code: def handle_apply(args):
      
  
      python_version = args['--python-version']
      if python_version is None:
          python_version = "{}.{}".format(sys.version_info.major,
                                          sys.version_info.minor)
  
      apply_mutation(
          Path(args['<module-path>']),
          cosmic_ray.plugins.get_operator(args['<operator>'])(python_version),
          int(args['<occurrence>']))
  
      return ExitCode.OK
docs: usage: {program} apply <module-path> <operator> <occurrence>
  
      Apply the specified mutation to the files on disk. This is primarily a debugging
      tool.
  
      options:
        --python-version=VERSION  Python major.minor version (e.g. 3.6) of the code being mutated.