用python2.7.9 写个小程序搜索某个目录下行有某关键字

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# -*- coding: utf-8 -*-
import sys
reload(sys)
sys.setdefaultencoding("utf-8")
import os




def print_pos(key_dict):
keys = key_dict.keys()
keys = sorted(keys) # 由于字典是无序的,我们这里对行数进行排序
for each_key in keys:
print(‘关键字出现在第 %s 行,第 %s 个位置。‘ % (each_key, str(key_dict[each_key])))


def pos_in_line(line, key):
pos = []
begin = line.find(key)
while begin != -1:
pos.append(begin + 1) # 用户的角度是从1开始数
begin = line.find(key, begin + 1) # 从下一个位置继续查找

return pos


def search_in_file(file_name, key):
f = open(file_name,‘r‘)
count = 0 # 记录行数
key_dict = dict() # 字典,用户存放key所在具体行数对应具体位置

for each_line in f:
count += 1
if key in each_line:
pos = pos_in_line(each_line, key) # key在每行对应的位置
key_dict[count] = pos

f.close()
return key_dict


def search_files(key, detail):
all_files = os.walk(os.getcwd())
txt_files = []

for i in all_files:
for each_file in i[2]:
if os.path.splitext(each_file)[1] == ‘.txt‘: # 根据后缀判断是否文本文件
each_file = os.path.join(i[0], each_file)
txt_files.append(each_file)

for each_txt_file in txt_files:
key_dict = search_in_file(each_txt_file, key)
if key_dict:
print ‘================================================================‘
print ‘在文件【%s】中找到关键字【%s】‘ % (each_txt_file, key)
if detail in [‘YES‘, ‘Yes‘, ‘yes‘]:
print_pos(key_dict)


key = raw_input(‘请将该脚本放于待查找的文件夹内,请输入关键字:‘)
detail = raw_input(‘请问是否需要打印关键字【%s】在文件中的具体位置(YES/NO):‘ % key)
search_files(key, detail)

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