fix: Handle missing sensors command gracefully

monitor_agent.py

@@ -45,18 +45,28 @@ def get_network_metrics():
 
 def get_cpu_temperature():
     """Gets the CPU temperature using the sensors command."""
+    try:
+        subprocess.check_output(["sensors"], text=True)
+    except (subprocess.CalledProcessError, FileNotFoundError):
+        print("Error: 'sensors' command not found. Please install lm-sensors.")
+        return {"cpu_temperature": "N/A"}
     try:
         sensors_output = subprocess.check_output(["sensors"], text=True)
         parsed_sensors = jc.parse('sensors', sensors_output)
         # This is a simplified example, you may need to adjust the parsing logic based on your specific hardware
         cpu_temp = parsed_sensors[0]['values'][0]['input']
         return {"cpu_temperature": cpu_temp}
-    except (subprocess.CalledProcessError, FileNotFoundError, KeyError, IndexError) as e:
+    except (subprocess.CalledProcessError, FileNotFoundError, KeyError, IndexError, jc.exceptions.ParseError) as e:
         print(f"Error getting CPU temperature: {e}")
-        return None
+        return {"cpu_temperature": "N/A"}
 
 def get_gpu_temperature():
     """Gets the GPU temperature using the sensors command."""
+    try:
+        subprocess.check_output(["sensors"], text=True)
+    except (subprocess.CalledProcessError, FileNotFoundError):
+        print("Error: 'sensors' command not found. Please install lm-sensors.")
+        return {"gpu_temperature": "N/A"}
     try:
         sensors_output = subprocess.check_output(["sensors"], text=True)
         parsed_sensors = jc.parse('sensors', sensors_output)
@@ -67,7 +77,7 @@ def get_gpu_temperature():
                 gpu_temp = adapter['values'][0]['input']
                 return {"gpu_temperature": gpu_temp}
         return {"gpu_temperature": "N/A"}
-    except (subprocess.CalledProcessError, FileNotFoundError, KeyError, IndexError) as e:
+    except (subprocess.CalledProcessError, FileNotFoundError, KeyError, IndexError, jc.exceptions.ParseError) as e:
         print(f"Error getting GPU temperature: {e}")
         return {"gpu_temperature": "N/A"}