文件处理

#__author:"Ryzreal"
#date :2018/6/21
#大文件最佳处理方法，插入内容
# f = open("test","r",encoding="utf8")
# number = 0
# for i in f:
#     number += 1
#     if number == 6 :
#         i = "".join([i,"qqq"])
#         print(i.strip())
#     print(i.strip())
# f.close()


#文本插入，替换内容
# dir = open ("test","r",encoding= "utf8")
# new_dir = open("test2","w",encoding= "utf8")
# num = 0
# for line in dir:
#     num += 1
#     if num == 6:
#         new_dir.write("asd\n")             # 替换
#        # line = "".join([line, "qqq"])        插入字符串
#     new_dir.write(line)
# dir.close()
# new_dir.close()


#同时管理多个文件
with open("f_read","r",encoding= "utf8")as f_read,open("f_write","w",encoding= "utf8")as f_write:
    number  = 0
    for line in f_read :
        number  += 1
        if number == 6 :
            f_write.write("ahhh\n")
            #line = "".join([line, "appp"])
        f_write.write(line)