addressing comments to pull request #21514 for GH issue #18644

pandas/tests/indexes/multi/test_compat.py

@@ -0,0 +1,144 @@
+# -*- coding: utf-8 -*-
+
+
+import numpy as np
+import pandas as pd
+import pandas.util.testing as tm
+import pytest
+from pandas import (CategoricalIndex, DatetimeIndex, Float64Index, Index,
+                    Int64Index, IntervalIndex, MultiIndex, PeriodIndex,
+                    RangeIndex, Series, TimedeltaIndex, UInt64Index, compat,
+                    isna)
+from pandas._libs.tslib import iNaT
+from pandas.compat import PY3
+from pandas.core.indexes.base import InvalidIndexError
+from pandas.core.indexes.datetimelike import DatetimeIndexOpsMixin
+from pandas.compat import PY3, PYPY, lrange, lzip, range, u, long
+import numpy as np
+
+
+
+def test_numeric_compat(_index):
+
+    idx = _index
+    tm.assert_raises_regex(TypeError, "cannot perform __mul__",
+                           lambda: idx * 1)
+    tm.assert_raises_regex(TypeError, "cannot perform __rmul__",
+                           lambda: 1 * idx)
+
+    div_err = "cannot perform __truediv__" if PY3 \
+        else "cannot perform __div__"
+    tm.assert_raises_regex(TypeError, div_err, lambda: idx / 1)
+    div_err = div_err.replace(' __', ' __r')
+    tm.assert_raises_regex(TypeError, div_err, lambda: 1 / idx)
+    tm.assert_raises_regex(TypeError, "cannot perform __floordiv__",
+                           lambda: idx // 1)
+    tm.assert_raises_regex(TypeError, "cannot perform __rfloordiv__",
+                           lambda: 1 // idx)
+
+
+def test_logical_compat(_index):
+    idx = _index
+    tm.assert_raises_regex(TypeError, 'cannot perform all',
+                           lambda: idx.all())
+    tm.assert_raises_regex(TypeError, 'cannot perform any',
+                           lambda: idx.any())
+
+
+def test_boolean_context_compat(_index):
+
+    # boolean context compat
+    idx = _index
+
+    def f():
+        if idx:
+            pass
+
+    tm.assert_raises_regex(ValueError, 'The truth value of a', f)
+
+
+def test_boolean_context_compat2():
+
+    # boolean context compat
+    # GH7897
+    i1 = MultiIndex.from_tuples([('A', 1), ('A', 2)])
+    i2 = MultiIndex.from_tuples([('A', 1), ('A', 3)])
+    common = i1.intersection(i2)
+
+    def f():
+        if common:
+            pass
+
+    tm.assert_raises_regex(ValueError, 'The truth value of a', f)
+
+
+def test_inplace_mutation_resets_values():
+    levels = [['a', 'b', 'c'], [4]]
+    levels2 = [[1, 2, 3], ['a']]
+    labels = [[0, 1, 0, 2, 2, 0], [0, 0, 0, 0, 0, 0]]
+
+    mi1 = MultiIndex(levels=levels, labels=labels)
+    mi2 = MultiIndex(levels=levels2, labels=labels)
+    vals = mi1.values.copy()
+    vals2 = mi2.values.copy()
+
+    assert mi1._tuples is not None
+
+    # Make sure level setting works
+    new_vals = mi1.set_levels(levels2).values
+    tm.assert_almost_equal(vals2, new_vals)
+
+    # Non-inplace doesn't kill _tuples [implementation detail]
+    tm.assert_almost_equal(mi1._tuples, vals)
+
+    # ...and values is still same too
+    tm.assert_almost_equal(mi1.values, vals)
+
+    # Inplace should kill _tuples
+    mi1.set_levels(levels2, inplace=True)
+    tm.assert_almost_equal(mi1.values, vals2)
+
+    # Make sure label setting works too
+    labels2 = [[0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0]]
+    exp_values = np.empty((6,), dtype=object)
+    exp_values[:] = [(long(1), 'a')] * 6
+
+    # Must be 1d array of tuples
+    assert exp_values.shape == (6,)
+    new_values = mi2.set_labels(labels2).values
+
+    # Not inplace shouldn't change
+    tm.assert_almost_equal(mi2._tuples, vals2)
+
+    # Should have correct values
+    tm.assert_almost_equal(exp_values, new_values)
+
+    # ...and again setting inplace should kill _tuples, etc
+    mi2.set_labels(labels2, inplace=True)
+    tm.assert_almost_equal(mi2.values, new_values)
+
+
+def test_ndarray_compat_properties(_index, _compat_props):
+    idx = _index
+    assert idx.T.equals(idx)
+    assert idx.transpose().equals(idx)
+
+    values = idx.values
+    for prop in _compat_props:
+        assert getattr(idx, prop) == getattr(values, prop)
+
+    # test for validity
+    idx.nbytes
+    idx.values.nbytes
+
+
+def test_compat(indices):
+    assert indices.tolist() == list(indices)
+
+def test_pickle_compat_construction(_holder):
+    # this is testing for pickle compat
+    if _holder is None:
+        return
+
+    # need an object to create with
+    pytest.raises(TypeError, _holder)

pandas/tests/indexes/multi/test_constructor.py

@@ -476,3 +476,34 @@ def test_from_product_iterator():
     with tm.assert_raises_regex(
             TypeError, "Input must be a list / sequence of iterables."):
         MultiIndex.from_product(0)
+
+
+def test_create_index_existing_name(_index):
+
+    # GH11193, when an existing index is passed, and a new name is not
+    # specified, the new index should inherit the previous object name
+    index = _index
+    index.names = ['foo', 'bar']
+    result = pd.Index(index)
+    tm.assert_index_equal(
+        result, Index(Index([('foo', 'one'), ('foo', 'two'),
+                                ('bar', 'one'), ('baz', 'two'),
+                                ('qux', 'one'), ('qux', 'two')],
+                            dtype='object'),
+                        names=['foo', 'bar']))
+
+    result = pd.Index(index, names=['A', 'B'])
+    tm.assert_index_equal(
+        result,
+        Index(Index([('foo', 'one'), ('foo', 'two'), ('bar', 'one'),
+                        ('baz', 'two'), ('qux', 'one'), ('qux', 'two')],
+                    dtype='object'), names=['A', 'B']))
+
+def test_tuples_with_name_string():
+    # GH 15110 and GH 14848
+
+    li = [(0, 0, 1), (0, 1, 0), (1, 0, 0)]
+    with pytest.raises(ValueError):
+        pd.Index(li, name='abc')
+    with pytest.raises(ValueError):
+        pd.Index(li, name='a')

pandas/tests/indexes/multi/test_contains.py

@@ -2,6 +2,10 @@
 
 import pandas as pd
 from pandas import MultiIndex
+import pytest
+from pandas.compat import PY3, PYPY, lrange, lzip, range, u
+import numpy as np
+import pandas.util.testing as tm
 
 
 def test_contains_top_level():
@@ -25,3 +29,101 @@ def test_contains(_index):
     assert ('foo', 'two') in _index
     assert ('bar', 'two') not in _index
     assert None not in _index
+
+
+@pytest.mark.skipif(not PYPY, reason="tuples cmp recursively on PyPy")
+def test_isin_nan_pypy():
+    idx = MultiIndex.from_arrays([['foo', 'bar'], [1.0, np.nan]])
+    tm.assert_numpy_array_equal(idx.isin([('bar', np.nan)]),
+                                np.array([False, True]))
+    tm.assert_numpy_array_equal(idx.isin([('bar', float('nan'))]),
+                                np.array([False, True]))
+
+
+def test_isin():
+    values = [('foo', 2), ('bar', 3), ('quux', 4)]
+
+    idx = MultiIndex.from_arrays([['qux', 'baz', 'foo', 'bar'], np.arange(
+        4)])
+    result = idx.isin(values)
+    expected = np.array([False, False, True, True])
+    tm.assert_numpy_array_equal(result, expected)
+
+    # empty, return dtype bool
+    idx = MultiIndex.from_arrays([[], []])
+    result = idx.isin(values)
+    assert len(result) == 0
+    assert result.dtype == np.bool_
+
+
+@pytest.mark.skipif(PYPY, reason="tuples cmp recursively on PyPy")
+def test_isin_nan_not_pypy():
+    idx = MultiIndex.from_arrays([['foo', 'bar'], [1.0, np.nan]])
+    tm.assert_numpy_array_equal(idx.isin([('bar', np.nan)]),
+                                np.array([False, False]))
+    tm.assert_numpy_array_equal(idx.isin([('bar', float('nan'))]),
+                                np.array([False, False]))
+
+
+def test_isin_level_kwarg():
+    idx = MultiIndex.from_arrays([['qux', 'baz', 'foo', 'bar'], np.arange(
+        4)])
+
+    vals_0 = ['foo', 'bar', 'quux']
+    vals_1 = [2, 3, 10]
+
+    expected = np.array([False, False, True, True])
+    tm.assert_numpy_array_equal(expected, idx.isin(vals_0, level=0))
+    tm.assert_numpy_array_equal(expected, idx.isin(vals_0, level=-2))
+
+    tm.assert_numpy_array_equal(expected, idx.isin(vals_1, level=1))
+    tm.assert_numpy_array_equal(expected, idx.isin(vals_1, level=-1))
+
+    pytest.raises(IndexError, idx.isin, vals_0, level=5)
+    pytest.raises(IndexError, idx.isin, vals_0, level=-5)
+
+    pytest.raises(KeyError, idx.isin, vals_0, level=1.0)
+    pytest.raises(KeyError, idx.isin, vals_1, level=-1.0)
+    pytest.raises(KeyError, idx.isin, vals_1, level='A')
+
+    idx.names = ['A', 'B']
+    tm.assert_numpy_array_equal(expected, idx.isin(vals_0, level='A'))
+    tm.assert_numpy_array_equal(expected, idx.isin(vals_1, level='B'))
+
+    pytest.raises(KeyError, idx.isin, vals_1, level='C')
+
+
+def test_hasnans_isnans(named_index):
+    # GH 11343, added tests for hasnans / isnans
+    for name, index in named_index.items():
+        if isinstance(index, MultiIndex):
+            pass
+        else:
+            idx = index.copy()
+
+            # cases in indices doesn't include NaN
+            expected = np.array([False] * len(idx), dtype=bool)
+            tm.assert_numpy_array_equal(idx._isnan, expected)
+            assert not idx.hasnans
+
+            idx = index.copy()
+            values = idx.values
+
+            if len(index) == 0:
+                continue
+            elif isinstance(index, DatetimeIndexOpsMixin):
+                values[1] = iNaT
+            elif isinstance(index, (Int64Index, UInt64Index)):
+                continue
+            else:
+                values[1] = np.nan
+
+            if isinstance(index, PeriodIndex):
+                idx = index.__class__(values, freq=index.freq)
+            else:
+                idx = index.__class__(values)
+
+            expected = np.array([False] * len(idx), dtype=bool)
+            expected[1] = True
+            tm.assert_numpy_array_equal(idx._isnan, expected)
+            assert idx.hasnans

pandas/tests/indexes/multi/test_conversion.py

@@ -7,20 +7,9 @@
 import pytest
 from pandas import DataFrame, MultiIndex, date_range
 from pandas.compat import PY3, range
-
 from pandas.util.testing import assert_almost_equal
 
 
-def test_tuples_with_name_string():
-    # GH 15110 and GH 14848
-
-    li = [(0, 0, 1), (0, 1, 0), (1, 0, 0)]
-    with pytest.raises(ValueError):
-        pd.Index(li, name='abc')
-    with pytest.raises(ValueError):
-        pd.Index(li, name='a')
-
-
 def test_tolist(_index):
     result = _index.tolist()
     exp = list(_index.values)
@@ -150,3 +139,12 @@ def test_roundtrip_pickle_with_tz():
          ], names=['one', 'two', 'three'])
     unpickled = tm.round_trip_pickle(index)
     assert index.equal_levels(unpickled)
+
+
+def test_pickle(indices):
+    unpickled = tm.round_trip_pickle(indices)
+    assert indices.equals(unpickled)
+    original_name, indices.name = indices.name, 'foo'
+    unpickled = tm.round_trip_pickle(indices)
+    assert indices.equals(unpickled)
+    indices.name = original_name