fuzzy matching python

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

The example of this article is about Python using the BF algorithm to achieve keyword matching method. Share to everyone for your reference. The implementation methods are as follows: Copy Code code as follows: #!/usr/bin/python #-*-Coding:utf-8 # filename BF Import time """ T= "This are a big apple,this are a big apple,this are a big apple,this

)] Intersection= List (set (prefix) Set (Postfix))#get the same prefix ifintersection:returnLen (Intersection[0])#get the longest prefix returnodefKMP (T, p):#t:the string to check #P:patterni =0 whileI : Match=True forJinchRange (len (P)):ifT[I+J]! =P[j]: Match=False Break ifmatch:returnTrue#KMP ifj:i+ = J-PMT (P[:j])Else: i + = 1returnFalseThe above code reference http://cnblogs.com/goodspeed/p/3295456.htmlIn addition, there are BM algorithm, Sunday algorithm an

Re moduleThe RE module enables the Python language to have all the regular expression functionality.The compile function generates a regular expression object based on a pattern string and an optional flag parameter. The object has a series of methods for regular expression matching and substitution.The RE module also provides functions that are fully consistent with these methods, which use a pattern strin

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 directory and all subdirectories of the current d

To match the ' 56845037 ' and ' 59120585 ' in html =, try to use the regular:pattern_l = r‘‘‘The result is unsuccessful. Returned as NULL, useful: soup = BeautifulSoup(html, "lxml") print(soup.find_all(onclick="_gaq.push([‘_trackEvent‘,‘function‘, ‘onclick‘, ‘blog_articles_shangyipian‘]);location.href=‘/u012582664/article/details/(.+?)‘;")) Or return empty, ask you how to write, is where the problem Python string

:# @return A Booleandef isMatch (self, S, p):def compress (p):i = 0While I If p[i+1]! = ' * ':i = i + 1ContinueIf p[i+3] = = ' * ':If p[i] = = "." or p[i+2] = = ".":p = p[:i] + ". *" + p[i+4:]ContinueElif P[i] = = P[i+2]:p = p[:i] + p[i+2:]Continuei = i + 2Return Pdef ISMATCH2 (S, p):If Len (s) = = 0:If Len (p) = = 0:Return TrueIf Len (p)% 2 = = 0:i = 1While I If p[i]! = "*":Return Falsei = i + 2ElseReturn TrueElseReturn FalseIf Len (s) > 0 and len (p) = = 0:Return FalseMatch_char = p[0]Multi =

This article mainly introduces the KMP implementation method of the Python string matching algorithm. The example analyzes Python's skills related to string operations, which has some reference value, for more information about the Python String Matching Algorithm KMP, see the example in this article. Share it with you

In this paper, we describe the Python string matching algorithm kmp. Share to everyone for your reference. Specific as follows: #!/usr/bin/env Python#encoding:utf8def Next (pattern):p _len = Len (pattern) pos = [ -1]*p_lenj = -1for i in range (1, p_len): WH Ile J > 1 and pattern[j+1]! = Pattern[i]:j = Pos[j]if pattern[j+1] = = Pattern[i]:j = j + 1pos[i] = Jretu

Problem: m = Re.findall (' [0-9]*4[0-9]* ', ' [4] ')can match to 4.m = Re.findall (' ([0-9]) ([0-9]) * ', ' [4] ')Matches less than 4.What is this for? PS, this is a simplified description, I want to use a more complex than this, so to use (), to indicate a sequence of matching.To add, when I put it in notepad++, both types of writing can be matched, and I don't know why Python is out of the question. Answer: The Python's regular () matches, so th

._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

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.py Permission denied (PublicKey)Re. I Ignore

Below for you to share a Python greedy match and multi-line matching examples of interpretation, has a very good reference value, I hope to be helpful to everyone. Come and see it together. 1 Non-greedy flag >>> Re.findall (R "A (\d+)", "a23b") [' 2 ']>>> Re.findall (R "A (\d+)", "a23b") [' 23 '] Note to compare this situation: >>> Re.findall (R "A (\d+) b", "a23b") [']>>> Re.findall (R "A (\d+?) B "

#! /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

":" Deadly Magic "," image ":" Htt P://p0.meituan.net/movie/12/[emailprotected]_220h_1e_1c "," actor ":" Hugh Jackman, Christian Bale, Michael Caine "," Time ":" 2006-10-20 (United States) "," Score ":" 8.8 "," index ":" All "} {" title ":" Roman Holiday "," image ":" Http://p0.meituan.net/movie/23/[email protected]_220h_1e_1c "," actor ":" Gregory Peck, Audrey Hepburn Ben, Eddy Albert "," Time ":" 1953-09-02 (US) "," Score ":" 9.1 "," Index ":" 4 " } {"title": "Forrest Gump", "image": "Http://

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 letters. I wrote such a statement to deal with:

First up.Which is the logo mark,is the picture to be detected.The code is as follows.#coding =utf-8import cv2import scipy as Spimg1 = Cv2.imread (' x1.jpg ', 0) # QueryImageimg2 = Cv2.imread (' x2.jpg ', 0) # Trainim age# Initiate SIFT detectorsift = Cv2. SIFT () # Find the keypoints and descriptors with SIFTkp1, des1 = Sift.detectandcompute (img1,none) kp2, des2 = Sift.detectand Compute (img2,none) # FLANN parametersflann_index_kdtree = 0index_params = dict (algorithm = flann_index_kdtree, tree

Problem: m = Re.findall (' [0-9]*4[0-9]* ', ' [4] ')can match to 4.m = Re.findall (' ([0-9]) *4 ([0-9]) * ', ' [4] ')Match less than 4.What is this for? PS, this is a simplified description, I want to use a more complex than this, so to use (), to represent a sequence of matches.To add, when I put it in the notepad++, both of them could be matched, and I don't know why Python doesn't. Answer: Python's regular use () will match, so the return result

#-*-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

')5((1,'a', [3, 3]), {'y':'e','x': 1})1>>>defF (a,*b,**c):2...Print(a,b,c)3 ... 4>>> F ('s','s','s', s='s')5('s', ('s','s'), {'s':'s'})6>>>The second and third ' s ' above are collected into a tupleOnly keyword parameters (Python3 or more) can be used.1 def F (a,*b,c):2 ... Print (a,b,c) 3 4 >>> F (,'a', c=3)5' a') 31 def F (a,*, b,c):2 ... Print (a,b,c) 3 4 >>> F (1,b='a', c=3)5 1 a 3The first example of the keyword C after *b must be assigned using the C=3 equation methodThe second