本文實例講述了python實現搜索指定目錄下文件及文件內搜索指定關鍵詞的方法。分享給大家供大家參考。具體實現方法如下：

#!/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, fnmatchclass 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    printif __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)

希望本文所述對大家的Python程序設計有所幫助。