2.2.0 breaks typing checks in applications #734

In #716 a py.typed file was added to tell mypy that it should use the provided type annotations (or stub-files) in this package.

Problem with that: there are no type annotations and no stub-file.

In our application this leads to errors like this:

( only on 2.2.0, not in 2.1.0)

Environment details

• Mac OS 12.2.1
• Python version: 3.10.2
• pip version: 21.2.4
• google-cloud-storage version: 2.2.0

Steps to reproduce

1. install 2.2.0 in your application
2. use a class anywhere ( it broke for Client and Blob for me
3. use mypy --strict ( I believe the needed settings are disallow_untyped_defs or disallow_untyped_calls, but I'm not 100% certain. I can provide my config if that's needed).

Code example

import json
import os
from functools import cache

from google.cloud import storage
from google.oauth2 import service_account

@cache
def _client() -> storage.Client:
    if storage_key := os.environ.get("GOOGLE_CLOUD_STORAGE_KEY", None):
        data = json.loads(storage_key)
        credentials = service_account.Credentials.from_service_account_info(data)

        return storage.Client(  # typing error here 
            credentials=credentials,
            project=data["project_id"],
        )

possible solution

• add type annotations to all methods & classes
• remove the py.typed marker again.