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How do I get the probability of a string being similar to another string in Python?
I want to get a decimal value like 0.9 (meaning 90%) etc. Preferably with standard Python and library.
e.g.
similar("Apple","Appel") #would have a high prob. similar("Apple","Mango") #would have a lower prob. 
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Hamming Distance, named after the American mathematician, is the simplest algorithm for calculating string similarity. It checks the similarity by comparing the changes in the number of positions between the two strings.
Comparing strings using the == and != The simplest way to check if two strings are equal in Python is to use the == operator. And if you are looking for the opposite, then != is what you need. That's it!
Abstract: String similarity search is a fundamental query that has been widely used for DNA sequencing, error-tolerant query autocompletion, and data cleaning needed in database, data warehouse, and data mining.
There is a built in.
from difflib import SequenceMatcher def similar(a, b): return SequenceMatcher(None, a, b).ratio() Using it:
>>> similar("Apple","Appel") 0.8 >>> similar("Apple","Mango") 0.0 I think maybe you are looking for an algorithm describing the distance between strings. Here are some you may refer to:
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