code: def format(table, field, fmt, **kwargs):
      
  
      conv = lambda v: fmt.format(v)
      return convert(table, field, conv, **kwargs)
docs: Convenience function to format all values in the given `field` using the
      `fmt` format string.
  
      The ``where`` keyword argument can be given with a callable or expression
      which is evaluated on each row and which should return True if the
      conversion should be applied on that row, else False.