Description
df=DataFrame([[1,2,3],[4,5,6]],columns=['a','a','b'])
for k,v in df.iteritems():
self.assertEqual(type(v),Series){{ message }}
df=DataFrame([[1,2,3],[4,5,6]],columns=['a','a','b'])
for k,v in df.iteritems():
self.assertEqual(type(v),Series)