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Make the consumer.py file executable by running the following command: 
chmod +x consumer.py
Run the consumer by executing the following command: 
./consumer.py
You should see output resembling this: 
Consumed event from topic purchases: key = awalther     value = batteries
Consumed event from topic purchases: key = awalther     value = gift card
Consumed event from topic purchases: key = awalther     value = book
Consumed event from topic purchases: key = htanaka      value = book
Consumed event from topic purchases: key = jbernard     value = alarm clock
Consumed event from topic purchases: key = eabara       value = gift card
Consumed event from topic purchases: key = jsmith       value = batteries
Consumed event from topic purchases: key = sgarcia      value = alarm clock
Consumed event from topic purchases: key = jsmith       value = book
Consumed event from topic purchases: key = sgarcia      value = alarm clock
Enter Ctrl-C to terminate the consumer application.
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