def getOption(self, name):
    """
    Get the the Option object associated with the given name.

    :param name: the name of the option to retrieve; can be short or long name.
    :raise InterfaceException: if the named option doesn't exist.
    """
    name = name.strip()
    for o in self.options:
      if o.short == name or o.long == name:
        return o
    raise InterfaceException("No such option: " + name)