old_contents: #! /usr/bin/python3
  
  import os
  import sys
  import utils
  import printer
  from run_cases import SimulationCase
  
  def main(argv):
      filenames,convert, = utils.cli_parser(argv)
      
      output_filename = filenames['output_filename']
      out = printer.Tee(output_filename, 'w')
      
      version = '0.0.1'
      print("This is CanSen, the SENKIN-like wrapper for Cantera, written in "
            "Python.\nVersion: {!s}\n".format(version))
  
      sim = SimulationCase(filenames,convert)
      sim.run_simulation()
      
      out.close()
      
  if __name__ == "__main__":
      main(sys.argv[1:])
  
  
  
new_contents: #! /usr/bin/python3
  
  # Standard libraries
  import os
  import sys
  import utils
  
  #Local imports
  from printer import Tee
  from run_cases import SimulationCase
  
  def main(argv):
      """The main driver function of CanSen."""
      __version__ = '0.0.1'
      
      # Parse the command line input
      filenames,convert, = utils.cli_parser(argv)
      
      # Open the text output file from the printer module
      output_filename = filenames['output_filename']
      out = Tee(output_filename, 'w')
      
      # Print version information to screen at the start of the problem
      print("This is CanSen, the SENKIN-like wrapper for Cantera, written in "
            "Python.\nVersion: {!s}\n".format(version))
  
      # Run the simulation
      sim = SimulationCase(filenames,convert)
      sim.run_simulation()
      
      # Clean up
      out.close()
      
  if __name__ == "__main__":
      main(sys.argv[1:])
  
  
  
subject: Add documentation to cansen.py