clients.py
"""
Wraps boto3 to provide client and resource objects that connect to Localstack when
running tests if LOCALSTACK_URL env variable is set, otherwise connect to real AWS.
"""
import os
import boto3
# Port 4566 is the universal "edge" port for all services since localstack v0.11.0,
# so LOCALSTACK_URL can be of the form "http://hostname:4566".
# "None" means boto3 will use the default endpoint for the real AWS services.
ENDPOINT_URL = os.getenv("LOCALSTACK_URL", None)
def s3_resource():
return boto3.resource("s3", endpoint_url=ENDPOINT_URL)
def s3_client():
return boto3.client("s3", endpoint_url=ENDPOINT_URL)
mycode.py
from mymod.aws.clients import s3_resource
s3 = s3_resource()
def __get_object_etag(self, s3_dir_to_download_file_from: str, file_name: str) -> str
bucket, key = s3.deconstruct_s3_path(
f"{s3_dir_to_download_file_from}/{file_name}"
)
try:
etag_value = s3_resource().Object(bucket, key).e_tag
return etag_value
except botocore.exceptions.ClientError:
raise
I am wondering if in mycode.py I am doing the correct error handling when the file i am looking for does not exist on s3. I basically expect key to be there and if not i want to raise and error i do not want to proceed further as this code will be used part of a pipeline that relies on each previous step.
I would love to know if i am handling the error correct or if i am wrong then how would one handle this case?
From what I understand "exceptions" are suppose to handle errors and proceed further but in my case I do not want to proceed further in the rest of my code if the file i am looking for on S3 is missing.
