How to find the similarity metric between two strings with Python?

Sometimes, we want to find the similarity metric between two strings with Python.

In this article, we’ll look at how to find the similarity metric between two strings with Python.

How to find the similarity metric between two strings with Python?

To find the similarity metric between two strings with Python, we use the difflib library.

For instance, we write

from difflib import SequenceMatcher

def similar(a, b):
    return SequenceMatcher(None, a, b).ratio()

s = similar("abc", "cba")

to create the similar function to return the similarity metric between 2 strings a and b.

In it, we create a SequenceMatcher object with the 2 strings and then call ratio to get the similarity value between them.

Then we call similar with 2 strings to get how similar they are.

Conclusion

To find the similarity metric between two strings with Python, we use the difflib library.