boto的get_resource_type（'s3'）。Object（bucket_name，key）是否可以使用通配符？

Question

I'm very new to python. I'm using this library that's using boto like this:

def get_key(self, key, bucket_name=None):
    """
    Returns a boto3.s3.Object

    :param key: the path to the key
    :type key: str
    :param bucket_name: the name of the bucket
    :type bucket_name: str
    """
    if not bucket_name:
        (bucket_name, key) = self.parse_s3_url(key)

    obj = self.get_resource_type('s3').Object(bucket_name, key)
    obj.load()
    return obj

I'm trying to figure out if that Object(bucket_name, key) can take wild cards so that I can download multiple files at once.

I've copied this file and modified it so it prints out type(resource_type) , but that just says <class 'boto3.resources.factory.s3.ServiceResource'> . Although I can find the source to that class, it doesn't seem to have an Object() method in it so I don't know how to answer my question.

1. How do I find the source code of that Object() method?
2. Does Object(bucket_name, key) take wild cards? If no, which method should I be calling instead?

Answer 1

s3 allows you to download 1 object with 1 call. You have to enter the exact key to download any object. If you want to download multiple objects you will need to use a loop to list out all of the keys you want to download. You can use list_objects_v2 to get a list of the all the keys and then filter out the list depending on your conditions. If key matches the condition, call the get_object API to download the body of the object. Note that both these calls are available on client and not resource.