[SOLVED] Matching strings within two lists

Issue

Here is the problem:
I want to define function which will compare string ratios using fuzzy.ration() within 2 lists (not same size).
It should return entities from list 1, which have at least one ratio bigger than 60 compared with second.

def Matching(list1, list2):
    no_matching = []
    matching = []
    for item1 in list1:    
        for item2 in list2:        
            m_score = fuzz.ratio(item1, item2)
        if m.score < 60:
            no_matching.append(item1)
        if m.score > 60:
            matching.append(item1)
    return(matching, no_matching)

The output is not what I aim for. Which part am I doing wrong – in order to get only the items from list 1 if they have at least one matching from list 2 bigger than 60.

For example:

list1 = ["Real Madrid", "Benfica", "Lazio", "FC Milan"]
list2 = ["Madrid", "Barcelona", "Milan"]

for item1 in list1:
    for item2 in list2:
        m_score = fuzz.ratio(item1, item2)
        print(item1, "&", item1, m_score)

Output is:

Real Madrid & Madrid 71 # greater than 60
Real Madrid & Barcelona 20
Real Madrid & Milan 12
Benfica & Madrid 15
Benfica & Barcelona 50
Benfica & Milan 17
Lazio & Madrid 36
Lazio & Barcelona 29
Lazio & Milan 20
FC Milan & Madrid 29
FC Milan & Barcelona 24
FC Milan & Milan 77 # greater than 60

The function output should be:

matching = ["Real Madrid", "FC Milan"] # since they have at least one ratio bigger than 60
no_matching = ["Benfica", "Lazio"]

Solution

There are duplicate combinations in list1 and list2 that created copies in the no_matching list. Check if the element is already in the matching list. If yes, don’t add to the no_matching list. The below code gives the expected output.

from fuzzywuzzy import fuzz

def Matching(list1, list2):
    no_matching = []
    matching = []
    m_score = 0
    for item1 in list1:    
        for item2 in list2:        
            m_score = fuzz.ratio(item1, item2)
            if m_score > 60:
                matching.append(item1)
        if m_score < 60 and not(item1 in matching):
            no_matching.append(item1)
    return(matching, no_matching)


list1 = ["Real Madrid", "Benfica", "Lazio", "FC Milan"]
list2 = ["Madrid", "Barcelona", "Milan"]
print(Matching(list1, list2))

Output:

(['Real Madrid', 'FC Milan'], ['Benfica', 'Lazio'])

Answered By – Kabilan Mohanraj

Answer Checked By – Terry (BugsFixing Volunteer)