def symbols_to_radii():
'''Mapper from symbol pairs to sum of covalent radii.'''
df = Isotope.to_frame().drop_duplicates('symbol')
symbol = df['symbol'].values
radius = df['radius'].values
symbols = sum_product_pair(symbol, symbol)
s = pd.Series(sum_product_pair_f8(radius, radius))
s.index = symbols
return s
def test_sum_product_pair(self):
"""
Test :func:`~exa.math.misc.summation.sum_product_pair`. This function
should work regardless of types.
"""
r = sum_product_pair(self.s0, self.s0)
self.assertIsInstance(r, list)
self.assertEqual(len(r), 250000)
r = sum_product_pair(self.s0, self.s1)
self.assertEqual(len(r), 50000)
self.assertTrue(all(isinstance(rr, str) for rr in r))
r = sum_product_pair(self.n0, self.n0)
self.assertIsInstance(r, list)
self.assertEqual(len(r), 250000)
r = sum_product_pair(self.n0, self.n1)
self.assertEqual(len(r), 50000)
self.assertTrue(all(isinstance(rr, (np.int32, np.int64)) for rr in r))
r = sum_product_pair(self.f0, self.f0)
self.assertEqual(len(r), 250000)
self.assertTrue(all(isinstance(rr, (np.float32, np.float64)) for rr in r))
