from fastapi import FastAPI
from pydantic import BaseModel
import os
from dotenv import load_dotenv
from neo4j import GraphDatabase

load_dotenv()
uri=os.getenv("uri")
user=os.getenv("user")
pwd=os.getenv("pwd")

class database(BaseModel):
    db:str

def connection():
    driver=GraphDatabase.driver(uri=uri,auth=(user,pwd))
    return driver

app=FastAPI()

@app.post("/selectdb")
def selectdb(database:database):
    driver_neo4j=connection()
    session=driver_neo4j.session()
    query = f":use {database.db}"
    result = session.run(query)
    return {"response: You have selected the database: " + database.db}

在Python Neo4j驱动程序中使用：use进行查询是不可能的，还是我在这里做错了什么？