KeyError -read multiple lines

[MckJohan]

can you investigate below code. especially the value of ps, and the content on it. probably add some couple of print statement. KeyError should not be difficult to find out.

    # creating PorterStemmer object to 
    # take main stem of each word 
    ps = PorterStemmer()  
       
    # loop for stemming each word 
    # in string array at ith row     
    review = [ps.stem(word) for word in review 
                if not word in set(stopwords.words('english'))]  

you can try by adding

try:
    code here
except KeyError as e:
    print something here