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。

到此这篇关于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就介绍到这了。前有阻碍，奋力把它冲开，运用炙热的激情，转动心中的期待，血在澎湃，吃苦流汗算什么。更多相关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内容请查看相关栏目，小编编辑不易，再次感谢大家的支持！