lifted_gate does not guard against parameterised gates

[notmgsk]

lifted_gate does not guard against parameterised gates.

lifted_gate does not guard against parameterised gates.

In [6]: lifted_gate(Program("RX(%theta) 0")[0], 1)
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-6-b6c85b4cfc00> in <module>
----> 1 lifted_gate(Program("RX(%theta) 0")[0], 1)

~/hackery/python/pyquil/pyquil/unitary_tools.py in lifted_gate(gate, n_qubits)
    321                 raise TypeError("Unsupported gate modifier {}".format(mod))
    322
--> 323     matrix = _gate_matrix(gate)
    324
    325     return lifted_gate_matrix(matrix=matrix,

~/hackery/python/pyquil/pyquil/unitary_tools.py in _gate_matrix(gate)
    295         if len(gate.modifiers) == 0:         # base case
    296             if len(gate.params) > 0:
--> 297                 return QUANTUM_GATES[gate.name](*gate.params)
    298             else:
    299                 return QUANTUM_GATES[gate.name]

~/hackery/python/pyquil/pyquil/gate_matrices.py in RX(phi)
    105
    106 def RX(phi):
--> 107     return np.array([[np.cos(phi / 2.0), -1j * np.sin(phi / 2.0)],
    108                      [-1j * np.sin(phi / 2.0), np.cos(phi / 2.0)]])
    109

AttributeError: 'Div' object has no attribute 'cos'

[karalekas]

Closed by #1012