There are many ways to convert a specific XML dialect into JSON for easier consumption by Javascript code. This recipe works for some XML-based data, where the format is not really a document and html tags are used as field placeholders. You can use it as-is, but it is intended to serve as a starting point where you can plug your specific needs.
Python, 64 lines
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Copy to clipboard1 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 | from xml.parsers.expat import ParserCreate
class Xml2Json:
LIST_TAGS = ['COMMANDS']
def __init__(self, data = None):
self._parser = ParserCreate()
self._parser.StartElementHandler = self.start
self._parser.EndElementHandler = self.end
self._parser.CharacterDataHandler = self.data
self.result = None
if data:
self.feed(data)
self.close()
def feed(self, data):
self._stack = []
self._data = ''
self._parser.Parse(data, 0)
def close(self):
self._parser.Parse("", 1)
del self._parser
def start(self, tag, attrs):
assert attrs == {}
assert self._data.strip() == ''
print "START", repr(tag)
self._stack.append([tag])
self._data = ''
def end(self, tag):
print "END", repr(tag)
last_tag = self._stack.pop()
assert last_tag[0] == tag
if len(last_tag) == 1: #leaf
data = self._data
else:
if tag not in Xml2Json.LIST_TAGS:
# build a dict, repeating pairs get pushed into lists
data = {}
for k, v in last_tag[1:]:
if k not in data:
data[k] = v
else:
el = data[k]
if type(el) is not list:
data[k] = [el, v]
else:
el.append(v)
else: #force into a list
data = [{k:v} for k, v in last_tag[1:]]
if self._stack:
self._stack[-1].append((tag, data))
else:
self.result = {tag:data}
self._data = ''
def data(self, data):
self._data = data
# >>> Xml2Json('<doc><tag><subtag>data</subtag><t>data1</t><t>data2</t></tag></doc>').result
# {u'doc': {u'tag': {u'subtag': u'data', u't': [u'data1', u'data2']}}}
|
Hello,
I tried to run the code with command : python Xml2Json.py
I got error:
File "Xml2Json.py", line 63
Any one know how to use the code?
Thank you
The line starting with >>> is intended to demonstrate the usage of the class. I put it in a comment now so it doesn't break the python interpreter if you just download the file.
how can i parse an xml file using the xml2json function ?