--- a/src/PythonHandler.h	Thu Dec 13 19:40:29 2018 +0100
+++ b/src/PythonHandler.h	Fri Dec 14 00:14:58 2018 +0100
@@ -69,7 +69,7 @@
 		pythonProgramName = Py_DecodeLocale("relpipe-tr-python", NULL);
 		Py_SetProgramName(pythonProgramName);
 		Py_Initialize();
-		
+
 		if (arguments.size() == 2) {
 			relationNameRegEx = wregex(arguments[0]);
 			pythonCode = arguments[1];
@@ -103,7 +103,24 @@
 			currentAttributeIndex++;
 
 			if (currentAttributeIndex > 0 && currentAttributeIndex % currentRecord.size() == 0) {
+
+				PyObject* pyModule;
+				PyObject* pyDict;
+				PyObject* pyWhere;
+
 				PyRun_SimpleString(convertor.to_bytes(pythonCode).c_str());
+				
+				// FIXME: check Python error and throw exception
+				// if (PyErr_Occurred()) throw cli::RelpipeCLIException(L"Python code failed.", cli::CLI::EXIT_CODE_UNEXPECTED_ERROR); // TODO: review exit code
+				// if (PyErr_Occurred()) { PyErr_Print(); PyErr_Clear(); }
+
+				pyModule = PyImport_AddModule((char*) "__main__"); // FIXME: variable and Py_DecodeLocale ?
+				pyDict = PyModule_GetDict(pyModule);
+				pyWhere = PyDict_GetItemString(pyDict, "WHERE");
+
+				if (pyWhere) includeCurrentRecord = PyLong_AsLong(pyWhere);
+
+
 				if (includeCurrentRecord) for (string_t v : currentRecord) relationalWriter->writeAttribute(v);
 				includeCurrentRecord = true;
 			}