[Tutor] finding common words using set.

[mhysnm1964 at gmail.com]

All,

 

 

I have created a function to find the common words within a list of strings.
I never get any results back of the common words and cannot understand why.
This is the first time I have delt with the set data methods and are trying
to understand how to use them.

 

def find_common_words(strings):

    # Split the strings into lists of words

    word_lists = [s.split() for s in strings]

    # Find the intersection of the sets of words

    common_words = set(word_lists[0]).intersection(*word_lists[1:])

    # Join the common words into a single string

    return ' '.join(common_words)

 

strings = ['apple orange banana', 'orange banana grape', 'banana mango']

common_words = find_common_words(strings)

print(common_words)

 

 

Should return banana orange and I get a null string. Any ideas why? 

 

Sean