error handling

nostr_dvm/dvm.py

@@ -493,6 +493,8 @@ class DVM:
                                         if line != '\n':
                                             result += line
                                 os.remove(os.path.abspath('output.txt'))
+                                if result.startswith("Error:"):
+                                    raise Exception
                             else:  # Some components might have issues with running code in otuside venv.
                                 # We install locally in these cases for now
                                 result = dvm.process(request_form)

nostr_dvm/interfaces/dvmtaskinterface.py

@@ -145,5 +145,6 @@ def process_venv(identifier):
         result = dvm.process(json.loads(args.request))
         DVMTaskInterface.write_output(result, args.output)
     except Exception as e:
-        DVMTaskInterface.write_output(str(e), args.output)
+        DVMTaskInterface.write_output("Error: " + str(e), args.output)
+        raise Exception