Use default value for default_

Author: lqf96

include/pybind11/pytypes.h

@@ -1292,25 +1292,22 @@ class dict : public object {
         return PyDict_Contains(m_ptr, detail::object_or_cast(std::forward<T>(key)).ptr()) == 1;
     }
 
-    object get(handle key, handle default_) const {
+    object get(handle key, handle default_ = none()) const {
         if (PyObject *result = PyDict_GetItem(m_ptr, key.ptr())) {
             return reinterpret_borrow<object>(result);
         } else {
             return reinterpret_borrow<object>(default_);
         }
     }
 
-    object get(const char *key, handle default_) const {
+    object get(const char *key, handle default_ = none()) const {
         if (PyObject *result = PyDict_GetItemString(m_ptr, key)) {
             return reinterpret_borrow<object>(result);
         } else {
             return reinterpret_borrow<object>(default_);
         }
     }
 
-    object get(handle key) const { return get(key, none()); }
-    object get(const char *key) const { return get(key, none()); }
-
 private:
     /// Call the `dict` Python type -- always returns a new reference
     static PyObject *raw_dict(PyObject *op) {