Remove unnecessary cast from append_messages lambda

fede-kamel · fede-kamel · commit ac892ac1ca08 · 2026-02-27T11:08:15.000-05:00
The cast was not needed - pyright passes without it.
diff --git a/src/anthropic/lib/tools/_beta_runner.py b/src/anthropic/lib/tools/_beta_runner.py
@@ -15,7 +15,6 @@
     Iterator,
     Coroutine,
     AsyncIterator,
-    cast,
 )
 from contextlib import contextmanager, asynccontextmanager
 from typing_extensions import TypedDict, override
@@ -110,10 +109,7 @@ def append_messages(self, *messages: BetaMessageParam | ParsedBetaMessage[Respon
         ]
         self._messages_modified = True
         self.set_messages_params(
-            lambda params: cast(
-                ParseMessageCreateParamsBase[ResponseFormatT],
-                {**params, "messages": [*params["messages"], *message_params]},
-            )
+            lambda params: {**params, "messages": [*params["messages"], *message_params]}
         )
         self._cached_tool_call_response = None
 

Original file line number	Diff line number	Diff line change
`@@ -15,7 +15,6 @@`
`15`	`15`	`Iterator,`
`16`	`16`	`Coroutine,`
`17`	`17`	`AsyncIterator,`
`18`		`- cast,`
`19`	`18`	`)`
`20`	`19`	`from contextlib import contextmanager, asynccontextmanager`
`21`	`20`	`from typing_extensions import TypedDict, override`
`@@ -110,10 +109,7 @@ def append_messages(self, *messages: BetaMessageParam \| ParsedBetaMessage[Respon`
`110`	`109`	`]`
`111`	`110`	`self._messages_modified = True`
`112`	`111`	`self.set_messages_params(`
`113`		`- lambda params: cast(`
`114`		`- ParseMessageCreateParamsBase[ResponseFormatT],`
`115`		`- {*params, "messages": [params["messages"], *message_params]},`
`116`		`- )`
	`112`	`+ lambda params: {*params, "messages": [params["messages"], *message_params]}`
`117`	`113`	`)`
`118`	`114`	`self._cached_tool_call_response = None`
`119`	`115`