eolearn.core.core_tasks

A collection of most basic EOTasks

class eolearn.core.core_tasks.CopyTask(features=Ellipsis)[source]

Bases: EOTask

Makes a shallow copy of the given EOPatch.

It copies feature type dictionaries but not the data itself.

Parameters:: features (FeaturesSpecification) – A collection of features or feature types that will be copied into a new EOPatch.

execute(eopatch)[source]

Override to specify action performed by task.

Parameters:: eopatch (EOPatch) –
Return type:: EOPatch

class eolearn.core.core_tasks.DeepCopyTask(features=Ellipsis)[source]

Bases: CopyTask

Makes a deep copy of the given EOPatch.

Parameters:

features – A collection of features or feature types that will be copied into a new EOPatch.
args (Any) –
kwargs (Any) –

Return type:

Self

execute(eopatch)[source]

Override to specify action performed by task.

Parameters:: eopatch (EOPatch) –
Return type:: EOPatch

class eolearn.core.core_tasks.IOTask(path, filesystem=None, create=False, config=None)[source]

Bases: EOTask

An abstract Input/Output task that can handle a path and a filesystem object.

Parameters:

path (str) – root path where all EOPatches are saved
filesystem (FS | None) – An existing filesystem object. If not given it will be initialized according to the EOPatch path.
create (bool) – If the filesystem path doesn’t exist this flag indicates to either create it or raise an error
config (SHConfig | None) – A configuration object with AWS credentials. By default, is set to None and in this case the default configuration will be taken.

property filesystem: FS: A filesystem property that unpickles an existing filesystem definition or creates a new one.

class eolearn.core.core_tasks.SaveTask(path, filesystem=None, config=None, **kwargs)[source]

Bases: IOTask

Saves the given EOPatch to a filesystem.

Parameters:

path (str) – root path where all EOPatches are saved
filesystem (FS | None) – An existing filesystem object. If not given it will be initialized according to the EOPatch path.
features – A collection of features types specifying features of which type will be saved. By default, all features will be saved.
overwrite_permission – A level of permission for overwriting an existing EOPatch
compress_level – A level of data compression and can be specified with an integer from 0 (no compression) to 9 (highest compression).
config (SHConfig | None) – A configuration object with AWS credentials. By default, is set to None and in this case the default configuration will be taken.
kwargs (Any) –

execute(eopatch, *, eopatch_folder='')[source]

Saves the EOPatch to disk: folder/eopatch_folder.

Parameters:

eopatch (EOPatch) – EOPatch which will be saved
eopatch_folder (str) – Name of EOPatch folder containing data.

Returns:

The same EOPatch

Return type:

EOPatch

class eolearn.core.core_tasks.LoadTask(path, filesystem=None, config=None, **kwargs)[source]

Bases: IOTask

Loads an EOPatch from a filesystem.

Parameters:

path (str) – root directory where all EOPatches are saved
filesystem (FS | None) – An existing filesystem object. If not given it will be initialized according to the EOPatch path. If you intend to run this task in multiprocessing mode you shouldn’t specify this parameter.
features – A collection of features to be loaded. By default, all features will be loaded.
lazy_loading – If True features will be lazy loaded. Default is False
config (SHConfig | None) – A configuration object with AWS credentials. By default, is set to None and in this case the default configuration will be taken.
kwargs (Any) –

execute(eopatch=None, *, eopatch_folder='')[source]

Loads the EOPatch from disk: folder/eopatch_folder.

Parameters:

eopatch (EOPatch | None) – Optional input EOPatch. If given the loaded features are merged onto it, otherwise a new EOPatch is created.
eopatch_folder (str) – Name of EOPatch folder containing data.

Returns:

EOPatch loaded from disk

Return type:

EOPatch

class eolearn.core.core_tasks.AddFeatureTask(feature)[source]

Bases: EOTask

Adds a feature to the given EOPatch.

Parameters:: feature (FeatureSpec) – Feature to be added

execute(eopatch, data)[source]

Returns the EOPatch with added features.

Parameters:

eopatch (EOPatch) – input EOPatch
data (object) – data to be added to the feature

Returns:

input EOPatch with the specified feature

Return type:

EOPatch

class eolearn.core.core_tasks.RemoveFeatureTask(features)[source]

Bases: EOTask

Removes one or multiple features from the given EOPatch.

Parameters:: features (FeaturesSpecification) – A collection of features to be removed.

execute(eopatch)[source]

Returns the EOPatch with removed features.

Parameters:: eopatch (EOPatch) – input EOPatch
Returns:: input EOPatch without the specified feature
Return type:: EOPatch

class eolearn.core.core_tasks.RenameFeatureTask(features)[source]

Bases: EOTask

Renames one or multiple features from the given EOPatch.

Parameters:: features (FeaturesSpecification) – A collection of features to be renamed.

execute(eopatch)[source]

Returns the EOPatch with renamed features.

Parameters:: eopatch (EOPatch) – input EOPatch
Returns:: input EOPatch with the renamed features
Return type:: EOPatch

class eolearn.core.core_tasks.DuplicateFeatureTask(features, deep_copy=False)[source]

Bases: EOTask

Duplicates one or multiple features in an EOPatch.

Parameters:

features (FeaturesSpecification) – A collection of features to be copied.
deep_copy (bool) – Make a deep copy of feature’s data if set to true, else just assign it.

execute(eopatch)[source]

Returns the EOPatch with copied features.

Parameters:: eopatch (EOPatch) – Input EOPatch
Returns:: Input EOPatch with the duplicated features.
Raises:: ValueError – Raises an exception when trying to duplicate a feature with an already existing feature name.
Return type:: EOPatch

class eolearn.core.core_tasks.InitializeFeatureTask(features, shape, init_value=0, dtype=<class 'numpy.uint8'>)[source]

Bases: EOTask

Initializes the values of a feature.

Example:

InitializeFeature((FeatureType.DATA, 'data1'), shape=(5, 10, 10, 3), init_value=3)

# Initialize data of the same shape as (FeatureType.DATA, 'data1')
InitializeFeature((FeatureType.MASK, 'mask1'), shape=(FeatureType.DATA, 'data1'), init_value=1)

Parameters:

features (FeaturesSpecification) – A collection of features to initialize.
shape (tuple[int, ...] | FeatureSpec) – A shape object (t, n, m, d) or a feature from which to read the shape.
init_value (int) – A value with which to initialize the array of the new feature.
dtype (np.dtype | type) – Type of array values.

Raises:

ValueError – Raises an exception when passing the wrong shape argument.

execute(eopatch)[source]

Parameters:: eopatch (EOPatch) – Input EOPatch.
Returns:: Input EOPatch with the initialized additional features.
Return type:: EOPatch

class eolearn.core.core_tasks.MoveFeatureTask(features, deep_copy=False)[source]

Bases: EOTask

Task to copy/deepcopy fields from one EOPatch to another.

Parameters:

features (FeaturesSpecification) – A collection of features to be moved.
deep_copy (bool) – Make a deep copy of feature’s data if set to true, else just assign it.

execute(src_eopatch, dst_eopatch)[source]

Parameters:

src_eopatch (EOPatch) – Source EOPatch from which to take features.
dst_eopatch (EOPatch) – Destination EOPatch to which to move/copy features.

Returns:

dst_eopatch with the additional features from src_eopatch.

Return type:

EOPatch

class eolearn.core.core_tasks.MapFeatureTask(input_features, output_features, map_function=None, **kwargs)[source]

Bases: EOTask

Applies a function to each feature in input_features of a patch and stores the results in a set of output_features.

Example using inheritance:

class MultiplyFeatures(MapFeatureTask):
    def map_method(self, f):
        return f * 2

multiply = MultiplyFeatures({FeatureType.DATA: ['f1', 'f2', 'f3']},  # input features
                            {FeatureType.MASK: ['m1', 'm2', 'm3']})  # output features

result = multiply(patch)

Example using lambda:

multiply = MapFeatureTask({FeatureType.DATA: ['f1', 'f2', 'f3']},  # input features
                          {FeatureType.MASK: ['m1', 'm2', 'm3']},  # output features
                          lambda f: f*2)                           # a function to apply to each feature

result = multiply(patch)

Example using a np.max and it’s kwargs passed as arguments to the MapFeatureTask:

maximum = MapFeatureTask((FeatureType.DATA: 'f1'),  # input features
                         (FeatureType.MASK, 'm1'),  # output feature
                         np.max,                    # a function to apply to each feature
                         axis=0)                    # function's kwargs

result = maximum(patch)

Parameters:

input_features (FeaturesSpecification) – A collection of the input features to be mapped.
output_features (FeaturesSpecification) – A collection of the output features to which to assign the output data.
map_function (Callable | None) – A function or lambda to be applied to the input data.
kwargs (Any) – kwargs to be passed to the map function.

Raises:

ValueError – Raises an exception when passing feature collections with different lengths.

execute(eopatch)[source]

Parameters:: eopatch (EOPatch) – Source EOPatch from which to read the data of input features.
Returns:: An eopatch with the additional mapped features.
Return type:: EOPatch

map_method(feature)[source]

A function that will be applied to the input features.

Parameters:: feature (Any) –
Return type:: Any

class eolearn.core.core_tasks.ZipFeatureTask(input_features, output_feature, zip_function=None, **kwargs)[source]

Bases: EOTask

Passes a set of input_features to a function, which returns a single features as a result and stores it in the given EOPatch.

Example using inheritance:

class CalculateFeatures(ZipFeatureTask):
    def zip_method(self, *f):
        return f[0] / (f[1] + f[2])

calc = CalculateFeatures({FeatureType.DATA: ['f1', 'f2', 'f3']}, # input features
                         (FeatureType.MASK, 'm1'))               # output feature

result = calc(patch)

Example using lambda:

calc = ZipFeatureTask({FeatureType.DATA: ['f1', 'f2', 'f3']},  # input features
                      (FeatureType.MASK, 'm1'),                # output feature
                      lambda f0, f1, f2: f0 / (f1 + f2))       # a function to apply to each feature

result = calc(patch)

Example using a np.maximum and it’s kwargs passed as arguments to the ZipFeatureTask:

maximum = ZipFeatureTask({FeatureType.DATA: ['f1', 'f2']},  # input features
                         (FeatureType.MASK, 'm1'),          # output feature
                         np.maximum,                        # a function to apply to each feature
                         dtype=np.float64)                  # function's kwargs

result = maximum(patch)

Parameters:

input_features (FeaturesSpecification) – A collection of the input features to be mapped.
output_feature (SingleFeatureSpec) – An output feature object to which to assign the data.
zip_function (Callable | None) – A function or lambda to be applied to the input data.
kwargs (Any) – kwargs to be passed to the zip function.

execute(eopatch)[source]

Parameters:: eopatch (EOPatch) – Source EOPatch from which to read the data of input features.
Returns:: An eopatch with the additional zipped features.
Return type:: EOPatch

zip_method(*features)[source]

A function that will be applied to the input features if overridden.

Parameters:: features (Any) –
Return type:: Any

class eolearn.core.core_tasks.MergeFeatureTask(input_features, output_feature, zip_function=None, **kwargs)[source]

Bases: ZipFeatureTask

Merges multiple features together by concatenating their data along the specified axis.

Parameters:

input_features – A collection of the input features to be mapped.
output_feature – An output feature object to which to assign the data.
zip_function – A function or lambda to be applied to the input data.
kwargs (Any) – kwargs to be passed to the zip function.
args (Any) –

Return type:

Self

zip_method(*f, dtype=None, axis=-1)[source]

Concatenates the data of features along the specified axis.

Parameters:

f (ndarray) –
dtype (None | dtype | type) –
axis (int) –

Return type:

ndarray

class eolearn.core.core_tasks.ExtractBandsTask(input_feature, output_feature, bands)[source]

Bases: MapFeatureTask

Moves a subset of bands from one feature to a new one.

Parameters:

input_feature (FeaturesSpecification) – A source feature from which to take the subset of bands.
output_feature (FeaturesSpecification) – An output feature to which to write the bands.
bands (list[int]) – A list of bands to be moved.

map_method(feature)[source]

A function that will be applied to the input features.

Parameters:: feature (ndarray) –
Return type:: ndarray

class eolearn.core.core_tasks.ExplodeBandsTask(input_feature, output_mapping)[source]

Bases: EOTask

Explode a subset of bands from one feature to multiple new features.

Parameters:

input_feature (tuple[FeatureType, str]) – A source feature from which to take the subset of bands.
output_mapping (dict[tuple[FeatureType, str], int | Iterable[int]]) – A mapping of output features into the band indices used to explode the input feature.

execute(eopatch)[source]

Override to specify action performed by task.

Parameters:: eopatch (EOPatch) –
Return type:: EOPatch

class eolearn.core.core_tasks.CreateEOPatchTask(*args, **kwargs)[source]

Bases: EOTask

Creates an EOPatch.

Stores initialization parameters and the order to the instance attribute init_args.

Parameters:

args (Any) –
kwargs (Any) –

Return type:

Self

execute(**kwargs)[source]

Returns a newly created EOPatch with the given kwargs.

Parameters:: kwargs (Any) – Any valid kwargs accepted by EOPatch.__init__
Returns:: A new eopatch.
Return type:: EOPatch

class eolearn.core.core_tasks.MergeEOPatchesTask(**merge_kwargs)[source]

Bases: EOTask

Merge content from multiple EOPatches into a single EOPatch.

Check merge_eopatches for more information.

Parameters:: merge_kwargs (Any) – Keyword arguments defined for merge_eopatches function.

execute(*eopatches)[source]

Parameters:: eopatches (EOPatch) – EOPatches to be merged
Returns:: A new EOPatch with merged content
Return type:: EOPatch