需要安装的包如下：
greenlet==1.1.2
importlib-metadata==4.12.0
inflect==5.6.1
psycopg2==2.9.3
sqlacodegen==3.0.0rc1
SQLAlchemy==1.4.39
zipp==3.8.0


代码如下：

import os
from tools.db import DB
import threading

def gen_table_model(tablename):
    os.system(f'sqlacodegen postgresql+psycopg2://username:password@192.168.80.150:5432/dbname --tables {tablename}> ./3.0.0/{tablename}.py')


if __name__ == '__main__':

    db = DB("192.168.80.150", "5432", "username", "password", "dbname")
    db.connect()
    all_tables = db.fetch_all("SELECT tablename FROM pg_tables WHERE tablename  not LIKE 'pg%' AND tablename NOT LIKE 'sql_%' ORDER BY tablename;")
    db.close()
    table_list = []

    for table in all_tables:
        print(table)
        print(type(table))
        for t in table:
            table_list.append(t)

    threads=[]
    for table in table_list:
        threads.append(
            threading.Thread(target=gen_table_model,args=(table,))
        )
    for thread in threads:
        thread.start()
    for thread in threads:
        thread.join()

注意，由于数据库自增值的类型是identity,这个转换时只有在sqlacodegen 3.0.0版本才生效，如果使用2.4.x版本，会报错。