Hello, can anybody convert python code that read openstreetmap xml file from
http://github.com/rory/python-osm/blob/master/pyosm.py
i try to translate but with the lack of knowledge of python , never get it done. Even approximate conversion that will be greate.
#! /usr/bin/python
import xml.sax
class Node(object):
def __init__(self, id=None, lon=None, lat=None, tags=None):
self.id = id
self.lon, self.lat = lon, lat
if tags:
self.tags = tags
else:
self.tags = {}
def __repr__(self):
return "Node(id=%r, lon=%r, lat=%r, tags=%r)" % (self.id, self.lon, self.lat, self.tags)
class Way(object):
def __init__(self, id, nodes=None, tags=None):
self.id = id
if nodes:
self.nodes = nodes
else:
self.nodes = []
if tags:
self.tags = tags
else:
self.tags = {}
def __repr__(self):
return "Way(id=%r, nodes=%r, tags=%r)" % (self.id, self.nodes, self.tags)
class NodePlaceHolder(object):
def __init__(self, id):
self.id = id
def __repr__(self):
return "NodePlaceHolder(id=%r)" % (self.id)
class OSMXMLFile(object):
def __init__(self, filename):
self.filename = filename
self.nodes = {}
self.ways = {}
self.__parse()
print repr(self.ways)
def __parse(self):
"""Parse the given XML file"""
parser = xml.sax.make_parser()
parser.setContentHandler(OSMXMLFileParser(self))
parser.parse(self.filename)
# now fix up all the refereneces
for way in self.ways.values():
way.nodes = [self.nodes[node_pl.id] for node_pl in way.nodes]
# convert them back to lists
self.nodes = self.nodes.values()
self.ways = self.ways.values()
class OSMXMLFileParser(xml.sax.ContentHandler):
def __init__(self, containing_obj):
self.containing_obj = containing_obj
self.curr_node = None
self.curr_way = None
def startElement(self, name, attrs):
#print "Start of node " + name
if name == 'node':
self.curr_node = Node(id=attrs['id'], lon=attrs['lon'], lat=attrs['lat'])
elif name == 'way':
#self.containing_obj.ways.append(Way())
self.curr_way = Way(id=attrs['id'])
elif name == 'tag':
#assert not self.curr_node and not self.curr_way, "curr_node (%r) and curr_way (%r) are both non-None" % (self.curr_node, self.curr_way)
if self.curr_node:
self.curr_node.tags[attrs['k']] = attrs['v']
elif self.curr_way:
self.curr_way.tags[attrs['k']] = attrs['v']
elif name == "nd":
assert self.curr_node is None, "curr_node (%r) is non-none" % (self.curr_node)
assert self.curr_way is not None, "curr_way is None"
self.curr_way.nodes.append(NodePlaceHolder(id=attrs['ref']))
def endElement(self, name):
#print "End of node " + name
#assert not self.curr_node and not self.curr_way, "curr_node (%r) and curr_way (%r) are both non-None" % (self.curr_node, self.curr_way)
if name == "node":
self.containing_obj.nodes[self.curr_node.id] = self.curr_node
self.curr_node = None
elif name == "way":
self.containing_obj.ways[self.curr_way.id] = self.curr_way
self.curr_way = None
if __name__ == '__main__':
osm = OSMXMLFile("./lucan.osm.xml")
thanks