PipelineIR¶

class lsst.pipe.base.pipelineIR.PipelineIR(loaded_yaml: dict[str, Any])¶

Bases: object

Intermediate representation of a pipeline definition

Parameters:

loaded_yamldict: A dictionary which matches the structure that would be produced by a yaml reader which parses a pipeline definition document

Raises:

ValueError

Raised if:

a pipeline is declared without a description;
no tasks are declared in a pipeline, and no pipelines are to be inherited;
more than one instrument is specified;
more than one inherited pipeline share a label.

Methods Summary

`from_string`(pipeline_string)	Create a `PipelineIR` object from a string formatted like a pipeline document
`from_uri`(uri)	Create a `PipelineIR` object from the document specified by the input uri.
`merge_pipelines`(pipelines)	Merge one or more other `PipelineIR` objects into this object.
`subset_from_labels`(labelSpecifier)	Subset a pipelineIR to contain only labels specified in labelSpecifier.
`to_primitives`()	Convert to a representation used in yaml serialization
`write_to_uri`(uri)	Serialize this `PipelineIR` object into a yaml formatted string and write the output to a file at the specified uri.

Methods Documentation

classmethod from_string(pipeline_string: str) → PipelineIR¶

Create a PipelineIR object from a string formatted like a pipeline document

Parameters:

pipeline_stringstr: A string that is formatted according like a pipeline document

classmethod from_uri(uri: str | ParseResult | ResourcePath | Path) → PipelineIR¶

Create a PipelineIR object from the document specified by the input uri.

Parameters:

uri: convertible to `~lsst.resources.ResourcePath`: Location of document to use in creating a PipelineIR object.

Returns:

pipelineIRPipelineIR: The loaded pipeline

merge_pipelines(pipelines: Iterable[PipelineIR]) → None¶

Merge one or more other PipelineIR objects into this object.

Parameters:

pipelinesIterable of PipelineIR objects: An Iterable that contains one or more PipelineIR objects to merge into this object.

Raises:

ValueError: Raised if there is a conflict in instrument specifications. Raised if a task label appears in more than one of the input PipelineIR objects which are to be merged. Raised if a labeled subset appears in more than one of the input PipelineIR objects which are to be merged, and with any subset existing in this object.

subset_from_labels(labelSpecifier: set[str]) → PipelineIR¶

Subset a pipelineIR to contain only labels specified in labelSpecifier.

Parameters:

labelSpecifierset of str: set containing labels that describes how to subset a pipeline.

Returns:

pipelinePipelineIR: A new pipelineIR object that is a subset of the old pipelineIR

Raises:

ValueError: Raised if there is an issue with specified labels

Notes

This method attempts to prune any contracts that contain labels which are not in the declared subset of labels. This pruning is done using a string based matching due to the nature of contracts and may prune more than it should. Any labeled subsets defined that no longer have all members of the subset present in the pipeline will be removed from the resulting pipeline.

to_primitives() → dict[str, Any]¶

Convert to a representation used in yaml serialization

Returns:

primitivesdict: dictionary that maps directly to the serialized YAML form.

write_to_uri(uri: str | ParseResult | ResourcePath | Path) → None¶

Serialize this PipelineIR object into a yaml formatted string and write the output to a file at the specified uri.

Parameters:

uri: convertible to `~lsst.resources.ResourcePath`: Location of document to write a PipelineIR object.

Navigation

PipelineIR¶