[GitHub] szha commented on a change in pull request #9645: Fix DataBatch.__str__ for cases where we don't have labels.

[GitBox <gi...@apache.org>]

szha commented on a change in pull request #9645: Fix DataBatch.__str__ for cases where we don't have labels.
URL: https://github.com/apache/incubator-mxnet/pull/9645#discussion_r165112582
 
 

 ##########
 File path: tests/python/unittest/test_io.py
 ##########
 @@ -252,6 +252,16 @@ def check_libSVMIter_news_data():
     check_libSVMIter_synthetic()
     check_libSVMIter_news_data()
 
+
+def test_DataBatch():
+    from nose.tools import eq_
+    from mxnet.io import DataBatch
+    batch = DataBatch(data=[mx.nd.ones((2,3))])
+    eq_(str(batch),'DataBatch: data shapes: [(2, 3)] label shapes: None')
+    batch = DataBatch(data=[mx.nd.ones((2,3)), mx.nd.ones((7,8))], label=[mx.nd.ones((4,5))])
+    eq_(str(batch),'DataBatch: data shapes: [(2, 3), (7, 8)] label shapes: [(4, 5)]')
 
 Review comment:
   space after comma

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