Update src/neurostatslib/base_class.py

Co-authored-by: William F. Broderick <billbrod@gmail.com>

Author: BalzaniEdoardo

src/neurostatslib/base_class.py

@@ -347,9 +347,8 @@ def _check_and_convert_params(
             raise ValueError("Params needs to be array-like of length two.")
 
         try:
-            params = jnp.asarray(params[0], dtype=data_type), jnp.asarray(
-                params[1], dtype=data_type
-            )
+            params = (jnp.asarray(params[0], dtype=data_type), 
+                      jnp.asarray(params[1], dtype=data_type))
         except (ValueError, TypeError):
             raise TypeError(
                 "Initial parameters must be array-like of array-like objects"