code: def _from_(self, who):
          
          try:
              host = who.split('@', 1)
              nickident = host[0].split('!', 1)
              nick = nickident[0]
              ident = nickident[1]
              host = host[1]
              return nick, ident, host
          except IndexError:
              return who, '', ''
docs: Processes nick!user@host data.
          Returns a tuple containing, the nick, user and host.
          If a valid hostmask isn't found, return the data as is.
          Required arguments:
          * who - nick!user@host data.