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Deprecate inplace #2524

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merged 10 commits into from
Nov 3, 2018
Merged

Deprecate inplace #2524

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10fc573
Start deprecating inplace.
Oct 29, 2018
edf1a0a
remove warnings from tests.
Oct 29, 2018
3a5cf5d
this commit silences nearly all warnings.
Oct 29, 2018
b1ed4df
Add whats-new.
Oct 29, 2018
484d71f
Add a default kwarg to _check_inplace and use for Dataset.update.
Oct 29, 2018
63d4175
Major fix!
Oct 29, 2018
66d3cea
Add stacklevel
Oct 30, 2018
4359403
Merge branch 'master' into deprecate/inplace
Oct 30, 2018
62faebc
Tests: Less aggressive warning filter + fix unnecessary inplace.
Oct 31, 2018
7a0d37b
revert changes to _calculate_binary_op
Nov 1, 2018
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3 changes: 3 additions & 0 deletions doc/whats-new.rst
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Expand Up @@ -58,6 +58,9 @@ Documentation
without dimension argument will change in the next release.
Now we warn a FutureWarning.
By `Keisuke Fujii <https://github.com/fujiisoup>`_.
- The ``inplace`` kwarg of a number of `DataArray` and `Dataset` methods is being
deprecated and will be removed in the next release.
By `Deepak Cherian <https://github.com/dcherian>`_.

Enhancements
~~~~~~~~~~~~
Expand Down
15 changes: 10 additions & 5 deletions xarray/core/dataarray.py
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Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,8 @@
from .options import OPTIONS
from .pycompat import OrderedDict, basestring, iteritems, range, zip
from .utils import (
decode_numpy_dict_values, either_dict_or_kwargs, ensure_us_time_resolution)
_check_inplace, decode_numpy_dict_values, either_dict_or_kwargs,
ensure_us_time_resolution)
from .variable import (
IndexVariable, Variable, as_compatible_data, as_variable,
assert_unique_multiindex_level_names)
Expand Down Expand Up @@ -546,7 +547,7 @@ def coords(self):
"""
return DataArrayCoordinates(self)

def reset_coords(self, names=None, drop=False, inplace=False):
def reset_coords(self, names=None, drop=False, inplace=None):
"""Given names of coordinates, reset them to become variables.

Parameters
Expand All @@ -565,6 +566,7 @@ def reset_coords(self, names=None, drop=False, inplace=False):
-------
Dataset, or DataArray if ``drop == True``
"""
inplace = _check_inplace(inplace)
if inplace and not drop:
raise ValueError('cannot reset coordinates in-place on a '
'DataArray without ``drop == True``')
Expand Down Expand Up @@ -1155,7 +1157,7 @@ def expand_dims(self, dim, axis=None):
ds = self._to_temp_dataset().expand_dims(dim, axis)
return self._from_temp_dataset(ds)

def set_index(self, indexes=None, append=False, inplace=False,
def set_index(self, indexes=None, append=False, inplace=None,
**indexes_kwargs):
"""Set DataArray (multi-)indexes using one or more existing
coordinates.
Expand Down Expand Up @@ -1185,14 +1187,15 @@ def set_index(self, indexes=None, append=False, inplace=False,
--------
DataArray.reset_index
"""
inplace = _check_inplace(inplace)
indexes = either_dict_or_kwargs(indexes, indexes_kwargs, 'set_index')
coords, _ = merge_indexes(indexes, self._coords, set(), append=append)
if inplace:
self._coords = coords
else:
return self._replace(coords=coords)

def reset_index(self, dims_or_levels, drop=False, inplace=False):
def reset_index(self, dims_or_levels, drop=False, inplace=None):
"""Reset the specified index(es) or multi-index level(s).

Parameters
Expand All @@ -1217,14 +1220,15 @@ def reset_index(self, dims_or_levels, drop=False, inplace=False):
--------
DataArray.set_index
"""
inplace = _check_inplace(inplace)
coords, _ = split_indexes(dims_or_levels, self._coords, set(),
self._level_coords, drop=drop)
if inplace:
self._coords = coords
else:
return self._replace(coords=coords)

def reorder_levels(self, dim_order=None, inplace=False,
def reorder_levels(self, dim_order=None, inplace=None,
**dim_order_kwargs):
"""Rearrange index levels using input order.

Expand All @@ -1247,6 +1251,7 @@ def reorder_levels(self, dim_order=None, inplace=False,
Another dataarray, with this dataarray's data but replaced
coordinates.
"""
inplace = _check_inplace(inplace)
dim_order = either_dict_or_kwargs(dim_order, dim_order_kwargs,
'reorder_levels')
replace_coords = {}
Expand Down
37 changes: 23 additions & 14 deletions xarray/core/dataset.py
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Expand Up @@ -32,9 +32,9 @@
from .pycompat import (
OrderedDict, basestring, dask_array_type, integer_types, iteritems, range)
from .utils import (
Frozen, SortedKeysDict, datetime_to_numeric, decode_numpy_dict_values,
either_dict_or_kwargs, ensure_us_time_resolution, hashable,
maybe_wrap_array)
_check_inplace, Frozen, SortedKeysDict, datetime_to_numeric,
decode_numpy_dict_values, either_dict_or_kwargs, ensure_us_time_resolution,
hashable, maybe_wrap_array)
from .variable import IndexVariable, Variable, as_variable, broadcast_variables

# list of attributes of pd.DatetimeIndex that are ndarrays of time info
Expand Down Expand Up @@ -1072,7 +1072,7 @@ def data_vars(self):
"""
return DataVariables(self)

def set_coords(self, names, inplace=False):
def set_coords(self, names, inplace=None):
"""Given names of one or more variables, set them as coordinates

Parameters
Expand All @@ -1095,14 +1095,15 @@ def set_coords(self, names, inplace=False):
# DataFrame.set_index?
# nb. check in self._variables, not self.data_vars to insure that the
# operation is idempotent
inplace = _check_inplace(inplace)
if isinstance(names, basestring):
names = [names]
self._assert_all_in_dataset(names)
obj = self if inplace else self.copy()
obj._coord_names.update(names)
return obj

def reset_coords(self, names=None, drop=False, inplace=False):
def reset_coords(self, names=None, drop=False, inplace=None):
"""Given names of coordinates, reset them to become variables

Parameters
Expand All @@ -1121,6 +1122,7 @@ def reset_coords(self, names=None, drop=False, inplace=False):
-------
Dataset
"""
inplace = _check_inplace(inplace)
if names is None:
names = self._coord_names - set(self.dims)
else:
Expand Down Expand Up @@ -2045,7 +2047,7 @@ def interp_like(self, other, method='linear', assume_sorted=False,
ds = self.reindex(object_coords)
return ds.interp(numeric_coords, method, assume_sorted, kwargs)

def rename(self, name_dict=None, inplace=False, **names):
def rename(self, name_dict=None, inplace=None, **names):
"""Returns a new object with renamed variables and dimensions.

Parameters
Expand All @@ -2070,6 +2072,7 @@ def rename(self, name_dict=None, inplace=False, **names):
Dataset.swap_dims
DataArray.rename
"""
inplace = _check_inplace(inplace)
name_dict = either_dict_or_kwargs(name_dict, names, 'rename')
for k, v in name_dict.items():
if k not in self and k not in self.dims:
Expand All @@ -2095,7 +2098,7 @@ def rename(self, name_dict=None, inplace=False, **names):
return self._replace_vars_and_dims(variables, coord_names, dims=dims,
inplace=inplace)

def swap_dims(self, dims_dict, inplace=False):
def swap_dims(self, dims_dict, inplace=None):
"""Returns a new object with swapped dimensions.

Parameters
Expand All @@ -2119,6 +2122,7 @@ def swap_dims(self, dims_dict, inplace=False):
Dataset.rename
DataArray.swap_dims
"""
inplace = _check_inplace(inplace)
for k, v in dims_dict.items():
if k not in self.dims:
raise ValueError('cannot swap from dimension %r because it is '
Expand Down Expand Up @@ -2231,7 +2235,7 @@ def expand_dims(self, dim, axis=None):

return self._replace_vars_and_dims(variables, self._coord_names)

def set_index(self, indexes=None, append=False, inplace=False,
def set_index(self, indexes=None, append=False, inplace=None,
**indexes_kwargs):
"""Set Dataset (multi-)indexes using one or more existing coordinates or
variables.
Expand Down Expand Up @@ -2262,14 +2266,15 @@ def set_index(self, indexes=None, append=False, inplace=False,
Dataset.reset_index
Dataset.swap_dims
"""
inplace = _check_inplace(inplace)
indexes = either_dict_or_kwargs(indexes, indexes_kwargs, 'set_index')
variables, coord_names = merge_indexes(indexes, self._variables,
self._coord_names,
append=append)
return self._replace_vars_and_dims(variables, coord_names=coord_names,
inplace=inplace)

def reset_index(self, dims_or_levels, drop=False, inplace=False):
def reset_index(self, dims_or_levels, drop=False, inplace=None):
"""Reset the specified index(es) or multi-index level(s).

Parameters
Expand All @@ -2293,13 +2298,14 @@ def reset_index(self, dims_or_levels, drop=False, inplace=False):
--------
Dataset.set_index
"""
inplace = _check_inplace(inplace)
variables, coord_names = split_indexes(dims_or_levels, self._variables,
self._coord_names,
self._level_coords, drop=drop)
return self._replace_vars_and_dims(variables, coord_names=coord_names,
inplace=inplace)

def reorder_levels(self, dim_order=None, inplace=False,
def reorder_levels(self, dim_order=None, inplace=None,
**dim_order_kwargs):
"""Rearrange index levels using input order.

Expand All @@ -2322,6 +2328,7 @@ def reorder_levels(self, dim_order=None, inplace=False,
Another dataset, with this dataset's data but replaced
coordinates.
"""
inplace = _check_inplace(inplace)
dim_order = either_dict_or_kwargs(dim_order, dim_order_kwargs,
'reorder_levels')
replace_variables = {}
Expand Down Expand Up @@ -2472,7 +2479,7 @@ def unstack(self, dim=None):
result = result._unstack_once(dim)
return result

def update(self, other, inplace=True):
def update(self, other, inplace=None):
"""Update this dataset's variables with those from another dataset.

Parameters
Expand All @@ -2494,12 +2501,13 @@ def update(self, other, inplace=True):
If any dimensions would have inconsistent sizes in the updated
dataset.
"""
inplace = _check_inplace(inplace, default=True)
variables, coord_names, dims = dataset_update_method(self, other)

return self._replace_vars_and_dims(variables, coord_names, dims,
inplace=inplace)

def merge(self, other, inplace=False, overwrite_vars=frozenset(),
def merge(self, other, inplace=None, overwrite_vars=frozenset(),
compat='no_conflicts', join='outer'):
"""Merge the arrays of two datasets into a single dataset.

Expand Down Expand Up @@ -2550,6 +2558,7 @@ def merge(self, other, inplace=False, overwrite_vars=frozenset(),
MergeError
If any variables conflict (see ``compat``).
"""
inplace = _check_inplace(inplace)
variables, coord_names, dims = dataset_merge_method(
self, other, overwrite_vars=overwrite_vars, compat=compat,
join=join)
Expand Down Expand Up @@ -3311,8 +3320,8 @@ def func(self, other):
return func

def _calculate_binary_op(self, f, other, join='inner',
inplace=False):

inplace=None):
inplace = _check_inplace(inplace)
def apply_over_both(lhs_data_vars, rhs_data_vars, lhs_vars, rhs_vars):
if inplace and set(lhs_data_vars) != set(rhs_data_vars):
raise ValueError('datasets must have the same data variables '
Expand Down
10 changes: 10 additions & 0 deletions xarray/core/utils.py
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Expand Up @@ -18,6 +18,16 @@
OrderedDict, basestring, bytes_type, dask_array_type, iteritems)


def _check_inplace(inplace, default=False):
if inplace is None:
inplace = default
else:
warnings.warn('The inplace argument has been deprecated and will be '
'removed in xarray 0.12.0.', FutureWarning)
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Can you add the stacklevel argument with an appropriate value? (you'll need to experiment a bit)

That ensures that warnings end up pointing to the specific line of code that need to be updated.

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stacklevel=3 seems to give useful warnings with the test suite

xarray/tests/test_dataset.py::TestDataset::()::test_expand_dims_error
  /home/deepak/work/python/xarray/xarray/tests/test_dataset.py:2016: FutureWarning: The inplace argument has been deprecated and will be removed in xarray 0.12.0.
    original.set_coords('z', inplace=True)


return inplace


def alias_message(old_name, new_name):
return '%s has been deprecated. Use %s instead.' % (old_name, new_name)

Expand Down
1 change: 1 addition & 0 deletions xarray/tests/test_dataarray.py
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Expand Up @@ -23,6 +23,7 @@
requires_scipy, source_ndarray)


@pytest.mark.filterwarnings('ignore:The inplace argument')
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Can we try fixing these tests now instead? Otherwise we may be stuck with large clean-up later.

For testing deprecations, I find it often helps to convert warnings into an error, e.g., by adding raise Exception on the line after issuing the warning.

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I thought we might want to keep those tests around while people are still using that code path.

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I forgot the main reason for doing this: to make sure that xarray doesn't rely upon the deprecated behavior internally.

But if you already checked that, then I suppose this is fine.

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Oh I haven't checked that closely but I can do that tonight.
(my impression was that the tests were testing inplace behaviour, but I see that could be wrong)

class TestDataArray(object):
@pytest.fixture(autouse=True)
def setup(self):
Expand Down
1 change: 1 addition & 0 deletions xarray/tests/test_dataset.py
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Expand Up @@ -86,6 +86,7 @@ def lazy_inaccessible(k, v):
k, v in iteritems(self._variables))


@pytest.mark.filterwarnings('ignore:The inplace argument')
class TestDataset(object):
def test_repr(self):
data = create_test_data(seed=123)
Expand Down
2 changes: 1 addition & 1 deletion xarray/tests/test_plot.py
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Expand Up @@ -797,7 +797,7 @@ def setUp(self):
x, y = np.meshgrid(da.x.values, da.y.values)
ds['x2d'] = DataArray(x, dims=['y', 'x'])
ds['y2d'] = DataArray(y, dims=['y', 'x'])
ds.set_coords(['x2d', 'y2d'], inplace=True)
ds = ds.set_coords(['x2d', 'y2d'])
# set darray and plot method
self.darray = ds.testvar

Expand Down