fix a tiny bug

test/io/pipe/test_classification.py

@@ -45,7 +45,7 @@ class TestRunClassificationPipe(unittest.TestCase):
             'dbpedia': ('test/data_for_tests/io/dbpedia', DBPediaPipe, (5, 14), (496, 14), False),
             'ChnSentiCorp': ('test/data_for_tests/io/ChnSentiCorp', ChnSentiCorpPipe, (6, 6, 6), (529, 1296, 1483, 2), False),
             'Chn-THUCNews': ('test/data_for_tests/io/THUCNews', THUCNewsPipe, (9, 9, 9), (1864, 9), False),
-            'Chn-WeiboSenti100k': ('test/data_for_tests/io/WeiboSenti100k', WeiboSenti100kPipe, (7, 6, 6), (452, 2), False),
+            'Chn-WeiboSenti100k': ('test/data_for_tests/io/WeiboSenti100k', WeiboSenti100kPipe, (6, 6, 7), (452, 2), False),
         }
         for k, v in data_set_dict.items():
             path, pipe, data_set, vocab, warns = v