old_contents: from os import chmod, unlink, stat, makedirs
  from os.path import isfile, split, exists
  from shutil import copyfile
  
  def move_verify_delete(in_file, out_file):
      '''
      Moves in_file to out_file, verifies that the filesizes are the same and
      then does a chmod 666
      '''
      if not exists(split(out_file)[0]):
          makedirs(split(out_file)[0])
              
      if isfile(in_file) and not isfile(out_file):
          orig_file_size = stat(in_file).st_size
          copyfile(in_file, out_file)
          new_file_size = stat(out_file).st_size
          
          if new_file_size != orig_file_size:
              raise Exception('File Transfer Error! %s:%d -> %s:%d'%(in_file, orig_file_size, out_file, new_file_size))
          
          unlink(in_file)
          #chmod(out_file, 666)
      else:
          
          raise Exception('File Transfer Error! %s EXISTS %s %s EXISTS %s'%(in_file,
                                                                            isfile(in_file),
                                                                            out_file,
                                                                            isfile(out_file)))
new_contents: from os import chmod, unlink, stat, makedirs
  from os.path import isfile, split, exists
  from shutil import copyfile
  
  def move_verify_delete(in_file, out_file, overwrite=False):
      '''
      Moves in_file to out_file, verifies that the filesizes are the same and
      then does a chmod 666
      '''
      if not exists(split(out_file)[0]):
          makedirs(split(out_file)[0])
              
      if isfile(in_file) and (overwrite or not isfile(out_file)):
          orig_file_size = stat(in_file).st_size
          copyfile(in_file, out_file)
          new_file_size = stat(out_file).st_size
          
          if new_file_size != orig_file_size:
              raise Exception('File Transfer Error! %s:%d -> %s:%d'%(in_file, orig_file_size, out_file, new_file_size))
          
          unlink(in_file)
          #chmod(out_file, 666)
      else:
          
          raise Exception('File Transfer Error! %s EXISTS %s %s EXISTS %s'%(in_file,
                                                                            isfile(in_file),
                                                                            out_file,
                                                                            isfile(out_file)))
subject: Add in overwrite output file