code: def touch(fname, times=None):
      '''
      Emulates the UNIX touch command.
      '''
      with io.open(fname, 'a'):
          os.utime(fname, timesf touch(fname, times=None):
      '''
      Emulates the UNIX touch command.
      '''
      with io.open(fname, 'a'):
          os.utime(fname, times)
docs: Emulates the UNIX touch command.