def __init__(self, qpart):
        self._qpart = qpart

        self.width = self._DEFAULT_INDENT_WIDTH
        self.useTabs = self._DEFAULT_INDENT_USE_TABS

        self._smartIndenter = _getSmartIndenter('normal', self._qpart, self)
def getAp3(self):
        ret = math.acos(((self.getLenp1() * self.getLenp1() + self.getLenp2() * self.getLenp2()) - self.getLenp3() * self.getLenp3()) / (2* self.getLenp1() * self.getLenp2()))
        return ret