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https://github.com/SickGear/SickGear.git
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2a73990c82
Removes Levenshtein requirement with direct use of rapidfuzz instead Fallback to old fuzzywuzzy for pure python implementation
160 lines
4.9 KiB
Python
160 lines
4.9 KiB
Python
#!/usr/bin/env python
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from rapidfuzz.fuzz import (
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ratio as _ratio,
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partial_ratio as _partial_ratio,
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token_set_ratio as _token_set_ratio,
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token_sort_ratio as _token_sort_ratio,
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partial_token_set_ratio as _partial_token_set_ratio,
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partial_token_sort_ratio as _partial_token_sort_ratio,
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WRatio as _WRatio,
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QRatio as _QRatio,
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)
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from . import utils
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###########################
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# Basic Scoring Functions #
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###########################
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def _rapidfuzz_scorer(scorer, s1, s2, force_ascii, full_process):
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"""
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wrapper around rapidfuzz function to be compatible with the API of thefuzz
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"""
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if full_process:
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if s1 is None or s2 is None:
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return 0
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s1 = utils.full_process(s1, force_ascii=force_ascii)
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s2 = utils.full_process(s2, force_ascii=force_ascii)
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return int(round(scorer(s1, s2)))
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def ratio(s1, s2):
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return _rapidfuzz_scorer(_ratio, s1, s2, False, False)
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def partial_ratio(s1, s2):
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"""
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Return the ratio of the most similar substring
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as a number between 0 and 100.
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"""
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return _rapidfuzz_scorer(_partial_ratio, s1, s2, False, False)
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##############################
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# Advanced Scoring Functions #
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##############################
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# Sorted Token
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# find all alphanumeric tokens in the string
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# sort those tokens and take ratio of resulting joined strings
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# controls for unordered string elements
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def token_sort_ratio(s1, s2, force_ascii=True, full_process=True):
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"""
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Return a measure of the sequences' similarity between 0 and 100
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but sorting the token before comparing.
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"""
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return _rapidfuzz_scorer(_token_sort_ratio, s1, s2, force_ascii, full_process)
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def partial_token_sort_ratio(s1, s2, force_ascii=True, full_process=True):
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"""
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Return the ratio of the most similar substring as a number between
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0 and 100 but sorting the token before comparing.
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"""
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return _rapidfuzz_scorer(
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_partial_token_sort_ratio, s1, s2, force_ascii, full_process
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)
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def token_set_ratio(s1, s2, force_ascii=True, full_process=True):
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return _rapidfuzz_scorer(_token_set_ratio, s1, s2, force_ascii, full_process)
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def partial_token_set_ratio(s1, s2, force_ascii=True, full_process=True):
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return _rapidfuzz_scorer(
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_partial_token_set_ratio, s1, s2, force_ascii, full_process
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)
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###################
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# Combination API #
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###################
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# q is for quick
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def QRatio(s1, s2, force_ascii=True, full_process=True):
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"""
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Quick ratio comparison between two strings.
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Runs full_process from utils on both strings
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Short circuits if either of the strings is empty after processing.
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:param s1:
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:param s2:
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:param force_ascii: Allow only ASCII characters (Default: True)
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:full_process: Process inputs, used here to avoid double processing in extract functions (Default: True)
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:return: similarity ratio
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"""
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return _rapidfuzz_scorer(_QRatio, s1, s2, force_ascii, full_process)
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def UQRatio(s1, s2, full_process=True):
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"""
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Unicode quick ratio
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Calls QRatio with force_ascii set to False
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:param s1:
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:param s2:
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:return: similarity ratio
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"""
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return QRatio(s1, s2, force_ascii=False, full_process=full_process)
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# w is for weighted
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def WRatio(s1, s2, force_ascii=True, full_process=True):
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"""
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Return a measure of the sequences' similarity between 0 and 100, using different algorithms.
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**Steps in the order they occur**
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#. Run full_process from utils on both strings
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#. Short circuit if this makes either string empty
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#. Take the ratio of the two processed strings (fuzz.ratio)
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#. Run checks to compare the length of the strings
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* If one of the strings is more than 1.5 times as long as the other
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use partial_ratio comparisons - scale partial results by 0.9
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(this makes sure only full results can return 100)
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* If one of the strings is over 8 times as long as the other
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instead scale by 0.6
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#. Run the other ratio functions
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* if using partial ratio functions call partial_ratio,
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partial_token_sort_ratio and partial_token_set_ratio
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scale all of these by the ratio based on length
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* otherwise call token_sort_ratio and token_set_ratio
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* all token based comparisons are scaled by 0.95
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(on top of any partial scalars)
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#. Take the highest value from these results
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round it and return it as an integer.
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:param s1:
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:param s2:
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:param force_ascii: Allow only ascii characters
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:type force_ascii: bool
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:full_process: Process inputs, used here to avoid double processing in extract functions (Default: True)
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:return:
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"""
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return _rapidfuzz_scorer(_WRatio, s1, s2, force_ascii, full_process)
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def UWRatio(s1, s2, full_process=True):
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"""
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Return a measure of the sequences' similarity between 0 and 100,
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using different algorithms. Same as WRatio but preserving unicode.
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"""
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return WRatio(s1, s2, force_ascii=False, full_process=full_process)
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