Merge pull request #5360 from jtratner/only-print-conditionally-in-tests

TST/CLN: Only print on test failures.

Author: jtratner

pandas/stats/tests/test_moments.py

@@ -635,8 +635,11 @@ def test_corr_sanity(self):
         for i in range(10):
             df = DataFrame(np.random.rand(30,2))
             res = mom.rolling_corr(df[0],df[1],5,center=True)
-            print( res)
-            self.assertTrue(all([np.abs(np.nan_to_num(x)) <=1 for x in res]))
+            try:
+                self.assertTrue(all([np.abs(np.nan_to_num(x)) <=1 for x in res]))
+            except:
+                print(res)
+
 
     def test_flex_binary_frame(self):
         def _check(method):