From d5c12225725dcdb7eac3649673738f73d651e403 Mon Sep 17 00:00:00 2001
From: Ziyang Hu <hu.ziyang@cantab.net>
Date: Sat, 14 Jan 2023 15:43:52 +0800
Subject: [PATCH] improve python API

---
 cozo-lib-python/src/lib.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/cozo-lib-python/src/lib.rs b/cozo-lib-python/src/lib.rs
index a754c102..c1113e14 100644
--- a/cozo-lib-python/src/lib.rs
+++ b/cozo-lib-python/src/lib.rs
@@ -167,7 +167,11 @@ impl CozoDbPy {
                 Ok(rows) => Ok(named_rows_to_py(rows, py)),
                 Err(err) => {
                     let reports = format_error_as_json(err, Some(query)).to_string();
-                    Err(PyException::new_err(reports))
+                    let json_mod = py.import("json")?;
+                    let loads_fn = json_mod.getattr("loads")?;
+                    let args = PyTuple::new(py, [PyString::new(py, &reports)]);
+                    let msg = loads_fn.call1(args)?;
+                    Err(PyException::new_err(PyObject::from(msg)))
                 }
             }
         } else {