old_contents: #!/usr/bin/python3
  
  import sys
  
  if not sys.version_info >= (3, 5):
      sys.stderr.write("Pegasus requires Python 3.5 or above\n")
      sys.exit(1)
  
  try:
      pass
  except:
      sys.stderr.write("Pegasus requires the Python3 YAML module to be installed\n")
      sys.exit(1)
  
new_contents: #!/usr/bin/python3
  
  import sys
  
  if not sys.version_info >= (3, 5):
      sys.stderr.write("Pegasus requires Python 3.5 or above\n")
      sys.exit(1)
  
  try:
      import yaml  # noqa
  except:
      sys.stderr.write("Pegasus requires the Python3 YAML module to be installed\n")
      sys.exit(1)
  
subject: Add noqa comment so unused import does not get removed by code lint steps