Update

google/cloud/_helpers/__init__.py

@@ -136,7 +136,7 @@ def _ensure_tuple_or_list(arg_name, tuple_or_list):
  return list(tuple_or_list)
 
 
-def _determine_default_project(project=None):
+def _determine_default_project(project: Optional[str] = None):
  """Determine default project ID explicitly or implicitly as fall-back.
 
  See :func:`google.auth.default` for details on how the default project

google/cloud/client/__init__.py

@@ -18,14 +18,16 @@
 import json
 import os
 from pickle import PicklingError
-from typing import Tuple
+from typing import Optional, Tuple
 from typing import Union
 
 import google.api_core.client_options
+from google.api_core.client_options import ClientOptions
 import google.api_core.exceptions
 import google.auth
 from google.auth import environment_vars
 import google.auth.credentials
+from google.auth.credentials import Credentials
 import google.auth.transport.requests
 from google.cloud._helpers import _determine_default_project
 from google.oauth2 import service_account
@@ -150,7 +152,12 @@ class Client(_ClientFactoryMixin):
  Needs to be set by subclasses.
  """
 
- def __init__(self, credentials=None, _http=None, client_options=None):
+ def __init__(
+ self,
+ credentials: Optional[Credentials] = None,
+ _http=None,
+ client_options: Optional[ClientOptions] = None,
+ ):
  if isinstance(client_options, dict):
  client_options = google.api_core.client_options.from_dict(client_options)
  if client_options is None:
@@ -248,7 +255,9 @@ class _ClientProjectMixin(object):
  if the project value is invalid.
  """
 
- def __init__(self, project=None, credentials=None):
+ def __init__(
+ self, project: Optional[str] = None, credentials: Optional[Credentials] = None
+ ):
  # This test duplicates the one from `google.auth.default`, but earlier,
  # for backward compatibility: we want the environment variable to
  # override any project set on the credentials. See:
@@ -316,7 +325,13 @@ class ClientWithProject(Client, _ClientProjectMixin):
 
  _SET_PROJECT = True # Used by from_service_account_json()
 
- def __init__(self, project=None, credentials=None, client_options=None, _http=None):
+ def __init__(
+ self,
+ project: Optional[str] = None,
+ credentials: Optional[Credentials] = None,
+ client_options: Optional[ClientOptions] = None,
+ _http=None,
+ ):
  _ClientProjectMixin.__init__(self, project=project, credentials=credentials)
  Client.__init__(
  self, credentials=credentials, client_options=client_options, _http=_http

pyproject.toml

@@ -0,0 +1,2 @@
+[tool.pyright]
+typeCheckingMode = "strict"