isinstance(s3_client, S3Client) is false, should I expect True?

[chen2073]

Describe the bug I have boto3 type stubs installed and initialized a S3 client, I tried assigning this s3 client to pydantic BaseSettings and it failed validation where s3_client is not a S3Client

To Reproduce Steps to reproduce the behavior:

1. Install boto3-stubs[all]

from boto3.session import Session
from mypy_boto3_s3.client import S3Client
s3_client = Session().client("s3")
isinstance(s3_client, S3Client)
...

**Actual output**

False
...

**Expected output**

True
...

[vemel]

Hello!

In your example s3_client has type boto3.client.BaseClient in runtime. S3Client can be used only during type checking.

You can check client service name in runtime using

from boto3.session import Session
from mypy_boto3_s3.client import S3Client

s3_client = Session().client("s3")
s3_client.meta.service_model.service_name == "s3"

Please let me know if this helps.

[chen2073]

Thank you for the response, I will give it a try