get string similarity in Python with SequenceMatcher

string_similarity.py

from difflib import SequenceMatcher


def similarity(string1: str, string2: str) -> float:
    return SequenceMatcher(a=string1, b=string2).ratio()


def similarity_in_percent(string1: str, string2: str) -> float:
    value = similarity(string1, string2) * 100
    return round(value, 2)


print(similarity("João", "João"))  # > 1.0 String Iguais
print(similarity("João", "JOÃO"))  # > 0.25 Maiúsculas e Minúsculas contam
print(similarity("João", "Pedro"))  # > 0.2222222222222222

# Convertendo em percentual e cortando as casas decimais
print(similarity_in_percent("João", "João"))  # > 100.0% Iguais
print(similarity_in_percent("João", "JOÃO"))  # > 25% Iguais
print(similarity_in_percent("João", "Pedro"))  # > 22.22% Iguais