Created
August 6, 2019 20:37
-
-
Save MaxLarue/a05c29157e25df5698fa49185bc94f79 to your computer and use it in GitHub Desktop.
string matching
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| def histogram_match(reference, input): | |
| reference_histogram = defaultdict(int) | |
| input_histogram = defaultdict(int) | |
| for letter in reference.lower(): | |
| reference_histogram[letter] += 1 | |
| for letter in input.lower(): | |
| input_histogram[letter] += 1 | |
| mismatch = 0 | |
| for letter in reference.lower(): | |
| mismatch += min(abs(max(reference_histogram[letter] - input_histogram[letter], 0)), reference_histogram[letter]) | |
| # worst mismatch is the number of letters in reference string | |
| # best mismatch is 0 | |
| worst = float(len(reference)) | |
| return max(((worst - float(mismatch)) / worst) * 100, 0.0) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment