
namespaces[uri] = prefix
if prefix:
qnames[qname] = encode("%s:%s" % (prefix, tag))
else:
qnames[qname] = encode(tag) # default element
else:
if default_namespace:
# FIXME: can this be handled in XML 1.0?
raise ValueError(
"cannot use non-qualified names with "
"default_namespace option"
)
qnames[qname] = encode(qname)
except TypeError:
_raise_serialization_error(qname)
# populate qname and namespaces table
try:
iterate = elem.iter
except AttributeError:
iterate = elem.getiterator # cET compatibility
for elem in iterate():
tag = elem.tag
if isinstance(tag, QName):
if tag.text not in qnames:
add_qname(tag.text)
elif isinstance(tag, basestring):
if tag not in qnames:
add_qname(tag)
elif tag is not None and tag is not Comment and tag is not PI:
_raise_serialization_error(tag)
for key, value in elem.items():
if isinstance(key, QName):
key = key.text
if key not in qnames:
add_qname(key)
if isinstance(value, QName) and value.text not in qnames:
add_qname(value.text)
text = elem.text
if isinstance(text, QName) and text.text not in qnames:
add_qname(text.text)
return qnames, namespaces
def _serialize_xml(write, elem, encoding, qnames, namespaces):
tag = elem.tag
text = elem.text
if tag is Comment:
write("<!--%s-->" % _encode(text, encoding))
elif tag is ProcessingInstruction:
write("<?%s?>" % _encode(text, encoding))
else:
tag = qnames[tag]
if tag is None:
if text:
write(_escape_cdata(text, encoding))
for e in elem:
_serialize_xml(write, e, encoding, qnames, None)
else:
write("<" + tag)
items = elem.items()
if items or namespaces:
if namespaces:
for v, k in sorted(namespaces.items(),
key=lambda x: x[1]): # sort on prefix
if k:
k = ":" + k
write(" xmlns%s=\"%s\"" % (
k.encode(encoding),
_escape_attrib(v, encoding)
))
for k, v in sorted(items): # lexical order
if isinstance(k, QName):
k = k.text
if isinstance(v, QName):
v = qnames[v.text]
else:
v = _escape_attrib(v, encoding)
write(" %s=\"%s\"" % (qnames[k], v))
if text or len(elem):
write(">")
if text:
write(_escape_cdata(text, encoding))
for e in elem:
_serialize_xml(write, e, encoding, qnames, None)
write("</" + tag + ">")
else:
write(" />")
if elem.tail:
write(_escape_cdata(elem.tail, encoding))
HTML_EMPTY = ("area", "base", "basefont", "br", "col", "frame", "hr",
"img", "input", "isindex", "link", "meta", "param")
try:
HTML_EMPTY = set(HTML_EMPTY)
except NameError:
pass
def _serialize_html(write, elem, encoding, qnames, namespaces):
tag = elem.tag
text = elem.text
if tag is Comment:
write("<!--%s-->" % _escape_cdata(text, encoding))
elif tag is ProcessingInstruction:
write("<?%s?>" % _escape_cdata(text, encoding))
else:
tag = qnames[tag]
if tag is None:
if text:
write(_escape_cdata(text, encoding))
for e in elem:
_serialize_html(write, e, encoding, qnames, None)
else:
write("<" + tag)
items = elem.items()
if items or namespaces:
if namespaces:
for v, k in sorted(namespaces.items(),
key=lambda x: x[1]): # sort on prefix
if k:
k = ":" + k
write(" xmlns%s=\"%s\"" % (
k.encode(encoding),
_escape_attrib(v, encoding)
))
for k, v in sorted(items): # lexical order
if isinstance(k, QName):
k = k.text
if isinstance(v, QName):
v = qnames[v.text]
else:
v = _escape_attrib_html(v, encoding)
# FIXME: handle boolean attributes
write(" %s=\"%s\"" % (qnames[k], v))
write(">")
ltag = tag.lower()
if text:
if ltag == "script" or ltag == "style":
write(_encode(text, encoding))
else:
write(_escape_cdata(text, encoding))
for e in elem:
_serialize_html(write, e, encoding, qnames, None)
if ltag not in HTML_EMPTY:
write("</" + tag + ">")
if elem.tail:
write(_escape_cdata(elem.tail, encoding))
def _serialize_text(write, elem, encoding):
for part in elem.itertext():
write(part.encode(encoding))
if elem.tail:
write(elem.tail.encode(encoding))
_serialize = {
"xml": _serialize_xml,
"html": _serialize_html,
"text": _serialize_text,
# this optional method is imported at the end of the module
# "c14n": _serialize_c14n,
}
##
# Registers a namespace prefix. The registry is global, and any
# existing mapping for either the given prefix or the namespace URI
# will be removed.
#
# @param prefix Namespace prefix.
# @param uri Namespace uri. Tags and attributes in this namespace
# will be serialized with the given prefix, if at all possible.
# @exception ValueError If the prefix is reserved, or is otherwise
# invalid.
def register_namespace(prefix, uri):
if re.match("ns\d+$", prefix):
raise ValueError("Prefix format reserved for internal use")
for k, v in _namespace_map.items():
if k == uri or v == prefix:
del _namespace_map[k]
_namespace_map[uri] = prefix
_namespace_map = {
# "well-known" namespace prefixes
"http://www.w3.org/XML/1998/namespace": "xml",
"http://www.w3.org/1999/xhtml": "html",
"http://www.w3.org/1999/02/22-rdf-syntax-ns#": "rdf",
"http://schemas.xmlsoap.org/wsdl/": "wsdl",
# xml schema
"http://www.w3.org/2001/XMLSchema": "xs",
"http://www.w3.org/2001/XMLSchema-instance": "xsi",
# dublin core
"http://purl.org/dc/elements/1.1/": "dc",
}
def _raise_serialization_error(text):
raise TypeError(
"cannot serialize %r (type %s)" % (text, type(text).__name__)
)
def _encode(text, encoding):
try:
return text.encode(encoding, "xmlcharrefreplace")
except (TypeError, AttributeError):
_raise_serialization_error(text)
def _escape_cdata(text, encoding):
# escape character data
try:
# it's worth avoiding do-nothing calls for strings that are
# shorter than 500 character, or so. assume that's, by far,
# the most common case in most applications.
if "&" in text:
text = text.replace("&", "&")
if "<" in text:
text = text.replace("<", "<")
if ">" in text:
text = text.replace(">", ">")
return text.encode(encoding, "xmlcharrefreplace")
except (TypeError, AttributeError):
_raise_serialization_error(text)
def _escape_attrib(text, encoding):
# escape attribute value
try:
if "&" in text:
text = text.replace("&", "&")
if "<" in text:
text = text.replace("<", "<")
if ">" in text:
text = text.replace(">", ">")
if "\"" in text:
text = text.replace("\"", """)
if "\n" in text:
text = text.replace("\n", " ")
return text.encode(encoding, "xmlcharrefreplace")
except (TypeError, AttributeError):
_raise_serialization_error(text)
def _escape_attrib_html(text, encoding):
# escape attribute value
try:
if "&" in text:
text = text.replace("&", "&")
if ">" in text:
text = text.replace(">", ">")
if "\"" in text:
text = text.replace("\"", """)
return text.encode(encoding, "xmlcharrefreplace")
except (TypeError, AttributeError):
_raise_serialization_error(text)
# --------------------------------------------------------------------
##
# Generates a string representation of an XML element, including all
# subelements.
#
# @param element An Element instance.
# @keyparam encoding Optional output encoding (default is US-ASCII).
# @keyparam method Optional output method ("xml", "html", "text" or
# "c14n"; default is "xml").
# @return An encoded string containing the XML data.
# @defreturn string
def tostring(element, encoding=None, method=None):
class dummy:
pass
data = []
file = dummy()
file.write = data.append
ElementTree(element).write(file, encoding, method=method)
return "".join(data)
##
# Generates a string representation of an XML element, including all
# subelements. The string is returned as a sequence of string fragments.
#
# @param element An Element instance.
# @keyparam encoding Optional output encoding (default is US-ASCII).
# @keyparam method Optional output method ("xml", "html", "text" or
# "c14n"; default is "xml").
# @return A sequence object containing the XML data.
# @defreturn sequence
# @since 1.3
def tostringlist(element, encoding=None, method=None):
class dummy:
pass
data = []
file = dummy()
file.write = data.append
ElementTree(element).write(file, encoding, method=method)
# FIXME: merge small fragments into larger parts
return data
##
# Writes an element tree or element structure to sys.stdout. This
# function should be used for debugging only.
# <p>
# The exact output format is implementation dependent. In this
# version, it's written as an ordinary XML file.
#
# @param elem An element tree or an individual element.
def dump(elem):
# debugging
if not isinstance(elem, ElementTree):
elem = ElementTree(elem)
elem.write(sys.stdout)
tail = elem.getroot().tail
if not tail or tail[-1] != "\n":
sys.stdout.write("\n")
# --------------------------------------------------------------------
# parsing
##
# Parses an XML document into an element tree.
#
# @param source A filename or file object containing XML data.
# @param parser An optional parser instance. If not given, the
# standard {@link XMLParser} parser is used.
# @return An ElementTree instance
def parse(source, parser=None):
tree = ElementTree()
tree.parse(source, parser)
return tree
##
# Parses an XML document into an element tree incrementally, and reports
# what's going on to the user.
#
# @param source A filename or file object containing XML data.
# @param events A list of events to report back. If omitted, only "end"
# events are reported.
# @param parser An optional parser instance. If not given, the
# standard {@link XMLParser} parser is used.
# @return A (event, elem) iterator.
def iterparse(source, events=None, parser=None):
close_source = False
if not hasattr(source, "read"):
source = open(source, "rb")
close_source = True
if not parser:
parser = XMLParser(target=TreeBuilder())
return _IterParseIterator(source, events, parser, close_source)
class _IterParseIterator(object):
def __init__(self, source, events, parser, close_source=False):
self._file = source
self._close_file = close_source
self._events = []
self._index = 0
self._error = None
self.root = self._root = None
self._parser = parser
# wire up the parser for event reporting
parser = self._parser._parser
append = self._events.append
if events is None:
events = ["end"]
for event in events:
if event == "start":
try:
parser.ordered_attributes = 1
parser.specified_attributes = 1
def handler(tag, attrib_in, event=event, append=append,
start=self._parser._start_list):
append((event, start(tag, attrib_in)))
parser.StartElementHandler = handler
except AttributeError:
def handler(tag, attrib_in, event=event, append=append,
start=self._parser._start):
append((event, start(tag, attrib_in)))
parser.StartElementHandler = handler
elif event == "end":
def handler(tag, event=event, append=append,
end=self._parser._end):
append((event, end(tag)))
parser.EndElementHandler = handler
elif event == "start-ns":
def handler(prefix, uri, event=event, append=append):
try:
uri = (uri or "").encode("ascii")
except UnicodeError:
pass
append((event, (prefix or "", uri or "")))
parser.StartNamespaceDeclHandler = handler
elif event == "end-ns":
def handler(prefix, event=event, append=append):
append((event, None))
parser.EndNamespaceDeclHandler = handler
else:
raise ValueError("unknown event %r" % event)
def next(self):
while 1:
try:
item = self._events[self._index]
self._index += 1
return item
except IndexError:
pass
if self._error:
e = self._error
self._error = None
raise e
if self._parser is None:
self.root = self._root
if self._close_file:
self._file.close()
raise StopIteration
# load event buffer
del self._events[:]
self._index = 0
data = self._file.read(16384)
if data:
try:
self._parser.feed(data)
except SyntaxError as exc:
self._error = exc
else:
self._root = self._parser.close()
self._parser = None
def __iter__(self):
return self
##
# Parses an XML document from a string constant. This function can
# be used to embed "XML literals" in Python code.
#
# @param source A string containing XML data.
# @param parser An optional parser instance. If not given, the
# standard {@link XMLParser} parser is used.
# @return An Element instance.
# @defreturn Element
def XML(text, parser=None):
if not parser:
parser = XMLParser(target=TreeBuilder())
parser.feed(text)
return parser.close()
##
# Parses an XML document from a string constant, and also returns
# a dictionary which maps from element id:s to elements.
#
# @param source A string containing XML data.
# @param parser An optional parser instance. If not given, the
# standard {@link XMLParser} parser is used.
# @return A tuple containing an Element instance and a dictionary.
# @defreturn (Element, dictionary)
def XMLID(text, parser=None):
if not parser:
parser = XMLParser(target=TreeBuilder())
parser.feed(text)
tree = parser.close()
ids = {}
for elem in tree.iter():
id = elem.get("id")
if id:
ids[id] = elem
return tree, ids
##
# Parses an XML document from a string constant. Same as {@link #XML}.
#
# @def fromstring(text)
# @param source A string containing XML data.
# @return An Element instance.
# @defreturn Element
fromstring = XML
##
# Parses an XML document from a sequence of string fragments.
#
# @param sequence A list or other sequence containing XML data fragments.
# @param parser An optional parser instance. If not given, the
# standard {@link XMLParser} parser is used.
# @return An Element instance.
# @defreturn Element
# @since 1.3
def fromstringlist(sequence, parser=None):
if not parser:
parser = XMLParser(target=TreeBuilder())
for text in sequence:
parser.feed(text)
return parser.close()
# --------------------------------------------------------------------
##
# Generic element structure builder. This builder converts a sequence
# of {@link #TreeBuilder.start}, {@link #TreeBuilder.data}, and {@link
# #TreeBuilder.end} method calls to a well-formed element structure.
# <p>
# You can use this class to build an element structure using a custom XML
# parser, or a parser for some other XML-like format.
#
# @param element_factory Optional element factory. This factory
# is called to create new Element instances, as necessary.
class TreeBuilder(object):
def __init__(self, element_factory=None):
self._data = [] # data collector
self._elem = [] # element stack
self._last = None # last element
self._tail = None # true if we're after an end tag
if element_factory is None:
element_factory = Element
self._factory = element_factory
##
# Flushes the builder buffers, and returns the toplevel document
# element.
#
# @return An Element instance.
# @defreturn Element
def close(self):
assert len(self._elem) == 0, "missing end tags"
assert self._last is not None, "missing toplevel element"
return self._last
def _flush(self):
if self._data:
if self._last is not None:
text = "".join(self._data)
if self._tail:
assert self._last.tail is None, "internal error (tail)"
self._last.tail = text
else:
assert self._last.text is None, "internal error (text)"
self._last.text = text
self._data = []
##
# Adds text to the current element.
#
# @param data A string. This should be either an 8-bit string
# containing ASCII text, or a Unicode string.
def data(self, data):
self._data.append(data)
##
# Opens a new element.
#
# @param tag The element name.
# @param attrib A dictionary containing element attributes.
# @return The opened element.
# @defreturn Element
def start(self, tag, attrs):
self._flush()
self._last = elem = self._factory(tag, attrs)
if self._elem:
self._elem[-1].append(elem)
self._elem.append(elem)
self._tail = 0
return elem
##
# Closes the current element.
#
# @param tag The element name.
# @return The closed element.
# @defreturn Element
def end(self, tag):
self._flush()
self._last = self._elem.pop()
assert self._last.tag == tag,\
"end tag mismatch (expected %s, got %s)" % (
self._last.tag, tag)
self._tail = 1
return self._last
##
# Element structure builder for XML source data, based on the
# <b>expat</b> parser.
#
# @keyparam target Target object. If omitted, the builder uses an
# instance of the standard {@link #TreeBuilder} class.
# @keyparam html Predefine HTML entities. This flag is not supported
# by the current implementation.
# @keyparam encoding Optional encoding. If given, the value overrides
# the encoding specified in the XML file.
# @see #ElementTree
# @see #TreeBuilder
class XMLParser(object):
def __init__(self, html=0, target=None, encoding=None):
try:
from xml.parsers import expat
except ImportError:
try:
import pyexpat as expat
except ImportError:
raise ImportError(
"No module named expat; use SimpleXMLTreeBuilder instead"
)
parser = expat.ParserCreate(encoding, "}")
if target is None:
target = TreeBuilder()
# underscored names are provided for compatibility only
self.parser = self._parser = parser
self.target = self._target = target
self._error = expat.error
self._names = {} # name memo cache
# callbacks
parser.DefaultHandlerExpand = self._default
parser.StartElementHandler = self._start
parser.EndElementHandler = self._end
parser.CharacterDataHandler = self._data
# optional callbacks
parser.CommentHandler = self._comment
parser.ProcessingInstructionHandler = self._pi
# let expat do the buffering, if supported
try:
self._parser.buffer_text = 1
except AttributeError:
pass
# use new-style attribute handling, if supported
try:
self._parser.ordered_attributes = 1
self._parser.specified_attributes = 1
parser.StartElementHandler = self._start_list
except AttributeError:
pass
self._doctype = None
self.entity = {}
try:
self.version = "Expat %d.%d.%d" % expat.version_info
except AttributeError:
pass # unknown
def _raiseerror(self, value):
err = ParseError(value)
err.code = value.code
err.position = value.lineno, value.offset
raise err
def _fixtext(self, text):
# convert text string to ascii, if possible
try:
return text.encode("ascii")
except UnicodeError:
return text
def _fixname(self, key):
# expand qname, and convert name string to ascii, if possible
try:
name = self._names[key]
except KeyError:
name = key
if "}" in name:
name = "{" + name
self._names[key] = name = self._fixtext(name)
return name
def _start(self, tag, attrib_in):
fixname = self._fixname
fixtext = self._fixtext
tag = fixname(tag)
attrib = {}
for key, value in attrib_in.items():
attrib[fixname(key)] = fixtext(value)
return self.target.start(tag, attrib)
def _start_list(self, tag, attrib_in):
fixname = self._fixname
fixtext = self._fixtext
tag = fixname(tag)
attrib = {}
if attrib_in:
for i in range(0, len(attrib_in), 2):
attrib[fixname(attrib_in[i])] = fixtext(attrib_in[i+1])
return self.target.start(tag, attrib)
def _data(self, text):
return self.target.data(self._fixtext(text))
def _end(self, tag):
return self.target.end(self._fixname(tag))
def _comment(self, data):
try:
comment = self.target.comment
except AttributeError:
pass
else:
return comment(self._fixtext(data))
def _pi(self, target, data):
try:
pi = self.target.pi
except AttributeError:
pass
else:
return pi(self._fixtext(target), self._fixtext(data))
def _default(self, text):
prefix = text[:1]
if prefix == "&":
# deal with undefined entities
try:
self.target.data(self.entity[text[1:-1]])
except KeyError:
from xml.parsers import expat
err = expat.error(
"undefined entity %s: line %d, column %d" %
(text, self._parser.ErrorLineNumber,
self._parser.ErrorColumnNumber)
)
err.code = 11 # XML_ERROR_UNDEFINED_ENTITY
err.lineno = self._parser.ErrorLineNumber
err.offset = self._parser.ErrorColumnNumber
raise err
elif prefix == "<" and text[:9] == "<!DOCTYPE":
self._doctype = [] # inside a doctype declaration
elif self._doctype is not None:
# parse doctype contents
if prefix == ">":
self._doctype = None
return
text = text.strip()
if not text:
return
self._doctype.append(text)
n = len(self._doctype)
if n > 2:
type = self._doctype[1]
if type == "PUBLIC" and n == 4:
name, type, pubid, system = self._doctype
elif type == "SYSTEM" and n == 3:
name, type, system = self._doctype
pubid = None
else:
return
if pubid:
pubid = pubid[1:-1]
if hasattr(self.target, "doctype"):
self.target.doctype(name, pubid, system[1:-1])
elif self.doctype is not self._XMLParser__doctype:
# warn about deprecated call
self._XMLParser__doctype(name, pubid, system[1:-1])
self.doctype(name, pubid, system[1:-1])
self._doctype = None
##
# (Deprecated) Handles a doctype declaration.
#
# @param name Doctype name.
# @param pubid Public identifier.
# @param system System identifier.
def doctype(self, name, pubid, system):
"""This method of XMLParser is deprecated."""
warnings.warn(
"This method of XMLParser is deprecated. Define doctype() "
"method on the TreeBuilder target.",
DeprecationWarning,
)
# sentinel, if doctype is redefined in a subclass
__doctype = doctype
##
# Feeds data to the parser.
#
# @param data Encoded data.
def feed(self, data):
try:
self._parser.Parse(data, 0)
except self._error, v:
self._raiseerror(v)
##
# Finishes feeding data to the parser.
#
# @return An element structure.
# @defreturn Element
def close(self):
try:
self._parser.Parse("", 1) # end of data
except self._error, v:
self._raiseerror(v)
tree = self.target.close()
del self.target, self._parser # get rid of circular references
return tree
# compatibility
XMLTreeBuilder = XMLParser
# workaround circular import.
try:
from ElementC14N import _serialize_c14n
_serialize["c14n"] = _serialize_c14n
except ImportError:
pass
|