.format() can be made even more legible for other people reading your code by including keywords. Previously, with .format(), you had to make sure that your variables appeared as arguments in the same order that you wanted them to appear in the string, which added unnecessary complications when writing code.

By including keywords in the string, and in the arguments, you can remove that ambiguity. Let’s look at an example.

def favorite_song_statement(song, artist):
  return "My favorite song is {song} by {artist}.".format(song=song, artist=artist)

Now it is clear to anyone reading the string what it is supposed to return, they don’t even need to look at the arguments of .format() in order to get a clear understanding of what is supposed to happen. You can even reverse the order of artist and song in the code above and it will work the same way.

For example, if the arguments of .format() are in a different order, the code will still work since the keywords are present:

def favorite_song_statement(song, artist):
  # this will have the same output as the above example
  return "My favorite song is {song} by {artist}.".format(artist=artist, song=song)

This makes writing AND reading the code much easier.