python parse log file

Interview Topics:1. Use Python to implement TAIL-F function, display the last 15 lines by default, and output new lines in real time?Problem Solving Ideas:1. This requirement has been encountered in many scenarios, and has been discussed in various groups, although there are ready-made templates such as pyinotify and other modules to achieve, but the interview would like to use your problem-solving ideas to judge the interview, specific to tail need t

#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

Tags: nginx access python statistics trafficThe boss has a request, said to see a URL daily visits, but the system in the development of the time did not do such a count, so I think, because the previous load using Nginx do, have access logs, try to analyze the results from the access log, the final effect is realized, Perhaps the efficiency is not so high, the logic is not so reasonable, at least the effec

The method of writing a log is various, I this is I like the method, can make a referenceThere's nothing to say, just the code.Import TimedefWrite_log (value): Now_time= Time.time ()#get the current date and timeTime_format ='%y-%m-%d%h:%m:%s' #Specify the date and time formatTime_put = Time.strftime (time_format,now_time)#format time, time becomes YYYY-MM-DD HH:MI:SSfile_name ='/log/log.log'Log_file= Open

How to print error tracking: Method 1. Print to screen Try i = 0 Mydbhandler.executemany (SQL, TMP) Logging.info ("[Total cost Time:" + str (time.time ()-start) *1000) + "Ms]" Print "Total cost time:", (Time.time ()-start) *1000, "MS" Except EType, evalue, tracebackobj = Sys.exc_info () [: 3] print ' Type: ', etype Print "Value:", Evalue TRACEBACK.PRINT_TB (Tracebackobj) Method 2. Print to FileImport loggingLog_filename = '/tmp/logging_example.out 'Logging.basicconfig (filename=log_filename,l

#!/usr/bin/env python#CODING=GBKImportLogging, OSclassLogger:def __init__(Self, path, clevel=logging. DEBUG, flevel=logging. DEBUG): Self.logger=Logging.getlogger (path) self.logger.setLevel (logging. DEBUG) FMT= Logging. Formatter ('[% (asctime) s] [% (levelname) s]% (message) s','%y-%m-%d%h:%m:%s') #set cmd logSH =logging. Streamhandler () sh.setformatter (FMT) sh.setlevel (clevel)#Set File LogFH =

Typically used to notify events that a program has occurred WARNING Report abnormal events, but the software still works ERROR More serious problems, the software cannot run a feature CRITICAL Critical error, the software itself cannot be run Log Default level is WARNING, can be understood as more than WARNING records, less than WARNING are not recorded , of course, you can also c

Requests.auth import Httpproxyauthproxies_dict={' http ': ' **.**.**.** ', ' https ': ' **.**.**.** '}auth=httpproxyauth{' user ', ' passwd '}Res=requests.get (url= ", Proxies=proxies_dict,auth=auth)Print (Res.text)Stream: Used when downloading large files, like the context management of an iterator.1. Res=requests.get (url= ' https://www.autohome.com.cn/news/')For I in Res.iter_content ():Print (i)2. Form Contextlib Importan ClosingWith closing (requests.get (' https://www.autohome.com.cn/news

Download and install AjaxtermCreate a new userHere, I built a ip.txt file to store the IP addressSu-haojiemaoVI term__ssh.pyThe code is as follows:　　#! /usr/bin/env pythonimport osip_file = ' ip.txt ' ip_dic = {}num = 0f = File (ip_file) while True: num + = 1 line = F.rea Dline () If Len (line) = = 0:break Ip_dic[num] = Linef.close () and True: try: For k,v in Ip_dic.item

File-like object to read and write to the Socket. Handle (): Process the Request. Resolves incoming requests, processes data, and sends a response. Nothing is done by Default. Common Variables: Self.request,self.client_address,self.server. Finish (): Environment Cleanup. Nothing is done by default, and if Setup produces an exception, the finish is not Executed. typically, you only need to overload Handle. The type of self.request differs

following methods can be overloaded: Setup (): Prepares request processing. By default, nothing is done, and Streamrequesthandler creates a file-like object to read and write to the socket. Handle (): Process the request. Resolves incoming requests, processes data, and sends a response. Nothing is done by default. Common variables: Self.request,self.client_address,self.server. Finish (): Environment cleanup. Nothing is done by defaul

Python timer usage + get script where absolute path + define log format test codeIf you write a script with a timer in Python, if the script also read the configuration file, then the configuration file path if you write to die, one day to change the directory, you need to c

Cited:Prior to using the nose framework, the log was used to generate logs using the--logging-config log file, which is visible before the Python nose test framework is fully described in four.But after using a period of time, issued a problem, generated reports only error prompts, no logs, view nose's official website

Using python, we developed a program to extract time from key steps in sim. log and perform statistics: #!/usr/bin/python2.6import re,datetimefile_name='/home/alzhong/logs/qtat1/R2860.01.13/sim-applycommitrollback-bld1.log'file=open(file_name,'r')acnum=[];time_res=[];lnum=0def trans_time(time): t1=datetime.datetime.strptime(time,'%y/%m/%d %H:%M:%S') return t1for (num,line) in enumerate(

Directory[TOC]First, the problem is thrownPython's logging module is a powerful tool for Python to print logs during use. We can use the logger, Handler, formatter of the logging module to encapsulate our logs, specifying the path, format, and location of the log output. When declaring logger, you can pass a string as a label for this logger. Always thought that this logger is a singleton object design patt

The cause of the problem To facilitate viewing of the online problem log, a new site is created on IIS on the server, the root directory points to the log directory, and directory browsing begins;Well, you can enter the site, see the list of directories, find a TXT file, click to see the Log, Yi, how the Chinese into

Brief introductionThis article is intended to describe how to define a Python source file encoding. The Python interpreter can parse the current file based on the encoding information specified. Typically, this approach improves the parser's recognition of Unicode-encoded so

Cause: The Log collection service for Python is thread-safe (writes to the same file, locks are used), but it cannot be processed for multi-process scenarios. The Python official documentation recommends using a TCP server dedicated to the collection of logs to ensure that the writes to the files are secure. The twiste

The logging module in the Python Standard library provides a standard set of APIs to handle the printing of log information.ImportLogginglogging.basicconfig ( level=logging. DEBUG, Format='% (asctime) s [% (ThreadName) s] (% (filename) s:% (lineno) d)% (levelname) s-% (message) s', Datefmt='%y-%m-%d%h:%m:%s', filename='Myapp.log',) Logging.debug ('This is a debug message') Logging.info ('This is an info mes

For some reasons, need SAE on the site log files, from the SAE can only be downloaded, download down manual processing compared to egg pain, especially when the number is very large. Fortunately, the SAE provides API to bulk get log file download addresses, just write a python script to automatically download and merge