python regex match vs search

#导入正则模块import reauth="no_shutdown_"‘‘‘分析日志的模块，查找日志中标志性信息产生的次数‘‘‘#定义你需要查找的对象的正则表达式wordcheck#需要分析的日志的路径filesourcedef checklog(wordcheck,filesource): #定义一个空的字典用来存放查询的结果 size={} #异常捕获当文件不存在的时候抛出异常 try: #打开日志文件 file=open(filesource,"r") #循环读取日志文件的每一行 for i in file: #使用re模块的search功能查找当前行是否能和正则匹配 x=re.search(wordcheck,i) #如果匹配到结果则执行if中的代码 if x: #取出查询到的结果 tmp=x.group() #get函数作用是如果字典中取不到key的值则赋一个默认值，也就是每一次查询到一个新的结果就将这个结果作为key vlaue=0新加到字典中 size[tmp]=size.get(t

by BOOL # with BOOL including must should must_not filter to complete the # format as follows: #bool: {# "filter": [], the filter of the field, Do not participate in the scoring # "must": [], if there are multiple queries, must meet "and" # " should": [], if there are multiple queries, satisfy one or more of the matching "or" # "Must_not": [], on the contrary, the query word is not satisfied with the match "inverse

:(?! Pattern), here the exclamation point is to indicate not, do not need to mean. For example, encounter such a string: noreply@example.com, it will determine whether the noreply @ is the same, if the same, it will lose this pattern recognition, no longer match. Example: # Python 3.6 # Cai junsheng # http://blog.csdn.net/caimouse/article/details/51749579 # import re address = re. compile (''' ^ # An addre

Because of the requirements of the experiment, we need to count a series of strings through Baidu search to get the number of keywords, so use Python wrote a related script.In the process of writing this script encountered a lot of problems, the following will be a word.PS: I did not systematically learn python, just a long time ago used it, feeling that it is mo

Summary of string search operations in Python and python operations Basic string location search methodPython searches for strings using variables. find ("content to be searched" [, start position, end position]), start position and end position, indicating the range to be searched. If it is null, it indicates searchin

, information collation and user query three parts." 1 is the general structure of the search engine, the information collection module from the network to collect information from the network data base (the general use of reptiles); then the information sorting module set up the index table (usually inverted index) to form the index database after the segmentation of the collected information, the use of the word, and the weighted weight. Finally, th

This article mainly introduces the search method function of Beautiful Soup module in Python. Methods different types of filtering parameters can be filtered to get the desired results. The article introduced in very detailed, has certain reference value for everybody, needs the friends to take a look below together. Objective We will use the search function of

In python, the Backward Search confirmation mode using a regular expression is used. In python, the regular expression is used. I learned a lot about it, including forward search, Backward Search, positive search, and negative

What is a search engine? Search engine is "the network information resources to collect and organize and provide information query service system, including information collection, information collation and user query three parts." 1 is the general structure of the search engine, the information collection module from the network to collect information from

Here we will summarize the methods for string search in Python. in addition to the basic find () method, we will also explain how to use the simple matching algorithm and KMP algorithm: Basic string location search methodPython searches for strings using variables. find ("content to be searched" [, start position, end position]), start position and end position,