A simple python script to convert MapQuest's critical address file to OSM format. See http://wiki.openstreetmap.org/wiki/MapQuest/Critical_Addresses

caf2osm.py

#!/usr/bin/python

from csv import DictReader
from xml.sax.saxutils import escape
import sys

reader = DictReader(open(sys.argv[1], 'rU'))

def writeNode(out, node):
    out.write('<node id="%d" lat="%f" lon="%f">\n' % (node['id'], node['lat'], node['lon']))
    for (key, value) in node['tags'].items():
        if len(value) > 0:
            out.write('  <tag k="%s" v="%s" />\n' % (escape(key), escape(value)))
    out.write('</node>\n')

def writeNodes(filename, nodes):
    f = open(filename, 'w')
    f.write('<osm version="0.6" generator="caf2osm v0.1">\n')
    id = -1
    for node in nodes:
        writeNode(f, node)
    f.write('</osm>\n')

# Read in nodes from CSV
nodes = []
id = -1
for row in reader:
    tags = {}
    tags['addr:country'] = row['Country']
    if row['Country'] in ('US', 'CA'):
        tags['addr:state'] = row['State'].upper()
    else:
        tags['addr:state'] = row['State']
    tags['addr:city'] = row['City']
    tags['addr:full'] = row['Address']
    housenumber = row['Address Range Start']
    street = row['Address']

    if street.startswith(housenumber):
        tags['addr:street'] = street[len(housenumber):].strip()
    elif street.endswith(housenumber):
        tags['addr:street'] = street[:-len(housenumber)].strip()
    else:
        tags['addr:street'] = street

    tags['addr:housenumber'] = housenumber

    lat = float(row['Latitude']) / 1000000
    lon = float(row['Longitude']) / 1000000

    node = {'tags': tags,
            'lat': lat,
            'lon': lon,
            'id': id}

    nodes.append(node)

    id = id - 1

sortedlist = sorted(nodes, key=lambda elem: "%s %s" % (elem['tags']['addr:state'], elem['tags']['addr:city']))

filenum = 0
tnodes = []
for node in sortedlist:
    tnodes.append(node)

    if len(tnodes) > 99:
        writeNodes("caf-%03d.osm" % (filenum), tnodes)
        tnodes = []
        filenum = filenum + 1