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Record W4417528400 · doi:10.21105/joss.08858

PyMilo: A Python Library for ML I/O

2025· article· W4417528400 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueThe Journal of Open Source Software · 2025
Typearticle
Language
FieldComputer Science
TopicComputational Physics and Python Applications
Canadian institutionsUniversity of Toronto
Fundersnot available
KeywordsPython (programming language)ExecutableWorkflowReuseFidelityScripting language

Abstract

fetched live from OpenAlex

PyMilo is an open-source Python package that addresses the limitations of existing machine learning (ML) model storage formats by providing a transparent, reliable, end-to-end, and safe method for exporting and deploying trained models.Current tools rely on black-box or executable formats that obscure internal model structures, making them difficult to audit, verify, or safely share.Meanwhile, tensor-centric formats such as Safetensors (Hugging Face, 2025) securely store and transfer numerical tensors but do not capture the internal and structural composition of classical machine-learning models (e.g., scikit-learn pipelines), which remain PyMilo's primary focus.Others apply structural transformations during export that may degrade predictive performance and reduce the model to a limited inference-only interface.In contrast, PyMilo serializes models in a transparent human-readable format that preserves end-to-end model fidelity and enables reliable, safe, and interpretable exchange.Here, transparent refers to the ability to inspect model internals through a human-readable structure without execution, and end-to-end fidelity denotes that a model exported and re-imported with PyMilo retains the exact same signature, functionality, parameters, and internal structure as the original, ensuring complete behavioral and structural equivalence.This package is designed to make the preservation and reuse of trained ML models safer, more interpretable, and easier to manage across different stages of the ML workflow (Figure 1).

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesScholarly communication, Open science
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Not applicable · Consensus signal: none
GenreCandidate signal: Methods · Consensus signal: none
Teacher disagreement score0.633
Threshold uncertainty score0.999

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.001
Science and technology studies0.0010.000
Scholarly communication0.0020.001
Open science0.0060.002
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.025
GPT teacher head0.309
Teacher spread0.284 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it