MQTT message from csv file

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I have a csv file and I need to send this file as a MQTT message, but I need it to sending just by one line with a few seconds of break and then next line and again a few sec break. It's something like sensor simulation but with data in csv file. I've tried to solve it in several different ways but nothing worked. I'm coding in Python. Thank you guys for any help.

def MQTT_publish():
  client = mqtt.Client()
  reader = csv.reader(file)
  print("Connecting to broker", broker)
  client.connect(broker)
  client.loop_start()
  print("Publishing...")
  for row in reader:
    for e in row:
        client.publish(f"{topic}", str(e))
  time.sleep(10)

  client.loop_stop()


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