aws-lambda: from_security_group_id returns object of invalid type #4669
Description
Describe the bug
The returned object from SecurityGroup.from_security_group_id when used in DockerImageFunction fails to pass the typeguard check in the check_type function.
This error wasn't present when using typeguard version 4.0.0. It used to throw warnings but not errors. The warning is pasted below.
<redacted-path>/lib/python3.12/site-packages/aws_cdk/aws_lambda/__init__.py:1526: UserWarning: Typeguard cannot check the ISecurityGroup protocol because it is a non-runtime protocol. If you would like to type check this protocol, please use @typing.runtime_checkable
typeguard.check_type(value=value, expected_type=expected_type, collection_check_strategy=typeguard.CollectionCheckStrategy.ALL_ITEMS) # type:ignore
The error appears with typeguard version 4.3.0. The error message is pasted below.
Sequence[aws_cdk.aws_ec2.ISecurityGroup]: item 0 is not compatible with the ISecurityGroup protocol because it has no method named '__jsii_proxy_class__'
NoneType: is not an instance of NoneType
Regression Issue
- Select this option if this issue appears to be a regression.
Last Known Working CDK Version
No response
Expected Behavior
The type check should succeed.
Current Behavior
The type check fails and so does cdk deploy or cdk synth.
Reproduction Steps
- Install
typeguardversion 4.3.0 in your environment. - Try to
cdk synththe Stack defined below.
import os
from aws_cdk import App, Environment, Stack
from aws_cdk.aws_ec2 import SecurityGroup, Vpc
from aws_cdk.aws_lambda import DockerImageCode, DockerImageFunction
from constructs import Construct
class AppStack(Stack):
def __init__(self, scope: Construct, id: str, env: Environment) -> None:
super().__init__(scope=scope, id=id, env=env)
sec_group = SecurityGroup.from_security_group_id(
scope=self,
id="LambdaSecurityGroup",
security_group_id="sg-123456",
)
vpc = Vpc.from_lookup(
scope=self,
id="LambdaVPC",
vpc_name="MyVPC",
)
self.lambda_function = DockerImageFunction(
scope=self,
id="AppLambda",
function_name="AppLambda",
description="Handles requests for the Design Brief API",
memory_size=1024,
code=DockerImageCode.from_image_asset(
directory=".",
file="./lambda.Dockerfile",
build_secrets={"GITHUB_TOKEN": "type=env"},
),
security_groups=[sec_group],
vpc=vpc,
)
app = App()
AppStack(
scope=app,
id="DummyStack",
env=Environment(account=os.getenv("CDK_DEFAULT_ACCOUNT"), region="eu-west-1"),
)
app.synth()Possible Solution
No response
Additional Information/Context
No response
CDK CLI Version
2.162.1
Framework Version
No response
Node.js Version
v22.9.0
OS
Mac
Language
Python
Language Version
Python 3.12.4
Other information
No response