old_contents: import os
  
  from NextBus import NextBus
  
  ### MAIN FUNCTION	
  
  # data directory
  sDirectory = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'data/')
  
  # MBTA information
  sAgency = "mbta"
  lLines = ['1', '83']
  
  # instantiate a NextBus object
  MBTA = NextBus(sDirectory, sAgency)
  
  # iteratively poll for route predictions
  for sLineID in lLines:
      MBTA.poll(sLineID)
      print MBTA.lines[sLineID]
  
  exit()
new_contents: import os
  
  from NextBus import NextBus
  
  ### MAIN FUNCTION	
  
  # data directory
  sDirectory = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'data/')
  
  # MBTA information
  sAgency = "mbta"
  lLines = ['1', '83']
  
  # instantiate a NextBus object
  MBTA = NextBus(sAgency, sDirectory)
  
  # iteratively poll for route predictions
  for sLineID in lLines:
      MBTA.poll(sLineID)
      print MBTA.lines[sLineID]
  
  exit()
subject: Update NextBus instantiation in test file