new_contents: #!/usr/bin/env python
  
  """
  Prepares for running samples.
  It just generates maf.py and copies maf.py and waf to each sample directory.
  Please run this script before trying these samples.
  """
  
  import glob
  import os
  import shutil
  import subprocess
  
  if __name__ == '__main__':
      os.chdir('..')
      subprocess.check_call('./generate_maf.py')
      os.chdir('samples')
  
      for d in glob.glob('*/'):
          for f in '../maf.py', '../waf':
              shutil.copy(f, d)
  
subject: Add script to copy maf.py and waf