code: def tensor_up(pauli_sum: Union[PauliSum, PauliTerm], qubits: List[int]):
      
      return lifted_pauli(pauli_sum=pauli_sum, qubits=qubits)
docs: Takes a PauliSum object along with a list of
      qubits and returns a matrix corresponding the tensor representation of the
      object.
  
      This is the same as :py:func:`lifted_pauli`. Nick R originally wrote this functionality
      and really likes the name ``tensor_up``. Who can blame him?
  
      :param pauli_sum: Pauli representation of an operator
      :param qubits: list of qubits in the order they will be represented in the resultant matrix.
      :returns: matrix representation of the pauli_sum operator