populate millions records into mysql database

populate_data.py

from peewee import *
import uuid
import random
import string
from datetime import date, timedelta

db_name = 'db'
table_name = 'table'

db = MySQLDatabase(db_name, user='root', password='123456', host='localhost', port=3307)

class BaseModel(Model):
    """A base model that will use our MySQL database"""
    class Meta:
        database = db

class VehicleSimUsage(BaseModel):
    date = DateField()
    vin = CharField()
    apn1 = IntegerField()
    apn2 = IntegerField()
    voiceCall = IntegerField()
    duration = IntegerField()

    class Meta:
        table_name = table_name
        primary_key = CompositeKey('date', 'vin')

db.connect()
    
def main():
    for j in range(20000):
        data_source = []
        vin = ''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(17))
        print("{}: {}".format(j, vin))
        for i in range(500):
            dict = {'date': date.today() - timedelta(days=i), 'vin': vin, 'apn1': random.randint(1, 1000), 'apn2': random.randint(1, 1000), 'voiceCall': random.randint(1, 100), 'duration': random.randint(1, 100)}
            data_source.append(dict)
        VehicleSimUsage.insert_many(data_source).execute()

main()