python fuzzy string matching

In this paper, we describe the method of Python matching by BF algorithm. Share to everyone for your reference. The implementation method is as follows: The code is as follows: #!/usr/bin/python#-*-Coding:utf-8# filename BFImport time"""T= "A big apple,this is a big apple,this are a big apple,this is a Big Apple."p= "Apple""""T= "Why is it called a vector space

=count+1 Else I=i+1 J=0 Print Count Print Time.time ()-start Algorithm idea: The target string T and the pattern string p are compared to each other, if corresponding bit match, then carries on the next comparison; if not the same, p shifts 1 digits to the right, starting from the 1th digit of p. Algorithm features: The overall moving direction: it can be considered that in a fixed case, p sliding

python Regular expression-RE module 1. FindAll function >>> Import re >>> s= ' 123abc456eabc789 ' >>> Re.findall (R ' ABC ', s) results: [' abc ', ' ABC '] The return result is a list with a rule-compliant string in the middle and an empty list if no strings that match the rules are found. 2. Compile function >>> s= ' 111,222,aaa,bbb,ccc333,444ddd123abc456eabc789 ' >>> rule=r ' \b\d+\b ' >>> compiled_ru

Python implementation of a directory and its subdirectories looking for matching filesPython looks for matching files in the directory and its subdirectories, which is a little exerciseThe topics are as follows: (1) Write a program that can find the file name containing the specified string in the current dire

#-*-Coding:utf8-*-‘‘‘https://oj.leetcode.com/problems/regular-expression-matching/Implement regular expression matching with support for '. ' and ' * '.‘.‘ Matches any single character.' * ' Matches zero or more of the preceding element.The matching should cover the entire input string (not partial).The function protot

index1,char[] Chp,int index2) { if (index2>=chp.length) return index1>= Chs.length; if (index2+1C Language Source code (spents 21ms):BOOL IsMatch (char* S, char* p) { if (S==null | | p==null) return false; if (!*p) return!*s; if (* (p+1) = = ' * ') {while ((*p==*s) | | | (*s *p== '. ')) { if (IsMatch (s,p+2)) return true; s++; } Return IsMatch (s,p+2); } else if ((*p==*s) | | | (*s *p== '. ')) { return IsMatch (s+1,p+

._argument_weights.append (CONV obj.weight) Self.arguments.add (str (variable)) index= index + 1_build_regex (domain_rule) regex_parts.append ('\\|') Self._trace.append (False,'|')) _build_regex (Self.is_leaf andSelf.ruleorSelf.rule.rstrip ('/')) if notself.is_leaf:self._trace.append (False,'/')) ifself.build_only:returnRegex= R'^%s%s$'%(U"'. Join (Regex_parts), ( notSelf.is_leafor notSelf.strict_slashes) and '( ? ' or "') Self._regex= Re.compile (regex, re. UNICODE)En

#! /Usr/bin/python #-*-coding: UTF-8 # filename BFimport time "t =" this is a big apple, this is a big apple, this is a big apple, this is a big apple. "p =" apple "t =" Why is vector space model? In fact, we can regard each word as a dimension, and the word frequency as its value (directed), that is, vector, in this way, the word and frequency of each article constitute an I-dimensional spatial graph. The similarity between the two documents is the c

A simple use of re.search to match a keyword in a string[Email protected] ~]# vim ceshi.py#!/usr/bin/env python#coding:utf-8import reerr= ("stderr: ' Permission denied (PublicKey) fatal:could not read from remote Repository ") Matchpro = Re.search (R ' Permission denied \ (publickey\) ', err, re. M|re. I) Print Matchpro.group ()[email protected] ~]# python ceshi.

A small program is being written Miniblogs updater, you need to calculate the number of words entered by the user. Because the length of the Chinese-English character encoding is different, if you use the Len () function in Python, it calculates the actual length of the string, and a Chinese character is not equivalent to an English letter. Therefore, the Chinese characters need to be treated as English let

#-*-Coding:utf-8-*-ImportImportReload()(' Utf-8 ')= [() forinch[' This '' That ']] # compiles a list of matching template objects that match the template compilation source from a two-tuple list= ' Does This text match the pattern? 'Print' Test: '"' forinch: # Find each Template object Print' seeking '%s '--'% if(): # Searchreturns the first object found,empty if not found Print"Match"()Else: Print"no match"() Print() # F

Python original string and Unicode string operator usage Example Analysis, pythonunicode This document describes the usage of the original Python string and Unicode string operators. We will share this with you for your reference.

This article focuses on Python Cookbook (string and text) for text-matching operations at the beginning or end of a string, involving Python using Str.startswith () and Str.endswith () Method for the start or end of a string speci

(R ' [;, \s]\s* ', line) print (parts) # ( b) using the capture group in the regular expression pattern, be aware that the capturing group is enclosed in parentheses, using capturing groups to cause matching text to also be included in the final result in fields = Re.split (R ' (; |,|\s) \s* ', line) print (fields) # (c) Improves the output of the string according to the separator character above values =