diff --git a/src/dawg.pyx b/src/dawg.pyx
index 133c7fc..94ed327 100644
--- a/src/dawg.pyx
+++ b/src/dawg.pyx
@@ -86,7 +86,7 @@ cdef class DAWG:
     cpdef bint b_has_key(self, bytes key) except -1:
         return self.dct.Contains(key, len(key))
 
-    cpdef bytes tobytes(self):
+    cpdef bytes tobytes(self) except +:
         """
         Return raw DAWG content as bytes.
         """
@@ -176,6 +176,17 @@ cdef class DAWG:
 
     def _file_size(self):
         return self.dct.file_size()
+    
+    cpdef BaseType root(self):
+        return self.dct.root()
+
+    cpdef (bint, BaseType) follow(self, unicode label, BaseType index):
+        cdef bytes _label = <bytes>label.encode('utf8')
+        rs = self.dct.Follow(_label, &index)
+        return rs, index
+
+    def has_value(self, index: BaseType) -> bool:
+        return self._has_value(index) 
 
     cdef bint _has_value(self, BaseType index):
         return  self.dct.has_value(index)