__init__.py 文件源码

def is_valid_s3_bucket(s3_string):
    """
    Determine if the input string starts with a valid s3 bucket name
    :param s3_string: an aws s3 address (e.g. s3://mybucket/other...)
    :return: True if the s3_string contains a valid bucket name
    """
    client = boto3.client('s3')
    # only applies to s3 - so ignore otherwise
    if s3_string[0:5] != 's3://':
        return False
    # get the bucket name
    bucket = s3_string[5:].strip('/').split('/')[0]
    if not bucket:
        return False
    # see if bucket exists
    try:
        client.list_objects(Bucket=bucket)
    except:
        return False

    return True