def _check(frame):
dense_frame = frame.to_dense()
wp = WidePanel.from_dict({"foo": frame})
from_dense_lp = wp.to_long()
from_sparse_lp = spm.stack_sparse_frame(frame)
self.assert_(np.array_equal(from_dense_lp.values, from_sparse_lp.values))
def test_to_dense(self):
dwp = self.panel.to_dense()
dwp2 = WidePanel.from_dict(self.data_dict)
assert_panel_equal(dwp, dwp2)
def test_dense_to_sparse(self):
wp = WidePanel.from_dict(self.data_dict)
dwp = wp.to_sparse()
self.assert_(isinstance(dwp['ItemA']['A'], SparseSeries))
