diff --git a/fastNLP/core/dataset.py b/fastNLP/core/dataset.py
index 39af672c..550ef7d9 100644
--- a/fastNLP/core/dataset.py
+++ b/fastNLP/core/dataset.py
@@ -200,6 +200,12 @@ class DataSet(object):
                 raise KeyError("{} is not a valid field name.".format(name))
         return self
 
+    def get_input_name(self):
+        return [name for name, field in self.field_arrays.items() if field.is_input]
+
+    def get_target_name(self):
+        return [name for name, field in self.field_arrays.items() if field.is_target]
+
     def __getattr__(self, item):
         if item in self.field_arrays:
             return self.field_arrays[item]
diff --git a/fastNLP/core/utils.py b/fastNLP/core/utils.py
index 6a284ab9..ca38e45e 100644
--- a/fastNLP/core/utils.py
+++ b/fastNLP/core/utils.py
@@ -4,7 +4,7 @@ import inspect
 from collections import namedtuple
 from collections import Counter
 
-CheckRes = namedtuple('CheckRes', ['missing', 'unused', 'duplicated'], verbose=True)
+CheckRes = namedtuple('CheckRes', ['missing', 'unused', 'duplicated', 'required', 'all_needed'], verbose=True)
 
 
 def save_pickle(obj, pickle_path, file_name):
@@ -82,4 +82,8 @@ def _check_arg_dict_list(func, args):
     input_args = set(input_arg_count.keys())
     missing = list(require_args - input_args)
     unused = list(input_args - all_args)
-    return CheckRes(missing=missing, unused=unused, duplicated=duplicated)
+    return CheckRes(missing=missing,
+                    unused=unused,
+                    duplicated=duplicated,
+                    required=list(require_args),
+                    all_needed=list(all_args))