fix(google-auth): invalid TYPE_CHECKING imports in google/auth/_default.py cause Unknown types in Pyright

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@sakshamgoyal-01 已经在做这个了。

开始于 2026年11月13日。

  • #19078 来自 @sakshamgoyal-01 —— 未关闭

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1/5
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新手友好度
25/100
Issue 类型
缺陷
描述清晰度
描述清楚
活跃度
停滞
技术栈
python
领域
authentication

调研方向

The problem is in the TYPE_CHECKING block at the top of google/auth/_default.py, which imports the classes google.auth.credentials.Credentials and google.auth.transport.Request as if they were modules. Check the annotations on default() to see where Pyright reports Unknown. Pull request 19078 is already open against this issue, so review that first. Done means the block imports the modules and Pyright no longer reports Unknown for default().

由索引模型根据 Issue 内容生成。

描述

(Note: This is an AI-generated issue.)

Problem

In google/auth/_default.py, the TYPE_CHECKING block attempts to import classes as if they were submodules:

if TYPE_CHECKING:  # pragma: NO COVER
    import google.auth.credentials.Credentials  # type: ignore
    import google.auth.transport.Request  # type: ignore

Because Credentials and Request are classes (not submodules), these imports fail to resolve and are suppressed with # type: ignore. As a result, type checkers like Pyright / BasedPyright resolve the annotations on google.auth.default():

def default(
    scopes: Optional[Sequence[str]] = None,
    request: Optional["google.auth.transport.Request"] = None,
    quota_project_id: Optional[str] = None,
    default_scopes: Optional[Sequence[str]] = None,
) -> tuple["google.auth.credentials.Credentials", Optional[str]]:

as Unknown (e.g., (..., request: Unknown | None = None, ...) -> tuple[Unknown, str | None]), triggering reportUnknownVariableType / reportUnknownMemberType warnings for callers.

Suggested Fix

Import the modules instead of the classes in the TYPE_CHECKING block:

if TYPE_CHECKING:  # pragma: NO COVER
    import google.auth.credentials
    import google.auth.transport
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