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result = execute(circuit, backend=simulator)
plot_histogram(result.get_counts(circuit))

I used the above code to plot a histogram for a simple entanglement circuit. I got the error mentioned below. I am running the code in google collab.

AttributeError: 'AerJob' object has no attribute 'get_counts'

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This should fix your problem:

result = execute(circuit, backend=simulator).result()
plot_histogram(result.get_counts(circuit))
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  • $\begingroup$ Yes, this one fixed the problem too. $\endgroup$ – Rishwi binnu Sep 10 '19 at 16:01
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Execute returns a job instance. The job has a result, job.result(), and you get counts from the results, ie job.result().get_counts()

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I solved this problem by modifying the code to ...

counts=result.get_counts(circuit)
plot_histogram(counts)

When I am using a variable counts to store the output, I am able to plot it but unable to execute the code in the question. Entire code goes like this...

from qiskit import *
from qiskit.tools.visualization import plot_histogram
circuit.h(qr[0])
circuit.cx(qr[0], qr[1])
circuit.measure(qr,cr)
circuit.draw(output='mpl')
simulator = Aer.get_backend('qasm_simulator')
result = execute(circuit, backend=simulator)
counts=result.get_counts(circuit)
plot_histogram(counts)
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