new_contents: import os
  import sys
  sys.path.append('../p4_hlir/')
  from p4_hlir.main import HLIR
  
  p4_source = sys.argv[1]
  absolute_source = os.path.join(os.getcwd(), p4_source)
  if not os.path.isfile(absolute_source):
      print "Source file '" + p4_source + \
            "' could not be opened or does not exist."
  
  hlir = HLIR(absolute_source)
  hlir.build()
subject: Read a P4 file and get its HLIR.