Learn Python 3 project: scrabble, allowing lowercase inputs

I am working on the scrabble project:https://www.codecademy.com/courses/learn-python-3/projects/scrabble

The last optional step is to " * make your letter_to_points dictionary able to handle lowercase inputs as well"

My proposed solution to this was to create a dictionary with key:value pairs with the lowercase letters and then merge that list with the original which contained all uppercase characters.

However my final bit of code:

letters_to_points = letters_to_points.update(lower_letters_to_points)

If i run


it returns none.

Iā€™m curious as to that is returning none, from my understand .update() can be used to merge two dictionaries.

Full code below:

letters = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"]
points = [1, 3, 3, 2, 1, 4, 2, 4, 1, 8, 5, 1, 3, 4, 1, 3, 10, 1, 1, 1, 1, 4, 4, 8, 4, 10]
#print(type(letters) is list)

def lower_the_letters(list_):
  list_lowered = []
  if type(list_) is list:
    for string in letters:
      list_lowered = 'NOT A LIST'
  return list_lowered

letters_to_points = {value:key for key, value in zip(points,letters)}

lower_letters_to_points = {value:key for key, value in zip(points,lower_the_letters(letters))}

letters_to_points = letters_to_points.update(lower_letters_to_points)

Like a few other similarly styled methods (e.g. append, extends and similar) this one is not designed to return anything. Instead it alters an existing dictionary-


That makes sense, thank you!

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