原文：ThrottlingException: Too many requests, please wait before trying again.
译文：限流异常：请求过多，请稍后再试。

原因分析

解决方案

python
import time
import boto3
from botocore.config import Config
配置重试策略和退避机制

config = Config(
    retries={
        'max_attempts': 5,  # 增加重试次数
        'mode': 'adaptive'  # 自适应重试模式
    }
)
bedrock_runtime = boto3.client('bedrock-runtime', config=config)
def invoke_model_with_backoff(prompt, max_retries=5):
    for attempt in range(max_retries):
        try:
            response = bedrock_runtime.invoke_model(
                modelId='claude-sonnet-4-5-20250929',
                body=json.dumps({"prompt": prompt})
            )
            return response
            
        except Exception as e:
            if 'ThrottlingException' in str(e):
                # 指数退避：2^attempt 秒
                wait_time = 2  attempt
                print(f"第{attempt+1}次重试，等待{wait_time}秒...")
                time.sleep(wait_time)
            else:
                raise e
    raise Exception("达到最大重试次数，请求失败")

预防措施

建议：在生产环境中使用令牌桶算法或漏桶算法来控制请求速率，避免突发流量触发限流。