[mmf][fix]Assertion message to match if condition

Summary: Correction of assertion message on the first dimension . Reviewed By: apsdehal Differential Revision: D22860233 fbshipit-source-id: d8280d81a84ee23b51512f987302b4397318b0a5
facebookresearch · Aug 1, 2020 · 9ba7af6 · 9ba7af6
1 parent 7cdbf8c
commit 9ba7af6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/mmf/common/sample.py b/mmf/common/sample.py
@@ -307,7 +307,7 @@ def add_field(self, field, data):
                 "have same size as existing tensor "
                 "fields in SampleList. "
                 "Passed size: {}, Required size: {}".format(
-                    len(data), len(self[fields[0]])
+                    len(data), len(self[tensor_field])
                 )
             )