Add RNN LM rescore for offline ASR with modified_beam_search (#125)

sherpa-onnx/python/csrc/offline-lm-config.cc

@@ -0,0 +1,23 @@
+// sherpa-onnx/python/csrc/offline-lm-config.cc
+//
+// Copyright (c)  2023  Xiaomi Corporation
+
+#include "sherpa-onnx/python/csrc/offline-lm-config.h"
+
+#include <string>
+
+#include "sherpa-onnx//csrc/offline-lm-config.h"
+
+namespace sherpa_onnx {
+
+void PybindOfflineLMConfig(py::module *m) {
+  using PyClass = OfflineLMConfig;
+  py::class_<PyClass>(*m, "OfflineLMConfig")
+      .def(py::init<const std::string &, float>(), py::arg("model"),
+           py::arg("scale"))
+      .def_readwrite("model", &PyClass::model)
+      .def_readwrite("scale", &PyClass::scale)
+      .def("__str__", &PyClass::ToString);
+}
+
+}  // namespace sherpa_onnx