def Dup(self): newcomm = _mpi.comm_dup(self) return Intracomm(newcomm)
def Dup(self): newcomm = _mpi.comm_dup(self) return Graphcomm(newcomm)
def Clone(self): newcomm = _mpi.comm_dup(self) return type(self)(newcomm)
def Dup(self): newcomm = _mpi.comm_dup(self) return Cartcomm(newcomm)