Python serialize listT

import uuid
from datetime import datetime
import time
import jsonclass Book:def __init__(self,id,name,author,isbn,title,topic):self.id=idself.name=nameself.author=authorself.isbn=isbnself.title=titleself.topic=topicdef __str__(self):return f"Id:{self.id},Name:{self.name},Author:{self.author},ISBN:{self.isbn},Title:{self.title},Topic:{self.topic}"def init_booksList(num=1000000):booksList=[]for a in range(1,num+1):booksList.append(Book(f'{a}',f'Name_{a}',f'Author_{a}',f'ISBN_{a}',f'Title_{a}',f'Topic_{a}'))return booksListdef json_serialize(jsonFile,booksList=None):if booksList==None:returnbk_data=[]for bk in bookslist:bk_dic={'id':bk.id,'name':bk.name,'author':bk.author,'isbn':bk.isbn,'title':bk.title,'topic':bk.topic}bk_data.append(bk_dic)with open(jsonFile,'w+',encoding='utf-8') as writeFile:json.dump(bk_data,writeFile,indent=2)print(f'Serialize {len(booksList)} in {jsonFile}')bookslist=Book.init_booksList(10000000)
jsonFile=f'Book_{datetime.now().strftime("%Y%m%d%H%M%S%f")}.json'
Book.json_serialize(jsonFile,bookslist)

 

PS D:\PY>  d:; cd 'd:\PY'; & 'c:\Users\fred\AppData\Local\Programs\Python\Python314\python.exe' 'c:\Users\fred\.vscode\extensions\ms-python.debugpy-2025.14.1-win32-x64\bundled\libs\debugpy\launcher' '58324' '--' 'D:\PY\PythonTest2.py' 
Serialize 10000000 in Book_20251111220250336698.json
PS D:\PY>