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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _resolve_capability(self, atom):
 """Return a terminal code for a capname or a sugary name, or an empty Unicode. The return value is always Unicode, because otherwise it is clumsy (especially in Python 3) to concatenate with real (Unicode) strings. """

        code = tigetstr(self._sugar.get(atom, atom))
        if code:
            # See the comment in ParametrizingString for why this is latin1.
            return code.decode('latin1')
        return u''