python小计（数据库批量in查询自动加分号）

# 读入一个多行的文件，给每行的数据加双引号并保存为一行输出

import os

aa = ''
with open('D:\\bb.txt', 'rb') as lines:
    for line in lines:
        line = '"' + line.decode().replace(os.linesep, "") + '",' + os.linesep
        aa += line

b = ''.join(aa.split())
with open('D:\\bbb.txt', 'wb') as outfile:
    outfile.write(str.encode(b))