python实现搜索指定目录下文件及文件内搜索指定关键词的方法

本文实例讲述了python实现搜索指定目录下文件及文件内搜索指定关键词的方法。分享给大家供大家参考。具体实现方法如下：

#!/usr/bin/python -O
# -*- coding: UTF-8 -*-
"""
Sucht rekursiv in Dateiinhalten und listet die Fundstellen auf.
"""
__author__ = "Jens Diemer"
__license__ = """GNU General Public License v2 or above -
http://www.opensource.org/licenses/gpl-license.php"""
__url__ = "http://www.jensdiemer.de"
__version__ = "0.1"
import os, time, fnmatch
class search:
 def __init__(self, path, search_string, file_filter):
   self.search_path = path
   self.search_string = search_string
   self.file_filter = file_filter
   print "Search '％s' in [％s]..." ％ (
     self.search_string, self.search_path
   )
   print "_" * 80
   time_begin = time.time()
   file_count = self.walk()
   print "_" * 80
   print "％s files searched in ％0.2fsec." ％ (
     file_count, (time.time() - time_begin)
   )
 def walk(self):
   file_count = 0
   for root, dirlist, filelist in os.walk(self.search_path, followlinks=True):
     for filename in filelist:
       for file_filter in self.file_filter:
         if fnmatch.fnmatch(filename, file_filter):
           self.search_file(os.path.join(root, filename))
           file_count += 1
   return file_count
 def search_file(self, filepath):
   f = file(filepath, "r")
   content = f.read()
   f.close()
   if self.search_string in content:
     print filepath
     self.cutout_content(content)
 def cutout_content(self, content):
   current_pos = 0
   search_string_len = len(self.search_string)
   for i in xrange(max_cutouts):
     try:
       pos = content.index(self.search_string, current_pos)
     except ValueError:
       break
     content_window = content[ pos - content_extract : pos + content_extract ]
     print ">>>", content_window.encode("String_Escape")
     current_pos += pos + search_string_len
   print
if __name__ == "__main__":
 search_path = r"c:\texte"
 file_filter = ("*.py",) # fnmatch-Filter
 search_string = "history"
 content_extract = 35 # Gr��e des Ausschnittes der angezeigt wird
 max_cutouts = 20 # Max. Anzahl an Treffer, die Angezeigt werden sollen
 search(search_path, search_string, file_filter)

希望本文所述对大家的Python程序设计有所帮助。