old_contents: #! /usr/bin/env python
  # Brokers communication between Dakota and SWASH through files.
  #
  # Arguments:
  #   $1 is 'params.in' from Dakota
  #   $2 is 'results.out' returned to Dakota
  
  import sys
  import os
  import shutil
  from subprocess import call
  
  
  def driver():
      """Broker communication between Dakota and SWASH through files."""
  
      # Files and directories.
      start_dir = os.path.dirname(os.path.realpath(__file__))
      input_file = 'INPUT'
      input_template = input_file + '.template'    
      output_file = 'bot07.mat'
      output_file_var = 'Botlev'
      data_file = 'sand.bot'
      run_script = 'run_swash.sh'
  
      # Use `dprepro` (from $DAKOTA_DIR/bin) to substitute parameter
      # values from Dakota into the SWASH input template, creating a new
      # SWASH input file.
      shutil.copy(os.path.join(start_dir, input_template), os.curdir)
      call(['dprepro', sys.argv[1], input_template, input_file])
  
      # Copy the data file into the active directory.
      shutil.copy(os.path.join(start_dir, data_file), os.curdir)
  
      # Call SWASH through a PBS submission script. Note that `qsub`
      # returns immediately, so jobs do not block.
      job_name = 'SWASH-Dakota' + os.path.splitext(os.getcwd())[-1]
      call(['qsub', '-N', job_name, os.path.join(start_dir, run_script)])
  
      # Provide a dummy results file to advance Dakota.
      with open(sys.argv[2], 'w') as fp:
          fp.write('0.0\n1.0\n')
  
  if __name__ == '__main__':
      driver()
  
new_contents: #! /usr/bin/env python
  # Brokers communication between Dakota and SWASH through files.
  #
  # Arguments:
  #   $1 is 'params.in' from Dakota
  #   $2 is 'results.out' returned to Dakota
  
  import sys
  import os
  import shutil
  from subprocess import call
  
  
  def driver():
      """Broker communication between Dakota and SWASH through files."""
  
      # Files and directories.
      start_dir = os.path.dirname(os.path.realpath(__file__))
      input_file = 'INPUT'
      input_template = input_file + '.template'
      data_file = 'sand.bot'
      run_script = 'run_swash.sh'
  
      # Use `dprepro` (from $DAKOTA_DIR/bin) to substitute parameter
      # values from Dakota into the SWASH input template, creating a new
      # SWASH input file.
      shutil.copy(os.path.join(start_dir, input_template), os.curdir)
      call(['dprepro', sys.argv[1], input_template, input_file])
  
      # Copy the data file into the active directory.
      shutil.copy(os.path.join(start_dir, data_file), os.curdir)
  
      # Call SWASH through a PBS submission script. Note that `qsub`
      # returns immediately, so jobs do not block.
      job_name = 'SWASH-Dakota' + os.path.splitext(os.getcwd())[-1]
      call(['qsub', '-N', job_name, os.path.join(start_dir, run_script)])
  
      # Provide a dummy results file to advance Dakota.
      with open(sys.argv[2], 'w') as fp:
          fp.write('0.0\n1.0\n')
  
  
  if __name__ == '__main__':
      driver()
  
subject: Remove unused variables