def get_output(self):
"""Returns the generated circuit."""
if not self._is_circuit_valid():
raise BackendError(
"Invalid circuit! Please check the syntax of your circuit."
"Has the Qasm parsing been called?. e.g: unroller.execute().")
return self.circuit
def start_gate(self,
name,
args,
qubits,
nested_scope=None,
extra_fields=None):
if self.listen and name not in self.basis \
and self.gates[name]["opaque"]:
raise BackendError("opaque gate %s not in basis" % name)
if self.listen and name in self.basis:
self.in_gate = name
self.listen = False
qubit_indices = [
self._qubit_order_internal.get(qubit) for qubit in qubits
]
gate_instruction = {
'name':
name,
# TODO: keep these real for now, until a later time
'params':
list(map(lambda x: float(x.real(nested_scope)), args)),
'texparams':
list(
map(lambda x: x.latex(prec=8, nested_scope=nested_scope),
args)),
'qubits':
qubit_indices,
}
if extra_fields is not None:
gate_instruction.update(extra_fields)
self.circuit['instructions'].append(gate_instruction)
self._add_condition()
def start_gate(self, op, qargs, extra_fields=None):
"""
Begin a custom gate.
Args:
op (Instruction): operation to apply to the dag.
qargs (list[QuantumRegister, int]): qubit arguments
extra_fields (dict): extra_fields used by non-standard instructions
for now (e.g. snapshot)
Raises:
BackendError: if using a non-basis opaque gate
"""
if not self.listen:
return
if op.name not in self.basis and self.gates[op.name]["opaque"]:
raise BackendError("opaque gate %s not in basis" % op.name)
if op.name in self.basis:
self.in_gate = op
self.listen = False
qubit_indices = [
self._qubit_order_internal.get((qubit[0].name, qubit[1]))
for qubit in qargs
]
clbit_indices = [
self._cbit_order_internal.get((cbit[0].name, cbit[1]))
for cbit in op.cargs
]
gate_instruction = {
'name': op.name,
'params': list(map(lambda x: x.evalf(), op.param)),
'texparams': list(map(sympy.latex, op.param)),
'qubits': qubit_indices,
'clbits': clbit_indices,
'memory': clbit_indices.copy()
}
if extra_fields is not None:
gate_instruction.update(extra_fields)
self.circuit['instructions'].append(gate_instruction)
self._add_condition()