def circuit_from_qasm_string(qasm_string,
name=None,
basis_gates="id,u0,u1,u2,u3,x,y,z,h,s,sdg,t,tdg,"
"rx,ry,rz,cx,cy,cz,ch,crz,cu1,cu3,swap,ccx,"
"cswap"):
"""Construct a quantum circuit from a qasm representation (string).
Args:
qasm_string (str): a string of qasm, or a filename containing qasm.
basis_gates (str): basis gates for the quantum circuit.
name (str or None): the name of the quantum circuit after loading
qasm text into it. If no name given, assign automatically.
Returns:
QuantumCircuit: circuit constructed from qasm.
Raises:
QISKitError: if the string is not valid QASM
"""
node_circuit = Qasm(data=qasm_string).parse()
unrolled_circuit = Unroller(node_circuit,
CircuitBackend(basis_gates.split(",")))
circuit_unrolled = unrolled_circuit.execute()
if name:
circuit_unrolled.name = name
return circuit_unrolled
def load_unroll_qasm_file(filename, basis_gates='u1,u2,u3,cx,id'):
"""Load qasm file and return unrolled circuit
Args:
filename (str): a string for the filename including its location.
basis_gates (str): basis to unroll circuit to.
Returns:
object: Returns a unrolled QuantumCircuit object
"""
# create Program object Node (AST)
node_circuit = qasm.Qasm(filename=filename).parse()
node_unroller = Unroller(node_circuit, CircuitBackend(basis_gates.split(",")))
circuit_unrolled = node_unroller.execute()
return circuit_unrolled
def load_qasm_string(qasm_string, name=None,
basis_gates="id,u0,u1,u2,u3,x,y,z,h,s,sdg,t,tdg,rx,ry,rz,"
"cx,cy,cz,ch,crz,cu1,cu3,swap,ccx,cswap"):
"""Construct a quantum circuit from a qasm representation (string).
Args:
qasm_string (str): a string of qasm, or a filename containing qasm.
basis_gates (str): basis gates for the quantum circuit.
name (str or None): the name of the quantum circuit after loading qasm
text into it. If no name given, assign automatically.
Returns:
QuantumCircuit: circuit constructed from qasm.
Raises:
QISKitError: if the string is not valid QASM
"""
node_circuit = Qasm(data=qasm_string).parse()
unrolled_circuit = Unroller(node_circuit, CircuitBackend(basis_gates.split(",")))
circuit_unrolled = unrolled_circuit.execute()
if name:
circuit_unrolled.name = name
return circuit_unrolled