__init__ ( self,  yfilename )

cell (
        self,
        a,
        b,
        c,
        alpha,
        beta,
        gamma,
        )

doneOne ( self )

run ( self )

sigma (
        self,
        a,
        b,
        c,
        alpha,
        beta,
        gamma,
        )

volume ( self,  volume )