libsaria/xm.py

xm.py contains helpful xml parsing functions that we can use for
decoding last.fm requests.

libsaria/xm.py

@@ -0,0 +1,50 @@
+# Bryan Schumaker (10/24/2010)
+
+import xml.dom.minidom as xml
+
+def attributes(node):
+	attrs = dict()
+	for i in range(node.attributes.length):
+		item = node.attributes.item(i)
+		attrs[item.name] = item.nodeValue
+	return attrs
+
+
+def children(doc):
+	list = []
+	for node in doc.childNodes:
+		if node.nodeType == node.TEXT_NODE:
+			if node.data.strip() == "":
+				continue
+		list += [node]
+	return list
+
+
+def child(doc):
+	list = children(doc)
+	if len(list) > 0:
+		return list[0]
+	return None
+
+
+def get_elements(doc, tag):
+	return doc.getElementsByTagName(tag)
+
+
+def find_attribute(doc, tag, attr, value):
+	for node in get_elements(doc, tag):
+		if attributes(node)[attr] == value:
+			return node
+	return None
+
+
+def find_preferred_attribute(doc, tag, attr, values):
+	for value in values:
+		attr = find_attribute(doc, tag, attr, value)
+		if attr:
+			return attr
+	None
+
+
+def parse(xml_file):
+	return xml.parse(xml_file)