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-rw-r--r--youtube_dl/compat.py18
1 files changed, 18 insertions, 0 deletions
diff --git a/youtube_dl/compat.py b/youtube_dl/compat.py
index 02abf8c1e..49e3c90e2 100644
--- a/youtube_dl/compat.py
+++ b/youtube_dl/compat.py
@@ -2529,6 +2529,24 @@ else:
el.text = el.text.decode('utf-8')
return doc
+if hasattr(etree, 'register_namespace'):
+ compat_etree_register_namespace = etree.register_namespace
+else:
+ def compat_etree_register_namespace(prefix, uri):
+ """Register a namespace prefix.
+ The registry is global, and any existing mapping for either the
+ given prefix or the namespace URI will be removed.
+ *prefix* is the namespace prefix, *uri* is a namespace uri. Tags and
+ attributes in this namespace will be serialized with prefix if possible.
+ ValueError is raised if prefix is reserved or is invalid.
+ """
+ if re.match(r"ns\d+$", prefix):
+ raise ValueError("Prefix format reserved for internal use")
+ for k, v in list(etree._namespace_map.items()):
+ if k == uri or v == prefix:
+ del etree._namespace_map[k]
+ etree._namespace_map[uri] = prefix
+
if sys.version_info < (2, 7):
# Here comes the crazy part: In 2.6, if the xpath is a unicode,
# .//node does not match if a node is a direct child of . !