NLTK PortStemmer missing positional argument

Question

I have been experimenting with nltk, and I do not understand what my mistake is.`

I tried this:

from nltk.stem import PorterStemmer

stemmer = PorterStemmer
examples = ["cars", "eating", "quickly"]

for w in examples:
    print(stemmer.stem(w))

And Python returns this:

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

Could anyone explain to me what I am doing wrong? Thanks in advance!

You forgot to call the constructor: `stemmer = PorterStemmer()`. — DYZ, Feb 01 '19 at 16:07

score 0 · Accepted Answer · answered Feb 01 '19 at 16:10

Add () to PorterStemmer since it is a class instantiation and it should work:

from nltk.stem import PorterStemmer

stemmer = PorterStemmer()
examples = ["cars", "eating", "quickly"]

for w in examples:
    print(stemmer.stem(w))

stdout:

car
eat
quickli

NLTK PortStemmer missing positional argument

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