内容：在使用亚马逊商品详情API时，可能会遇到各种异常情况，如网络错误、API调用频率限制、无效的API密钥等。本文将介绍如何使用Python处理这些异常情况。通过try-except块捕获可能出现的异常，如requests.exceptions.RequestException处理网络请求异常，针对不同的异常情况采取相应的措施，如重试请求、记录错误日志或提示用户重新获取API密钥等。
示例代码片段：
pythonimport requestsimport hmacimport hashlibfrom datetime import datetimeimport logginglogging.basicConfig(filename="api_errors.log", level=logging.ERROR)def get_amazon_product_details(asin, access_key, secret_key): endpoint = "webservices.amazon.com" params = { "Service": "AWSECommerceService", "Operation": "ItemLookup", "ResponseGroup": "ItemAttributes,Offers,Images", "IdType": "ASIN", "ItemId": asin, "AWSAccessKeyId": access_key, "Timestamp": datetime.utcnow().strftime("%Y-%m-%dT%H:%M:%SZ") } sorted_params = sorted(params.items()) query = "&".join([f"{k}={v}" for k, v in sorted_params]) signature = hmac.new(secret_key.encode(), query.encode(), hashlib.sha256).hexdigest() url = f"https://{endpoint}/onca/xml?{query}&Signature={signature}" try: response = requests.get(url) response.raise_for_status() return response.text except requests.exceptions.RequestException as e: logging.error(f"请求亚马逊API出错: {e}") return None