Prettify error message on jobs

client/qiskit_serverless/core/job.py

@@ -189,7 +189,16 @@ def filtered_logs(self, **kwargs) -> str:
 
     def error_message(self):
         """Returns the execution error message."""
-        return self._job_service.result(self.job_id) if self.status() == "ERROR" else ""
+        error = (
+            self._job_service.result(self.job_id) if self.status() == "ERROR" else ""
+        )
+        try:
+            pretty_error = error.strip('"').encode().decode("unicode_escape")
+        except UnicodeDecodeError:
+            logging.warning("Error decoding error message, returning raw message.")
+            return error
+
+        return pretty_error
 
     def result(self, wait=True, cadence=30, verbose=False, maxwait=0):
         """Return results of the job.

client/tests/core/test_job.py

@@ -18,6 +18,7 @@
     ENV_ACCESS_TRIAL,
 )
 from qiskit_serverless.core.job import (
+    Job,
     is_running_in_serverless,
     save_result,
     is_trial,
@@ -104,6 +105,30 @@ def test_filtered_logs(self):
             "id", include="This is the l.+", exclude="the.+a.+l"
         )
 
+    @patch("requests.get", Mock(return_value=ResponseMock()))
+    def test_error_message(self):
+        """Tests job filtered log."""
+        client = ServerlessClient(host="host", token="token", version="version")
+        client.status = MagicMock(
+            return_value="ERROR",
+        )
+        client.result = MagicMock(
+            return_value=(
+                '"This is the line \\"1\\"\\n'
+                "This is the second line\\n"
+                'OK.  This is the last line.\\n"'
+            ),
+        )
+        job = Job(
+            job_id="job_id",
+            job_service=client,
+        )
+        assert (
+            'This is the line "1"\n'
+            "This is the second line\n"
+            "OK.  This is the last line.\n"
+        ) == job.error_message()
+
 
 class TestRunningAsServerlessProgram:
     """Test ``is_running_in_serverless()``."""