无法将图像文件放入Python Flask中的亚马逊s3

import boto3

s3 = boto3.client('s3')

from flask import Flask, request

app = Flask(__name__)

@app.route('/upload', methods=['POST'])
def upload():
    file = request.files['image']
    file.save('/tmp/image.jpg')  # 保存到本地临时目录

    # 将图像文件上传到亚马逊S3
    s3.upload_file('/tmp/image.jpg', 'your-bucket-name', 'image.jpg')

    return 'Upload successful'

@app.route('/image')
def get_image():
    # 获取亚马逊S3中图像文件的URL
    url = s3.generate_presigned_url(
        ClientMethod='get_object',
        Params={'Bucket': 'your-bucket-name', 'Key': 'image.jpg'},
        ExpiresIn=3600  # URL的有效期限，单位为秒
    )

    return f'<img src="{url}" alt="image">'