From cbe3b7960414b03f8e98336c3fcd7b367de441ca Mon Sep 17 00:00:00 2001
From: Jerome Carnis <carnis_jerome@yahoo.fr>
Date: Mon, 17 Jan 2022 21:02:25 +0100
Subject: [PATCH] add more explicit error message

---
 bcdi/utils/validation.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/bcdi/utils/validation.py b/bcdi/utils/validation.py
index ac8911208..8b23a9b74 100644
--- a/bcdi/utils/validation.py
+++ b/bcdi/utils/validation.py
@@ -269,7 +269,8 @@ def valid_item(
 
     # check the type of obj
     if value is not None and not isinstance(value, allowed_types):
-        raise TypeError(f"{name}: wrong type for value, allowed is {allowed_types}")
+        raise TypeError(f"{name}: wrong type for value, "
+                        f"allowed is {allowed_types}, got {type(value)}")
 
     # check min_included
     if min_included is not None and value is not None: