__init__.py 文件源码

def check_s3_file_exists(s3_path, file_name):
    """
    Determine if a s3 key exists
    :param s3_path: an s3 "directory" path (e.g. s3://mybucket/name/)
    :param file_name: a pathless file name (e.g. myfile.txt)
    :return: True if key exists; False otherwise
    """
    full_path = s3_path.rstrip('/') + '/' + file_name
    bucket_name, key_prefix = full_path[5:].split("/", 1)
    client = boto3.client('s3')
    # see if file exists
    try:
        client.get_object(Bucket=bucket_name, Key=key_prefix)
    except:
        return False

    return True