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。