fix: replace deprecated utcfromtimestamp in google-auth-oauthlib (#16732)

chalmerlowe · google-labs-jules[bot] · web-flow · commit e1c5af76593e · 2026-04-21T05:27:00.000-04:00
This PR replaces the usage of the deprecated `datetime.datetime.utcfromtimestamp` in the `google-auth-oauthlib` package and testdata. Using `datetime.datetime.fromtimestamp(session.token["expires_at"], datetime.timezone.utc).replace(tzinfo=None)` avoids the deprecation warning in Python 3.12 while preserving backwards compatibility by returning a naive datetime object. Fixes #15433 --- *PR created automatically by Jules for task [232508796818525143](https://jules.google.com/task/232508796818525143) started by @chalmerlowe* Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com> Co-authored-by: chalmerlowe <7291104+chalmerlowe@users.noreply.github.com>
diff --git a/packages/gcp-sphinx-docfx-yaml/tests/testdata/auth/google_auth_oauthlib/helpers.py b/packages/gcp-sphinx-docfx-yaml/tests/testdata/auth/google_auth_oauthlib/helpers.py
@@ -147,5 +147,7 @@ def credentials_from_session(session, client_config=None):
             scopes=session.scope,
             granted_scopes=session.token.get("scope"),
         )
-    credentials.expiry = datetime.datetime.utcfromtimestamp(session.token["expires_at"])
+    credentials.expiry = datetime.datetime.fromtimestamp(
+        session.token["expires_at"], datetime.timezone.utc
+    ).replace(tzinfo=None)
     return credentials
diff --git a/packages/google-auth-oauthlib/google_auth_oauthlib/helpers.py b/packages/google-auth-oauthlib/google_auth_oauthlib/helpers.py
@@ -147,5 +147,7 @@ def credentials_from_session(session, client_config=None):
             scopes=session.scope,
             granted_scopes=session.token.get("scope"),
         )
-    credentials.expiry = datetime.datetime.utcfromtimestamp(session.token["expires_at"])
+    credentials.expiry = datetime.datetime.fromtimestamp(
+        session.token["expires_at"], datetime.timezone.utc
+    ).replace(tzinfo=None)
     return credentials

Original file line number	Diff line number	Diff line change
`@@ -147,5 +147,7 @@ def credentials_from_session(session, client_config=None):`
`147`	`147`	`scopes=session.scope,`
`148`	`148`	`granted_scopes=session.token.get("scope"),`
`149`	`149`	`)`
`150`		`- credentials.expiry = datetime.datetime.utcfromtimestamp(session.token["expires_at"])`
	`150`	`+ credentials.expiry = datetime.datetime.fromtimestamp(`
	`151`	`+ session.token["expires_at"], datetime.timezone.utc`
	`152`	`+ ).replace(tzinfo=None)`
`151`	`153`	`return credentials`