In [1]: import pandas as pd; import numpy as np In [2]: sparse = pd.SparseArray([0.0, 3.5], fill_value=0.0) ...: r1, r2 = np.modf(sparse) ...: --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) <ipython-input-2-1f85037f7dc7> in <module> 1 sparse = pd.SparseArray([0.0, 3.5], fill_value=0.0) ----> 2 r1, r2 = np.modf(sparse) ~/sandbox/pandas/pandas/core/arrays/sparse.py in __array_ufunc__(self, ufunc, method, *inputs, **kwargs) 1700 return self._simple_new(sp_values, 1701 self.sp_index, -> 1702 SparseDtype(sp_values.dtype, fill_value)) 1703 1704 result = getattr(ufunc, method)(*[np.asarray(x) for x in inputs], AttributeError: 'tuple' object has no attribute 'dtype'