no.py

import urlparse
host = 'http://example.com'
endpoint = 'endpoint'
thing_id = 226

print "naive urljoin: ", urlparse.urljoin(host, endpoint, thing_id)
print "less naive urljoin: ", urlparse.urljoin(urlparse.urljoin(host, endpoint), str(thing_id))
print "ugly working urljoin: ", urlparse.urljoin(host, "%s/%s" % (endpoint, thing_id))

"""
naive urljoin:  http://example.com/endpoint
less naive urljoin:  http://example.com/226
ugly working urljoin:  http://example.com/endpoint/226
"""