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pythonweb大数据分析(Python实现的大数据分析操作系统日志功能示例)

更多 时间:2022-03-29 18:58:26 类别:脚本大全 浏览量:2383

pythonweb大数据分析

Python实现的大数据分析操作系统日志功能示例

本文实例讲述了Python实现的大数据分析操作系统日志功能。分享给大家供大家参考,具体如下:

一 代码

1、大文件切分

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  • import os
  • import os.path
  • import time
  • def FileSplit(sourceFile, targetFolder):
  •   if not os.path.isfile(sourceFile):
  •     print(sourceFile, ' does not exist.')
  •     return
  •   if not os.path.isdir(targetFolder):
  •     os.mkdir(targetFolder)
  •   tempData = []
  •   number = 1000
  •   fileNum = 1
  •   linesRead = 0
  •   with open(sourceFile, 'r') as srcFile:
  •     dataLine = srcFile.readline().strip()
  •     while dataLine:
  •       for i in range(number):
  •         tempData.append(dataLine)
  •         dataLine = srcFile.readline()
  •         if not dataLine:
  •           break
  •       desFile = os.path.join(targetFolder, sourceFile[0:-4] + str(fileNum) + '.txt')
  •       with open(desFile, 'a+') as f:
  •         f.writelines(tempData)
  •       tempData = []
  •       fileNum = fileNum + 1
  • if __name__ == '__main__':
  •   #sourceFile = input('Input the source file to split:')
  •   #targetFolder = input('Input the target folder you want to place the split files:')
  •   sourceFile = 'test.txt'
  •   targetFolder = 'test'
  •   FileSplit(sourceFile, targetFolder)
  • 2、Mapper代码

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  • import os
  • import re
  • import threading
  • import time
  • def Map(sourceFile):
  •   if not os.path.exists(sourceFile):
  •     print(sourceFile, ' does not exist.')
  •     return
  •   pattern = re.compile(r'[0-9]{1,2}/[0-9]{1,2}/[0-9]{4}')
  •   result = {}
  •   with open(sourceFile, 'r') as srcFile:
  •     for dataLine in srcFile:
  •       r = pattern.findall(dataLine)
  •       if r:
  •         t = result.get(r[0], 0)
  •         t += 1
  •         result[r[0]] = t
  •   desFile = sourceFile[0:-4] + '_map.txt'
  •   with open(desFile, 'a+') as fp:
  •     for k, v in result.items():
  •       fp.write(k + ':' + str(v) + '\n')
  • if __name__ == '__main__':
  •   desFolder = 'test'
  •   files = os.listdir(desFolder)
  •   #如果不使用多线程,可以直接这样写
  •   '''for f in files:
  •     Map(desFolder + '\\' + f)'''
  •   #使用多线程
  •   def Main(i):
  •     Map(desFolder + '\\' + files[i])
  •   fileNumber = len(files)
  •   for i in range(fileNumber):
  •     t = threading.Thread(target = Main, args =(i,))
  •     t.start()
  • 3.Reducer代码

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  • import os
  • def Reduce(sourceFolder, targetFile):
  •   if not os.path.isdir(sourceFolder):
  •     print(sourceFolder, ' does not exist.')
  •     return
  •   result = {}
  •   #Deal only with the mapped files
  •   allFiles = [sourceFolder+'\\'+f for f in os.listdir(sourceFolder) if f.endswith('_map.txt')]
  •   for f in allFiles:
  •     with open(f, 'r') as fp:
  •       for line in fp:
  •         line = line.strip()
  •         if not line:
  •           continue
  •         position = line.index(':')
  •         key = line[0:position]
  •         value = int(line[position + 1:])
  •         result[key] = result.get(key,0) + value
  •   with open(targetFile, 'w') as fp:
  •     for k,v in result.items():
  •       fp.write(k + ':' + str(v) + '\n')
  • if __name__ == '__main__':
  •   Reduce('test', 'test\\result.txt')
  • 二 运行结果

    依次运行上面3个程序,得到最终结果:

    07/10/2013:4634
    07/16/2013:51
    08/15/2013:3958
    07/11/2013:1
    10/09/2013:733
    12/11/2013:564
    02/12/2014:4102
    05/14/2014:737

    希望本文所述对大家Python程序设计有所帮助。

    原文链接:https://blog.csdn.net/chengqiuming/article/details/78601136

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