Superdense Coding qiskit

Superdense.py

# import all necessary objects and methods for quantum circuits
from qiskit import QuantumRegister, ClassicalRegister, QuantumCircuit, execute, Aer

all_pairs = ['00','01','10','11']

for pair in all_pairs:
    # Creating the circuit with two classical bits and 2 qbits
    qc = QuantumCircuit(2,2)
    # Creating the entangled state 
    qc.h(1)
    qc.cx(1,0)
    qc.barrier()
    # Alice applying Z,X gates depending on the 
    # message she needs to send.
    # Note : - Alice's qubit - q1
    if pair[0] == '1':
        qc.z(1)
    if pair[1] == '1':
        qc.x(1)
    qc.barrier()
    # Bob applying CNOT and H gate 
    # Note :- Bob's operation are always the same
    qc.cx(1,0)
    qc.h(1)
    qc.barrier()
    # Bob measure both qubits to retrieve the message
    qc.measure(0,0)
    qc.measure(1,1)
    display(qc.draw(output='mpl',reverse_bits=True))
    job = execute(qc,Aer.get_backend('qasm_simulator'),shots=1024)
    counts = job.result().get_counts(qc)
    print("Alice sent :",pair,"Bob received :",counts)