Catching boto3 ClientError subclass
Full error message
With code like the snippet below, we can catch AWS exceptions:
from aws_utils import make_session
session = make_session()
cf = session.resource("iam")
role = cf.Role("foo")
try:
role.load()
except Exception as e:
print(type(e))
raise e
The returned error is of type botocore.errorfactory.NoSuchEntityException. However, when I try to import this exception, I get this:
>>> import botocore.errorfactory.NoSuchEntityException
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named NoSuchEntityException
The best method I could find of catching this specific error is:
from botocore.exceptions import ClientError
session = make_session()
cf = session.resource("iam")
role = cf.Role("foo")
try:
role.load()
except ClientError as e:
if e.response["Error"]["Code"] == "NoSuchEntity":
# ignore the target exception
pass
else:
# this is not the exception we are looking for
raise e
But this seems very "hackish". Is there a way to directly import and catch specific subclasses of ClientError in boto3?
EDIT: Note that if you catch errors in the second way and print the type, it will be ClientError.Solutionsource: stackoverflow \u2197
If you're using the client you can catch the exceptions like this: import boto3 def exists(role_name): client = boto3.client('iam') try: client.get_role(RoleName='foo') return True except client.exceptions.NoSuchEntityException: return False
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