Ionworks Schema

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Pydantic schemas for building Ionworks pipeline configurations.

Overview

Ionworks Schema (ionworks_schema) provides the schema for constructing Ionworks pipeline configurations. Use these classes to define pipelines (data fits, calculations, entries, validations) in Python with validation, then export JSON to submit via the Ionworks API. Pipeline concepts, objectives, and workflows are described in the Pipeline documentation and in the Ionworks documentation.

Pipelines are executed by submitting configurations to the Ionworks API. Use the ionworks-api Python client to create and run jobs: pip install ionworks-api.

Installation

pip install ionworks-schema

Quick start

Build a pipeline configuration with schema classes, export to JSON, and submit with the Ionworks API client:

import ionworks_schema as iws
import json

# Define a parameter to fit (name, initial_value, bounds)
parameter = iws.Parameter(
    name="Positive electrode capacity [A.h]",
    initial_value=1.0,
    bounds=(0.5, 2.0),
)

# Objective: MSMR half-cell fit; data can be "db:<measurement_id>" for uploaded data (use objectives submodule)
objective = iws.objectives.MSMRHalfCell(
    data_input="db:your-measurement-id",
    options={"model": {"electrode": "positive"}},
)

data_fit = iws.DataFit(
    objectives={"ocp": objective},
    parameters={"Positive electrode capacity [A.h]": parameter},
)

pipeline = iws.Pipeline(elements={"fit": data_fit})

# Export to JSON for API submission.
# `to_config()` is the only supported serializer — do NOT use Pydantic's
# `model_dump()`, which is not a wire format (it drops the `type` discriminator
# and emits Python attribute names, not the wire names the API expects).
config = pipeline.to_config()
with open("pipeline_config.json", "w") as f:
    json.dump(config, f, indent=2)

# Submit via ionworks-api (requires credentials and project ID — see ionworks-api README)
# from ionworks import Ionworks
# client = Ionworks()
# job = client.pipeline.create(config)
# client.pipeline.wait_for_completion(job.id, timeout=600)

Schema classes and pipeline elements

Schema classes mirror the pipeline configuration format consumed by the Ionworks pipeline and API. Runtime behavior and options are documented in the Pipeline user guide and in the ionworkspipeline package (e.g. parsers, data_fits, objectives).

A pipeline is a top-level Pipeline with a dictionary of named elements. Each element has an element_type: entry, data_fit, calculation, or validation.

Role Schema class Description
Top-level Pipeline Pipeline configuration with named elements.
Entry DirectEntry Supply fixed parameter values (no fitting or calculation).
Data fit DataFit, ArrayDataFit Fit model parameters to data; contain objectives and parameters.
Calculation ionworks_schema.calculations Run calculations (e.g. OCP, diffusivity, geometry). See submodule for available classes.
Objectives MSMRHalfCell, MSMRFullCell, CurrentDriven, CycleAgeing, CalendarAgeing, EIS, Pulse, Resistance, ElectrodeBalancing, OCPHalfCell, and others Used inside DataFit.objectives to define what to fit. Import from ionworks_schema.objectives (e.g. iws.objectives.MSMRHalfCell).
Parameters Parameter name, initial_value, bounds (and optional prior, etc.). Used in DataFit.parameters; dict key is the parameter name.
Priors Prior Used in DataFit.priors. Import from ionworks_schema.priors (e.g. iws.priors.Prior).
Library Material, Library Built-in material library for initial parameter values.

Material library

Access built-in materials with validated parameter values for use as initial values or entries:

import ionworks_schema as iws

# List available materials
materials = iws.Library.list_materials()

# Get a specific material (e.g. NMC - Verbrugge 2017)
material = iws.Material.from_library("NMC - Verbrugge 2017")
print(material.parameter_values)

Parameter names and interpretation are described in the Pipeline documentation.

Resources

Note

This package provides configuration schemas only. To run pipelines, export JSON with pipeline.to_config() and submit it via the Ionworks API using the ionworks-api client.

to_config() is the only supported serializer. Pydantic's model_dump() is not a wire format: it omits the type discriminator and emits Python attribute names rather than the wire names the API expects (data_input rather than data), so it produces a different dict than to_config() — one the API may reject. Always build API payloads with to_config().

Project links

Key dates

PyPI data
Data sourced directly from PyPI's database.
  • Released:
Newer release available (0.24.0)

1 maintainer

PyPI data
Data sourced directly from PyPI's database.
Avatar for ionworks from gravatar.com ionworks

Credits

Author: Ionworks

Requires

Python >=3.11

Provides Extra

all dev docs

Tags

battery ionworks pipeline pydantic schema

Classifiers

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