I need to make a function that takes a body of text and outputs a list of all unique words in the text. The output list will contain strings

Question

Here is what I got. It is not working when I run it. Can someone help guide me on what is wrong with my code?

def unique_words(text : str) ->list:
  text = open(text, 'r')
  text_contents = text.read()
  text.close()
  word_list = text_contents.split()

word = open(str, 'w')
unique = []
for word in word_list:
    if word not in word_list:
        file.append(str(word) + "\n")

unique.sort()

return(unique)

Here is my code

Answer 1

Set will hold all unique values. If you add duplicate, then the set will ignore it.

word_list = ['hello', 'hello', 'world', 'world']

unique = set()
for word in word_list:
    if word not in unique:
        unique.add(word)
print(unique)