what is missing parameter in the below mentioned program?

Question

For the below-mentioned python program it is displaying an error

from nltk.stem import PorterStemmer 
ps=PorterStemmer
words = ["program", "programs", "programer", "programing", "programers"]
for w in words: 
    print(w, " : ", ps.stem(w)) 

TypeError: stem() missing 1 required positional argument: 'word'

I'm not able to find out the missing parameter. What is that parameter?

Answer 1

You need to instantiate the PorterStemmer class, not use it directly.

This:

ps=PorterStemmer

needs to become this:

ps = PorterStemmer()

More on the matter here.

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