使用 boto3 从 S3 存储桶中查找最新的 CSV 文件，Python

Question

我想从 S3 存储桶中找到最新的.csv 文件，其中包含多种格式的文件，如 .json、.xlsx、.csv、.txt 文件。

Client = boto3.client('s3', aws_access_key_id=S3_AccessKey, aws_secret_access_key=S3_SecretKey)
Response = Client.list_objects_v2(Bucket=S3_BucketName, Prefix=PrefixPath)

Files_ListS = Response.get('Contents')

Below script gives latest file from S3 and I am getting some.json file (bcz recently updated), I want to.csv file which is updated before json file, means latest from csv files.

max(Files_ListS , key=lambda x: x['LastModified'])

Answer 1

您可以通过检查 object 键是否以 .csv 结尾，使用列表推导仅过滤.csv文件：

csv_objects = [f for f in Files_ListS if f['Key'].endswith('.csv')]
max(csv_objects, key=lambda x: x['LastModified'])