def __init__(self, chord):
        """ Constructor of Chord instance

        :param str chord: Name of chord.
        """
        self._chord = chord
        self._root, self._quality, self._appended, self._on = "", "", "", ""
        self._parse(chord)
def __init__ ( self , chord ) : self . _chord = chord self . _root , self . _quality , self . _appended , self . _on = "" , "" , "" , "" self . _parse ( chord )
Constructor of Chord instance

        :param str chord: Name of chord.