tmp: printf debugging

src/binding/python/Attributable.cpp

@@ -338,16 +338,22 @@ struct char_to_explicit_char<false>
 template <typename TargetType>
 std::optional<TargetType> tryCast(py::object const &obj)
 {
+    std::cout << "tryCast<" << determineDatatype<TargetType>() << ">()"
+              << std::endl;
     try
     {
-        return obj.cast<TargetType>();
+        auto res = obj.cast<TargetType>();
+        std::cout << "\tSUCCESS" << std::endl;
+        return res;
     }
     catch (py::cast_error const &)
     {
+        std::cout << "\tFAILURE 1" << std::endl;
         return std::nullopt;
     }
     catch (py::value_error const &err)
     {
+        std::cout << "\tFAILURE 2" << std::endl;
         return std::nullopt;
     }
 }
@@ -427,6 +433,11 @@ bool setAttributeFromObject(
     pybind11::dtype datatype)
 {
     Datatype requestedDatatype = dtype_from_numpy(datatype);
+    std::cout << "Setting attribute '" << key << "' with type "
+              << obj.get_type() << "' and requested type " << datatype
+              << ", i.e. openPMD type " << requestedDatatype << "\n\t'char' is "
+              << (std::is_signed_v<char> ? "signed" : "unsigned")
+              << " on the platform" << std::endl;
     return switchNonVectorType<SetAttributeFromObject>(
         requestedDatatype, attr, key, obj);
 }