def test_raise_nullable_string_dtype(nullable_string_dtype):
indexer = pd.array(["a", "b"], dtype=nullable_string_dtype)
arr = np.array([1, 2, 3])
msg = "arrays used as indices must be of integer or boolean type"
with pytest.raises(IndexError, match=msg):
check_array_indexer(arr, indexer)
def __setitem__(self, key, value):
if isinstance(value, (pd.Index, pd.Series)):
value = value.to_numpy()
if isinstance(value, type(self)):
value = value.to_numpy()
key = check_array_indexer(self, key)
scalar_key = is_scalar(key)
scalar_value = is_scalar(value)
if scalar_key and not scalar_value:
raise ValueError("setting an array element with a sequence.")
# validate new items
if scalar_value:
if pd.isna(value):
value = None
elif not isinstance(value, str):
raise ValueError(
f"Cannot set non-string value '{value}' into a ArrowStringArray."
)
else:
if not is_array_like(value):
value = np.asarray(value, dtype=object)
if len(value) and not lib.is_string_array(value, skipna=True):
raise ValueError("Must provide strings.")
if self._use_arrow:
string_array = np.asarray(self._arrow_array.to_pandas())
string_array[key] = value
self._arrow_array = pa.chunked_array([pa.array(string_array)])
else:
self._ndarray[key] = value
def test_boolean_na_returns_indexer(indexer):
# https://github.com/pandas-dev/pandas/issues/31503
arr = np.array([1, 2, 3])
result = check_array_indexer(arr, indexer)
expected = np.array([True, False, False], dtype=bool)
tm.assert_numpy_array_equal(result, expected)
def _check_array_key(array, key):
"""
Checks a getitem key.
"""
key = check_array_indexer(array, key)
if isinstance(key, numbers.Integral): # To accept also numpy ints
key = int(key)
key = range(len(array))[key]
return slice(key, key + 1)
else:
return key
def __setitem__(self, key, value):
if isinstance(value, (pd.Index, pd.Series)):
value = value.to_numpy()
key = check_array_indexer(self, key)
scalar_key = is_scalar(key)
# validate new items
if scalar_key:
if pd.isna(value):
value = None
elif not is_list_like(value):
raise ValueError('Must provide list.')
array = np.asarray(self._arrow_array.to_pandas())
array[key] = value
self._arrow_array = pa.chunked_array(
[pa.array(array, type=self.dtype.arrow_type)])
def test_raise_invalid_array_dtypes(indexer):
arr = np.array([1, 2, 3])
msg = "arrays used as indices must be of integer or boolean type"
with pytest.raises(IndexError, match=msg):
check_array_indexer(arr, indexer)
def test_int_raise_missing_values(indexer):
arr = np.array([1, 2, 3])
msg = "Cannot index with an integer indexer containing NA values"
with pytest.raises(ValueError, match=msg):
check_array_indexer(arr, indexer)
def test_bool_raise_length(indexer):
arr = np.array([1, 2, 3])
msg = "Boolean index has wrong length"
with pytest.raises(IndexError, match=msg):
check_array_indexer(arr, indexer)
def test_valid_input(indexer, expected):
arr = np.array([1, 2, 3])
result = check_array_indexer(arr, indexer)
tm.assert_numpy_array_equal(result, expected)
def test_pass_through_non_array_likes(indexer):
arr = np.array([1, 2, 3])
result = check_array_indexer(arr, indexer)
assert result == indexer
def test_bool_raise_missing_values(indexer):
array = np.array([1, 2, 3])
msg = "Cannot mask with a boolean indexer containing NA values"
with pytest.raises(ValueError, match=msg):
check_array_indexer(array, indexer)