在AWS Lambda中执行Py脚本时的UnboundLocalError

Question

我在执行下面的py脚本时遇到了下面的错误。如果有人能在这方面帮我的话我真的很感激。

[ERROR] UnboundLocalError: local variable 'get_object' referenced before assignment 
Traceback (most recent call last):
   File "/var/task/lambda_function.py", line 28, in lambda_handler
   readObj = get_object(waf_bucket, waf_key)

def lambda_handler(event, context):
    print(event,context)

    waf_bucket = event['Records'][0]['s3']['bucket']['name']
    
    waf_key = event['Records'][0]['s3']['object']['key']
    print("BucketName: {}, Key: {}".format(waf_bucket, waf_key))
    print("Processing File: {}".format(waf_key))
    readObj = get_object(waf_bucket, waf_key)
    print(readObj)

Answer 1

通过查看您的代码，我可以理解您正在尝试从s3获取对象。因此，您应该已经在lambda_handler函数之上为s3客户端创建了一个实例。下面的代码必须解决你的问题。

client = boto3.client('s3')
def lambda_handler(event, context):
    print(event,context)

    waf_bucket = event['Records'][0]['s3']['bucket']['name']

    waf_key = event['Records'][0]['s3']['object']['key']
    print("BucketName: {}, Key: {}".format(waf_bucket, waf_key))
    print("Processing File: {}".format(waf_key))
    readObj = client.get_object(waf_bucket, waf_key)
    print(readObj)