PyInterpreter.BornAgain.importScript: check if the loaded BornAgain module is valid

PyCore/Embed/PyInterpreter.cpp

@@ -649,8 +649,12 @@ PyObjectPtr PyInterpreter::BornAgain::importScript(const std::string& script,
                                                    const std::string& path)
 {
     PyObjectPtr ba_pymodule{PyInterpreter::BornAgain::import(path)};
-    // TODO: Check ba module
 
+    if (!ba_pymodule.valid()) {
+        ba_pymodule.discard();
+        throw std::runtime_error(
+            errorDescription("Cannot import BornAgain from path '" + path + "'"));
+    }
     PyObject* pCompiledFn = Py_CompileString(script.c_str(), "", Py_file_input);
     if (!pCompiledFn) {
         ba_pymodule.discard();