78 lines
2.3 KiB
Python
78 lines
2.3 KiB
Python
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#!/usr/bin/env python
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# encoding: utf-8
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"""
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StringMatcher.py
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ported from python-Levenshtein
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[https://github.com/miohtama/python-Levenshtein]
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"""
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from Levenshtein import *
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from warnings import warn
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class StringMatcher:
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"""A SequenceMatcher-like class built on the top of Levenshtein"""
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def _reset_cache(self):
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self._ratio = self._distance = None
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self._opcodes = self._editops = self._matching_blocks = None
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def __init__(self, isjunk=None, seq1='', seq2=''):
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if isjunk:
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warn("isjunk not NOT implemented, it will be ignored")
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self._str1, self._str2 = seq1, seq2
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self._reset_cache()
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def set_seqs(self, seq1, seq2):
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self._str1, self._str2 = seq1, seq2
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self._reset_cache()
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def set_seq1(self, seq1):
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self._str1 = seq1
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self._reset_cache()
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def set_seq2(self, seq2):
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self._str2 = seq2
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self._reset_cache()
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def get_opcodes(self):
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if not self._opcodes:
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if self._editops:
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self._opcodes = opcodes(self._editops, self._str1, self._str2)
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else:
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self._opcodes = opcodes(self._str1, self._str2)
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return self._opcodes
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def get_editops(self):
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if not self._editops:
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if self._opcodes:
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self._editops = editops(self._opcodes, self._str1, self._str2)
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else:
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self._editops = editops(self._str1, self._str2)
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return self._editops
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def get_matching_blocks(self):
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if not self._matching_blocks:
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self._matching_blocks = matching_blocks(self.get_opcodes(),
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self._str1, self._str2)
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return self._matching_blocks
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def ratio(self):
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if not self._ratio:
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self._ratio = ratio(self._str1, self._str2)
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return self._ratio
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def quick_ratio(self):
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# This is usually quick enough :o)
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if not self._ratio:
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self._ratio = ratio(self._str1, self._str2)
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return self._ratio
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def real_quick_ratio(self):
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len1, len2 = len(self._str1), len(self._str2)
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return 2.0 * min(len1, len2) / (len1 + len2)
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def distance(self):
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if not self._distance:
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self._distance = distance(self._str1, self._str2)
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return self._distance
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