[exchange] Caching error

[Stefano Rivera]

This looks wrong:
23:28 <tumbleweed> exchange 20 ZAR to NAD
23:28 <tibid> I'm not feeling too well

2009-07-07 21:28:50,784 ERROR core.dispatcher: Exception occured in Currency processor of lookup plugin
Traceback (most recent call last):
  File "/home/stefanor/projects/ibid/tibid/ibid/core.py", line 25, in _process
    processor.process(event)
  File "/home/stefanor/projects/ibid/tibid/ibid/plugins/__init__.py", line 55, in process
    method(event, *match.groups())
  File "/home/stefanor/projects/ibid/tibid/ibid/plugins/lookup.py", line 493, in exchange
    self.country_codes = get_country_codes()
  File "/home/stefanor/projects/ibid/tibid/ibid/plugins/lookup.py", line 29, in get_country_codes
    etree = get_html_parse_tree('file://' + filename, treetype='etree')
  File "/home/stefanor/projects/ibid/tibid/ibid/utils.py", line 132, in get_html_parse_tree
    f = urllib2.urlopen(req)
  File "/usr/lib/python2.5/urllib2.py", line 124, in urlopen
    return _opener.open(url, data)
  File "/usr/lib/python2.5/urllib2.py", line 381, in open
    response = self._open(req, data)
  File "/usr/lib/python2.5/urllib2.py", line 399, in _open
    '_open', req)
  File "/usr/lib/python2.5/urllib2.py", line 360, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.5/urllib2.py", line 1203, in file_open
    return self.open_local_file(req)
  File "/usr/lib/python2.5/urllib2.py", line 1223, in open_local_file
    stats = os.stat(localfile)
OSError: [Errno 2] No such file or directory: '/lookup/iso-3166-1_decoding_table.htm'