common.py 文件源码

def test_numpy_ufuncs(self):
        # test ufuncs of numpy 1.9.2. see:
        # http://docs.scipy.org/doc/numpy/reference/ufuncs.html

        # some functions are skipped because it may return different result
        # for unicode input depending on numpy version

        for name, idx in compat.iteritems(self.indices):
            for func in [np.exp, np.exp2, np.expm1, np.log, np.log2, np.log10,
                         np.log1p, np.sqrt, np.sin, np.cos, np.tan, np.arcsin,
                         np.arccos, np.arctan, np.sinh, np.cosh, np.tanh,
                         np.arcsinh, np.arccosh, np.arctanh, np.deg2rad,
                         np.rad2deg]:
                if isinstance(idx, pd.tseries.base.DatetimeIndexOpsMixin):
                    # raise TypeError or ValueError (PeriodIndex)
                    # PeriodIndex behavior should be changed in future version
                    with tm.assertRaises(Exception):
                        func(idx)
                elif isinstance(idx, (Float64Index, Int64Index)):
                    # coerces to float (e.g. np.sin)
                    result = func(idx)
                    exp = Index(func(idx.values), name=idx.name)
                    self.assert_index_equal(result, exp)
                    self.assertIsInstance(result, pd.Float64Index)
                else:
                    # raise AttributeError or TypeError
                    if len(idx) == 0:
                        continue
                    else:
                        with tm.assertRaises(Exception):
                            func(idx)

            for func in [np.isfinite, np.isinf, np.isnan, np.signbit]:
                if isinstance(idx, pd.tseries.base.DatetimeIndexOpsMixin):
                    # raise TypeError or ValueError (PeriodIndex)
                    with tm.assertRaises(Exception):
                        func(idx)
                elif isinstance(idx, (Float64Index, Int64Index)):
                    # results in bool array
                    result = func(idx)
                    exp = func(idx.values)
                    self.assertIsInstance(result, np.ndarray)
                    tm.assertNotIsInstance(result, Index)
                else:
                    if len(idx) == 0:
                        continue
                    else:
                        with tm.assertRaises(Exception):
                            func(idx)