Python Practice › String Programs › Program 82
Similarity of two strings
Write a Python program to measure how similar two strings are.
Input
"Learning is fun in Sqatools", "Sqatools Online Learning Platform"
Output
Similarity: 0.4 Word overlap (Jaccard): 0.29
Approach
difflib.SequenceMatcherreturns a ratio from 0 (different) to 1 (identical).
Solution
from difflib import SequenceMatcher s1 = "Learning is fun in Sqatools"s2 = "Sqatools Online Learning Platform"ratio = SequenceMatcher(None, s1, s2).ratio()print("Similarity:", round(ratio, 2)) w1, w2 = set(s1.lower().split()), set(s2.lower().split())print("Word overlap (Jaccard):", round(len(w1 & w2) / len(w1 | w2), 2))Output
Similarity: 0.4 Word overlap (Jaccard): 0.29
Line by line
Line 5
The ratio compares matching blocks of characters.
Lines 8-9
A second measure compares shared words over all distinct words.
Note
Different similarity measures give different numbers, so state which one you use.
Learn the concept
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