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

#!/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:	exte"
 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。