Adding docstring for ExceptionRenderError.

Signed-off-by: Stefan Habel <[email protected]>

source/PyMaterialX/PyMaterialXRender/PyShaderRenderer.cpp

@@ -34,6 +34,13 @@ void bindPyShaderRenderer(py::module& mod)
     :see: https://materialx.org/docs/api/class_shader_renderer.html)docstring";
 
     static py::exception<mx::ExceptionRenderError> pyExceptionRenderError(mod, "ExceptionRenderError");
+    mod.attr("ExceptionRenderError").doc() = R"docstring(
+    A type of exception that is raised when a rendering operation fails.
+
+    Optionally stores an additional error log, which can be used to
+    store and retrieve shader compilation errors.
+
+    :see: https://materialx.org/docs/api/class_exception_render_error.html)docstring";
 
     py::register_exception_translator(
         [](std::exception_ptr errPtr)