Python 已超过url：Forecast的最大重试次数.无法在Fastapi应用程序上建立新连接：[WinError 10061]

我想在本地部署一个超级简单的基本应用程序，它使用我之前拟合的ML模型来预测我的测试数据集中的数据.以下是FastAPI模块的格式:

from fastapi import FastAPI
import pickle
import numpy as np
# import pandas as pd
import json
from typing import *

app = FastAPI()
    
def predict(data: List[float]):
    with open("model.pkl", "rb") as f:
        model = pickle.load(f)
    data = np.array(data).reshape(1, -1)
    prediction = model.predict(data)
    return prediction

@app.post("/predict")
def predict_route(data: List[float]):
    prediction = predict(data)
    return {"prediction": prediction}

import requests

f = open('test_data.json',) 
data = json.load(f) 

response = requests.post("http://localhost:8000/predict", json=data)
print(response.json())

当我try 使用以下工具使其工作时，问题就出现了

uvicorn main:app --reload个

我从cmd获得以下代码:

requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=8000): Max retries exceeded with url: /predict (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x000002080F90E870>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it'))个

有人能帮助我实现这一点吗？