mirror of
https://github.com/hwchase17/langchain.git
synced 2025-10-22 09:41:52 +00:00
e36e25fe2f
This allows to use PEP604 syntax for `ToolNode` error handlers
```python
def error_handler(e: ValueError | ToolException) -> str:
return "error"
ToolNode(my_tool, handle_tool_errors=error_handler).invoke(...)
```
Without this change, this fails with `AttributeError: 'types.UnionType'
object has no attribute '__mro__'`