Python json write serialized content to json file

import uuid
from datetime import datetime
import threading
import psutil
import os
import json
import asyncio
import time
from tkinter import messageboxidx=0
def get_memory():global idxpid=os.getpid()proc=psutil.Process(pid)mem_info=proc.memory_info()rss_mem=f'{mem_info.rss/1024/1024:.2f} M'vms_mem=f'{mem_info.vms/1024/1024:.2f} M'pc_mem=psutil.virtual_memory()total_mem=f'{pc_mem.total/1024/1024/1024:.2f} G'avail_mem=f'{pc_mem.available/1024/1024/1024:.2f} G'used_rate=f'{pc_mem.percent} %'return f'Idx:{idx},{datetime.now()},rss mem:{rss_mem},vms mem:{vms_mem},total mem:{total_mem},avail mem:{avail_mem},used rate:{used_rate}'def get_time_uuid():global idxidx+=1return f'{idx}_{datetime.now().strftime('%Y%m%d%H%M%S%f')}_{uuid.uuid4().hex}'def get_uuid_time():global idxidx+=1return f'{idx}_{uuid.uuid4().hex}_{datetime.now().strftime('%Y%m%d%H%M%S%f')}'class Book:def __init__(self,id,name,isbn,author,abstract,comment,content,summary,title,topic):self.id=idself.name=nameself.isbn=isbnself.author=authorself.abstract=abstractself.comment=commentself.content=contentself.summary=summaryself.title=titleself.topic=topicdef to_dict(self):return {'Id':self.id,'Name':self.name,'ISBN':self.isbn,'Author':self.author,'Abstract':self.abstract,'Comment':self.comment,'Content':self.content,'Summary':self.summary,'Title':self.title,'Topic':self.topic}if __name__=='__main__':data_list=[]arr=range(1,20000001)for a in arr:idx+=1bk=Book(a,f'Name_{a}',f'ISBN_{a}_{uuid.uuid4().hex}',f'Author_{a}',f'Abstract_{a}',f'Comment_{a}',f'Content_{a}',f'Summary_{a}',f'Title_{a}',f'Topic_{a}')data_list.append(bk.to_dict())if a%1000000==0:print(get_memory())json_file=f'Json_{datetime.now().strftime('%Y%m%d%H%M%S%f')}.json'with open(json_file,'w',encoding='utf-8-sig') as json_write_file:json.dump(data_list,json_write_file,indent=4)print(f'{datetime.now()},write {len(data_list)} to {json_file}')messagebox.showinfo(datetime.now(),f'Write {len(data_list)} to {json_file}')