From eeca686138eae94fd94a205b464ea22218b4a32e Mon Sep 17 00:00:00 2001
From: David Zwicker <david.zwicker@ds.mpg.de>
Date: Sat, 2 Mar 2024 08:52:44 +0100
Subject: [PATCH] Improved error message

---
 pde/pdes/pde.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pde/pdes/pde.py b/pde/pdes/pde.py
index 979739d6..bfab7790 100644
--- a/pde/pdes/pde.py
+++ b/pde/pdes/pde.py
@@ -191,7 +191,7 @@ def __init__(
                 self._logger.warning("Found default BCs in `bcs` and `bc_ops`")
             bcs["*:*"] = bc  # append default boundary conditions
         else:
-            raise TypeError('`bc_ops` must be a dictionary')
+            raise TypeError(f'`bc_ops` must be a dictionary, but got {type(bc_ops)}"')
 
         self.bcs: dict[str, Any] = {}
         for key_str, value in bcs.items():