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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def is_http_running_on(port):
 """ Check if an http server runs on a given port. Args: The port to check. Returns: True if it is used by an http server. False otherwise. """

  try:
    conn = httplib.HTTPConnection('127.0.0.1:' + str(port))
    conn.connect()
    conn.close()
    return True
  except Exception:
    return False