python查找特定文件中的关键字_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:\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)