def volume(self):
        """Box volume in m^3."""
        return (self.x2 - self.x1) * (self.y2 - self.y1) * (self.z2 - self.z1)
def volume(self):
        """Box volume in m^3."""
        return (self.x2 - self.x1) * (self.y2 - self.y1) * (self.z2 - self.z1)
def volume ( self ) : return ( self . x2 - self . x1 ) * ( self . y2 - self . y1 ) * ( self . z2 - self . z1 )
Box volume in m^3.
Box volume in m^3 .