concat Series[sparse] converts sp_values to NaN · Issue #24371 · pandas-dev/pandas (original) (raw)

In [1]: import pandas as pd

In [2]: s = pd.Series(pd.SparseArray([0, 1], fill_value=0))

In [3]: pd.concat([s, s], axis=1, keys=['a', 'b']) Out[3]: a b 0 NaN NaN 1 1.0 1.0