How to run a qasm file on IBMQ device?

Question

I can find many qasm examples. How can I run them on different IBMQ devices?

Answer 1

This is a example for loading QASM, executing and displaying the result.

from qiskit import QuantumCircuit, Aer, execute

qasm_str = """OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
creg c[2];
h q[0];
cx q[0],q[1];
measure q -> c;
"""

# From str.
qc = QuantumCircuit.from_qasm_str(qasm_str)
# If you want to read from file, use instead
# qc = QuantumCircuit.from_qasm_file("/path/to/file.qasm")

# You can choose other backend also.
backend = Aer.get_backend("qasm_simulator")

# Execute the circuit and show the result.
job = execute(qc, backend)
result = job.result()
print(result.get_counts())

Answer 2

The easiest way is to use the QuantumCircuit methods QuantumCircuit.from_qasm_file() or QuantumCircuit.from_qasm_str() depending on if your loading the QASM from a file or Python string, respectively.

Answer 3

from qiskit import *
simulator = Aer.get_backend('qasm_simulator')