from typing import List, Union
from . import _dispatch
from ._classes import Labels, TensorBlock, TensorMap, torch_jit_is_scripting
def _sort_single_block(
block: TensorBlock,
axes: List[str],
descending: bool,
) -> TensorBlock:
"""
Sorts a single TensorBlock without the user input checking and sorting of gradients
"""
sample_names = block.samples.names
sample_values = block.samples.values
component_names: List[List[str]] = []
components_values = []
for component in block.components:
component_names.append(component.names)
components_values.append(component.values)
property_names = block.properties.names
properties_values = block.properties.values
values = block.values
if "samples" in axes:
sorted_idx = _dispatch.argsort_labels_values(sample_values, reverse=descending)
sample_values = sample_values[sorted_idx]
values = values[sorted_idx]
if "components" in axes:
for i, _ in enumerate(block.components):
sorted_idx = _dispatch.argsort_labels_values(
components_values[i], reverse=descending
)
components_values[i] = components_values[i][sorted_idx]
values = _dispatch.take(values, sorted_idx, axis=i + 1)
if "properties" in axes:
sorted_idx = _dispatch.argsort_labels_values(
properties_values, reverse=descending
)
properties_values = properties_values[sorted_idx]
values = _dispatch.take(values, sorted_idx, axis=-1)
samples_labels = Labels(names=sample_names, values=sample_values)
properties_labels = Labels(names=property_names, values=properties_values)
components_labels = [
Labels(names=component_names[i], values=components_values[i])
for i in range(len(component_names))
]
return TensorBlock(
values=values,
samples=samples_labels,
components=components_labels,
properties=properties_labels,
)
[docs]
def sort_block(
block: TensorBlock,
axes: Union[str, List[str]] = "all",
descending: bool = False,
) -> TensorBlock:
"""
Rearrange the values of a block according to the order given by the sorted metadata
of the given axes.
This function creates copies of the metadata on the CPU to sort the metadata.
:param axes: axes to sort. The labels entries along these axes will be sorted in
lexicographic order, and the arrays values will be reordered accordingly.
Possible values are ``'samples'``, ``'components'``, ``'properties'`` and
``'all'`` to sort everything.
:param descending: if false, the order is ascending
:return: sorted tensor block
>>> import numpy as np
>>> import metatensor
>>> from metatensor import TensorBlock, TensorMap, Labels
>>> block = TensorBlock(
... values=np.arange(9).reshape(3, 3),
... samples=Labels(
... ["structures", "centers"], np.array([[0, 3], [0, 1], [0, 2]])
... ),
... components=[],
... properties=Labels(["n", "l"], np.array([[2, 0], [3, 0], [1, 0]])),
... )
>>> print(block)
TensorBlock
samples (3): ['structures', 'centers']
components (): []
properties (3): ['n', 'l']
gradients: None
>>> # sorting axes one by one
>>> block_sorted_stepwise = metatensor.sort_block(block, axes=["properties"])
>>> # properties (last dimension of the array) are sorted
>>> block_sorted_stepwise.values
array([[2, 0, 1],
[5, 3, 4],
[8, 6, 7]])
>>> block_sorted_stepwise = metatensor.sort_block(
... block_sorted_stepwise, axes=["samples"]
... )
>>> # samples (first dimension of the array) are sorted
>>> block_sorted_stepwise.values
array([[5, 3, 4],
[8, 6, 7],
[2, 0, 1]])
>>> # sorting both samples and properties at the same time
>>> sorted_block = metatensor.sort_block(block)
>>> np.all(sorted_block.values == block_sorted_stepwise.values)
True
>>> # This function can also sort gradients:
>>> sorted_block.add_gradient(
... parameter="g",
... gradient=TensorBlock(
... values=np.arange(18).reshape(3, 2, 3),
... samples=Labels(["sample"], np.array([[1], [2], [0]])),
... components=[Labels.range("direction", 2)],
... properties=sorted_block.properties,
... ),
... )
>>> sorted_grad_block = metatensor.sort_block(sorted_block)
>>> sorted_grad_block.gradient("g").samples == Labels.range("sample", 3)
True
>>> sorted_grad_block.gradient("g").properties == sorted_block.properties
True
>>> # the components (middle dimensions) are also sorted:
>>> sorted_grad_block.gradient("g").values
array([[[12, 13, 14],
[15, 16, 17]],
<BLANKLINE>
[[ 0, 1, 2],
[ 3, 4, 5]],
<BLANKLINE>
[[ 6, 7, 8],
[ 9, 10, 11]]])
"""
if isinstance(axes, str):
if axes == "all":
axes_list = ["samples", "components", "properties"]
else:
axes_list = [axes]
elif isinstance(axes, list):
axes_list = axes
else:
if torch_jit_is_scripting():
extra = ""
else:
extra = f", not {type(axes)}"
raise TypeError("'axes' should be a string or list of strings" + extra)
for axis in axes_list:
if axis not in ["samples", "components", "properties"]:
raise ValueError(
"`axes` must be one of 'samples', 'components' or 'properties', "
f"not '{axis}'"
)
result_block = _sort_single_block(block, axes_list, descending)
for parameter, gradient in block.gradients():
if len(gradient.gradients_list()) != 0:
raise NotImplementedError("gradients of gradients are not supported")
result_block.add_gradient(
parameter=parameter,
gradient=_sort_single_block(gradient, axes_list, descending),
)
return result_block
[docs]
def sort(
tensor: TensorMap,
axes: Union[str, List[str]] = "all",
descending: bool = False,
) -> TensorMap:
"""
Sort the ``tensor`` according to the key values and the blocks for each specified
axis in ``axes`` according to the label values along these axes.
Each block is sorted separately, see :py:func:`sort_block` for more information
Note: This function duplicates metadata on the CPU for the purpose of sorting.
:param axes: axes to sort. The labels entries along these axes will be sorted in
lexicographic order, and the arrays values will be reordered accordingly.
Possible values are ``'keys'``, ``'samples'``, ``'components'``,
``'properties'`` and ``'all'`` to sort everything.
:param descending: if false, the order is ascending
:return: sorted tensor map
>>> import numpy as np
>>> import metatensor
>>> from metatensor import TensorBlock, TensorMap, Labels
>>> block_1 = TensorBlock(
... values=np.arange(9).reshape(3, 3),
... samples=Labels(
... ["structures", "centers"], np.array([[0, 3], [0, 1], [0, 2]])
... ),
... components=[],
... properties=Labels(["n", "l"], np.array([[1, 0], [2, 0], [0, 0]])),
... )
>>> block_2 = TensorBlock(
... values=np.arange(3).reshape(1, 3),
... samples=Labels(["structures", "centers"], np.array([[0, 0]])),
... components=[],
... properties=Labels(["n", "l"], np.array([[1, 0], [2, 0], [0, 0]])),
... )
>>> tm = TensorMap(
... keys=Labels(["species"], np.array([[1], [0]])), blocks=[block_2, block_1]
... )
>>> metatensor.sort(tm, axes="keys")
TensorMap with 2 blocks
keys: species
0
1
"""
if isinstance(axes, str):
axes_list: List[str] = []
if axes == "all":
axes_list = ["samples", "components", "properties"]
sort_keys = True
elif axes == "keys":
axes_list = []
sort_keys = True
else:
axes_list = [axes]
sort_keys = False
elif isinstance(axes, list):
axes_list = axes
if "keys" in axes_list:
keys_index = axes_list.index("keys")
sort_keys = True
axes_list.pop(keys_index)
else:
sort_keys = False
else:
if torch_jit_is_scripting():
extra = ""
else:
extra = f", not {type(axes)}"
raise TypeError("'axes' should be a string or list of strings" + extra)
# Do we need to sort the keys?
if sort_keys:
sorted_idx = _dispatch.argsort_labels_values(
tensor.keys.values, reverse=descending
)
new_keys = Labels(
names=tensor.keys.names,
values=tensor.keys.values[sorted_idx],
)
else:
new_keys = tensor.keys
sorted_idx = _dispatch.int_array_like(
int_list=list(range(len(new_keys))),
like=new_keys.values,
)
# Do any required sorting on the blocks
new_blocks: List[TensorBlock] = []
for i in sorted_idx:
new_blocks.append(
sort_block(
block=tensor.block(tensor.keys[int(i)]),
axes=axes_list,
descending=descending,
)
)
return TensorMap(new_keys, new_blocks)