問題描述 使用 boto3 檢查 s3 的存儲桶中是否存在密鑰 (check if a key exists in a bucket in s3 using boto3) 我想知道 boto3 中是否存在密鑰。我可以循環存儲桶內容並檢查密鑰是否匹配。 但這似乎更長而且有點過分。Boto3 官方文檔明確說明瞭如何執行此操作。 可
Assuming you just want to check if a key exists (instead of quietly over-writing it), do this check first. Will also check for errors: import boto3 def key_exists(mykey, mybucket): s3_client = boto3.client('s3') try: response = s3_client.list_objects_v2(Bucket=mybucket, Prefix=m...
上面的代码使用了MaxKeys=1。这样效率更高。即使文件夹包含很多文件，它也会快速地响应其中的一个内容。
My intention is to not re-write the object if it exists by name. The race condition here is fairly obvious: kick off an upload asynchronously, then do a quick check withkey_exists_in_bucket(), getting backFalseif the object is still being written, then go to write it again unnecessarily...
if e.response['Error']['Code'] == 'EntityAlreadyExists': print("User already exists") else: print("Unexpected error: %s" % e) 异常中的响应字典将包含以下内容: ['Error']['Code'] 例如 'EntityAlreadyExists' 或 'ValidationError'
aws_access_key_id=access_key_id, aws_secret_access_key=secret_access_key, aws_session_token=session_token, region_name=region_name, ) ### Tracking information <!-- PLEASE KEEP BACKTICKS AND CHECK PREVIEW --> ```shell AWS_ACCESS_KEY=... ...
s3.meta.client.head_bucket(Bucket='mybucket')exceptbotocore.exceptions.ClientErrorase:# If a client error is thrown, then check that it was a 404 error.# If it was a 404 error, then the bucket does not exist.error_code=int(e.response['Error']['Code'])iferror_code==404:exists=False...
# Boto 3import botocorebucket = s3.Bucket('mybucket')exists = Truetry:s3.meta.client.head_bucket(Bucket='mybucket')except botocore.exceptions.ClientError as e:# If a client error is thrown, then check that it was a 404 error.# If it was a 404 error, then the bucket does not exist...
),'assume_role() cannot be called without "duration_seconds" parameter; please check your "expires_in" parameters'try:ifconfigand"aws_access_key_id"inconfig: self.sts_client = client("sts", **config) session_name_postfix = uuid.uuid4()returnself.sts_client.assume_role( ...
其中,local_file_path是本地文件的路径,bucket_name是目标存储桶的名称,s3_file_key是在存储桶中保存文件的键。 如果要从S3存储桶下载数据到Lambda函数中,可以使用download_file方法:s3_client.download_file(bucket_name, s3_file_key, local_file_path)。其中,bucket_name是源存储桶的名称,s3_file_key是要...