refactor: update NVIDIA System-Assist client initialization and error handling (#8278)

* refactor: Improve NVIDIA System-Assist client initialization and error handling

- Updated the `maybe_register_rise_client` method to enhance error handling and remove unnecessary context management.
- Clarified the component description to specify Windows-only support.
- Improved input prompt information with an example for better user guidance.

* refactor: use constant for rise_initialized key in NvidiaSystemAssistComponent

Replaced hardcoded string with a constant for the rise_initialized key to improve code readability and maintainability.

src/backend/base/langflow/components/nvidia/system_assist.py

@@ -1,46 +1,29 @@
 import asyncio
-import contextlib
 
 from langflow.custom.custom_component.component_with_cache import ComponentWithCache
 from langflow.io import MessageTextInput, Output
 from langflow.schema import Message
 from langflow.services.cache.utils import CacheMiss
 
+RISE_INITIALIZED_KEY = "rise_initialized"
+
 
 class NvidiaSystemAssistComponent(ComponentWithCache):
     display_name = "NVIDIA System-Assist"
     description = (
-        "Prompts NVIDIA System-Assist to interact with the NVIDIA GPU Driver. "
+        "(Windows only) Prompts NVIDIA System-Assist to interact with the NVIDIA GPU Driver. "
         "The user may query GPU specifications, state, and ask the NV-API to perform "
         "several GPU-editing acations. The prompt must be human-readable language."
-        "(Windows only)"
     )
     documentation = "https://docs.langflow.org/components-custom-components"
     icon = "NVIDIA"
     rise_initialized = False
 
-    def maybe_register_rise_client(self):
-        with contextlib.suppress(ImportError):
-            from gassist.rise import register_rise_client
-        rise_initialized = self._shared_component_cache.get("rise_initialized")
-        if not isinstance(rise_initialized, CacheMiss) and rise_initialized:
-            return
-        self.log("Initializing Rise Client")
-        try:
-            register_rise_client()
-            self._shared_component_cache.set(key="rise_initialized", value=True)
-        except NameError as e:
-            msg = "NVIDIA System-Assist is Windows only and not supported on this platform"
-            raise ValueError(msg) from e
-        except Exception as e:
-            msg = f"An error occurred initializing NVIDIA System-Assist: {e}"
-            raise ValueError(msg) from e
-
     inputs = [
         MessageTextInput(
             name="prompt",
             display_name="System-Assist Prompt",
-            info="Enter a prompt for NVIDIA System-Assist to process.",
+            info="Enter a prompt for NVIDIA System-Assist to process. Example: 'What is my GPU?'",
             value="",
             tool_mode=True,
         ),
@@ -50,9 +33,30 @@ class NvidiaSystemAssistComponent(ComponentWithCache):
         Output(display_name="Response", name="response", method="sys_assist_prompt"),
     ]
 
+    def maybe_register_rise_client(self):
+        try:
+            from gassist.rise import register_rise_client
+
+            rise_initialized = self._shared_component_cache.get(RISE_INITIALIZED_KEY)
+            if not isinstance(rise_initialized, CacheMiss) and rise_initialized:
+                return
+            self.log("Initializing Rise Client")
+
+            register_rise_client()
+            self._shared_component_cache.set(key=RISE_INITIALIZED_KEY, value=True)
+        except ImportError as e:
+            msg = "NVIDIA System-Assist is Windows only and not supported on this platform"
+            raise ValueError(msg) from e
+        except Exception as e:
+            msg = f"An error occurred initializing NVIDIA System-Assist: {e}"
+            raise ValueError(msg) from e
+
     async def sys_assist_prompt(self) -> Message:
-        with contextlib.suppress(ImportError):
+        try:
             from gassist.rise import send_rise_command
+        except ImportError as e:
+            msg = "NVIDIA System-Assist is Windows only and not supported on this platform"
+            raise ValueError(msg) from e
 
         self.maybe_register_rise_client()