Add helper function find_path_attr

This commit is contained in:
Philipp Hagemeister 2013-07-11 16:12:08 +02:00
parent 690e872c51
commit 59ae56fad5
2 changed files with 29 additions and 0 deletions

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@ -4,6 +4,7 @@
import sys import sys
import unittest import unittest
import xml.etree.ElementTree
# Allow direct execution # Allow direct execution
import os import os
@ -16,6 +17,7 @@ from youtube_dl.utils import unescapeHTML
from youtube_dl.utils import orderedSet from youtube_dl.utils import orderedSet
from youtube_dl.utils import DateRange from youtube_dl.utils import DateRange
from youtube_dl.utils import unified_strdate from youtube_dl.utils import unified_strdate
from youtube_dl.utils import find_xpath_attr
if sys.version_info < (3, 0): if sys.version_info < (3, 0):
_compat_str = lambda b: b.decode('unicode-escape') _compat_str = lambda b: b.decode('unicode-escape')
@ -112,5 +114,18 @@ class TestUtil(unittest.TestCase):
self.assertEqual(unified_strdate('Dec 14, 2012'), '20121214') self.assertEqual(unified_strdate('Dec 14, 2012'), '20121214')
self.assertEqual(unified_strdate('2012/10/11 01:56:38 +0000'), '20121011') self.assertEqual(unified_strdate('2012/10/11 01:56:38 +0000'), '20121011')
def test_find_xpath_attr(self):
testxml = u'''<root>
<node/>
<node x="a"/>
<node x="a" y="c" />
<node x="b" y="d" />
</root>'''
doc = xml.etree.ElementTree.fromstring(testxml)
self.assertEqual(find_xpath_attr(doc, './/fourohfour', 'n', 'v'), None)
self.assertEqual(find_xpath_attr(doc, './/node', 'x', 'a'), doc[1])
self.assertEqual(find_xpath_attr(doc, './/node', 'y', 'c'), doc[2])
if __name__ == '__main__': if __name__ == '__main__':
unittest.main() unittest.main()

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@ -198,6 +198,20 @@ else:
with open(fn, 'w', encoding='utf-8') as f: with open(fn, 'w', encoding='utf-8') as f:
json.dump(obj, f) json.dump(obj, f)
if sys.version_info >= (2,7):
def find_xpath_attr(node, xpath, key, val):
""" Find the xpath xpath[@key=val] """
assert re.match(r'^[a-z]+$', key)
assert re.match(r'^[a-z]*$', val)
expr = xpath + u"[@%s='%s']" % (key, val)
return node.find(expr)
else:
def find_xpath_attr(node, xpath, key, val):
for f in node.findall(xpath):
if f.attrib.get(key) == val:
return f
return None
def htmlentity_transform(matchobj): def htmlentity_transform(matchobj):
"""Transforms an HTML entity to a character. """Transforms an HTML entity to a character.