Quick and dirty pastebin interface in Pyhton

pastebin.py

import urllib

valid_expiration_values = ('N', '10M', '1H', '1D', '1M')

def postToPastebin(     message,
        title = "RTBot",
        subdomain = "rtbot",
        expire_date = "1D",
        format = "text"):
  
  if expire_date not in valid_expiration_values:
    raise Exception("invalid expire_date (must be one of %r, got %r instead)" % (valid_expiration_values, expire_date))
  
  request_dict = {      "paste_code":   message,
        "paste_name":   title,
        "paste_subdomain":      subdomain,
        "paste_expire_date":    expire_date,
        "paste_format": format }
  request = urllib.urlencode(request_dict)
  result = urllib.urlopen("http://pastebin.com/api_public.php", request)
  return result.read() #either an error message or a pastebin url

Another piece of source code written to be best seen with elastic tabstops.