How does Python wrap a file in binary mode?

when scrapy saves data through Pipeline (in txt format), some data "gbk" codec can"t encode character appears as follows. 

class TxtPipeline(object):
    def process_item(self,item,spider):
        path=os.getcwd()
        filename = path + "\data\%s.txt"%item["classic"]
        with open(filename, "a")as f:
            f.write(item["title"] + "\n")
            f.write(item["time"] + "\n")
            f.write(item["text"] + "\n")
        ...

so I use the binary append mode to save the data, and unify it into utf8 , such as: 

with open(path, "ab")as f:
        f.write(item["title"].encode("utf-8", errors="ignore")+"\n")

but"\ n"is not bite, so it is changed to b"\ n", but you can"t change the line to do so.
questions are as follows:

  1. how to solve a problem like the one above?
  2. how to solve the coding problem if is not in binary mode? ( Note: all item entries are strings )

I am not good at learning, so please give me some advice.

Scrapy python
Mar.11,2021 
with open(path, 'w')as f:

Why not write directly w ? This uft8 can be written directly into the txt file, ah, why use binary? 

with open(file,mode='a',encoding='utf-8') as f:

append mode will not delete everything written.
if the character you want to write starts with utf-8 encoding, otherwise you should change the encoding
just specify the encoding when you open the file

you can write them separately 

class TxtPipeline(object):
    def process_item(self,item,spider):
        path=os.getcwd()
        filename = path + '\data\%s.txt'%item['classic']
        with open(filename, 'a')as f:
            f.write(item['title'])
            f.write('\n')
        ...

Previous: How Javascript listens for keyboard and mouse click events and invokes event handlers at the same time

Next: The returned array can be fetched at the beginning of the menu on-open-change event in iview2.13.1, but it will not be available if you click on it later.

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b31380-34127.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b31380-34127.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?