aimsim-core
Core AIMSim molecular featurization and comparison utilities.
Decision gist · record as of 2026-08-14
Yes, if you need programmatic molecular featurization and similarity scoring in Python. The core module offers low-friction installation and stable, permissive licensing. However, maintenance is aging—the project is no longer actively developed—so evaluate whether you need ongoing support or can work with a stable snapshot. No known security vulnerabilities.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.8 or later.
- RDKit and other cheminformatics dependencies may require system libraries for compilation.
- Low friction installation with a pure-Python wheel.
License · maintenance · safety
MIT (permissive) — MIT license is permissive, allowing use in commercial and proprietary projects with minimal restrictions.
last release 2025-09-09 (339 days) · last repo commit 2025-09-09 · 44 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 85,046 downloads/mo, #13,958 on PyPI
Alternatives
Verify before relying
pip install aimsim-core
from aimsim_core import Molecule
mol = Molecule(smiles='CCO')
fingerprint = mol.get_fingerprint('morgan')- Whether the core module API is stable and documented for programmatic use outside the GUI
- Performance characteristics when processing large molecular datasets
- Whether all 44 similarity metrics are accessible via the core module or only through the CLI
What it is and what it does
AIMSim-core is the backend library for molecular diversity visualization and analysis. It provides fingerprinting, descriptor calculation, and similarity scoring for chemical structures—the computational engine behind the full AIMSim package without the graphical interface. The package wraps multiple cheminformatics tools (RDKit, PaDELPy, MHFP, Mordred) into a unified API for comparing molecular structures.
The library is designed for chemists and computational researchers who need to assess chemical diversity in datasets, find structurally similar molecules, or build training sets for machine learning. It supports Morgan fingerprints, RDKit topological and Daylight fingerprints, and can interface with additional descriptor libraries. The project is stable but no longer actively developed, with maintenance provided on an as-needed basis.
Use it for
- Exploratory synthesis: check if newly proposed molecules are too similar to already-synthesized ones to avoid redundant synthesis effort.
- Virtual screening: find structurally similar molecules in a database to an active compound for lead optimization or drug discovery.
- Machine learning dataset assessment: evaluate training set diversity to ensure robust model generalization and identify clusters requiring separate models.
- Substrate scope verification: assess structural and chemical similarity across reaction substrates to ensure functional group tolerance coverage.
- Descriptor-based analysis: calculate molecular fingerprints and descriptors for downstream cheminformatics workflows without visualization overhead.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need programmatic molecular featurization and similarity scoring in Python.
The core module offers low-friction installation and stable, permissive licensing. However, maintenance is aging—the project is no longer actively developed—so evaluate whether you need ongoing support or can work with a stable snapshot. No known security vulnerabilities.
Install
aimsim-core on PyPI
Before you install
Low friction installation with a pure-Python wheel. Maintenance is aging—the project reached stable state but is no longer actively developed, with support provided as time allows. Nine runtime dependencies including scikit-learn, rdkit, and pandas are well-established libraries.
Requires Python 3.8 or later. RDKit and other cheminformatics dependencies may require system libraries for compilation.
License in practice
MIT license is permissive, allowing use in commercial and proprietary projects with minimal restrictions.
Quickstart
pip install aimsim-core
from aimsim_core import Molecule
mol = Molecule(smiles='CCO')
fingerprint = mol.get_fingerprint('morgan')Verify before relying
- Whether the core module API is stable and documented for programmatic use outside the GUI
- Performance characteristics when processing large molecular datasets
- Whether all 44 similarity metrics are accessible via the core module or only through the CLI
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.8 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 9 packagespsutilscikit_learnrdkitnumpypandaspadelpymhfpmordredcommunitymultiprocess |
| Maintenance | Aging 339 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 85,046 / month, #13,958 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Programming Language :: Python :: 3 |
Evidence: aimsim_core-2.2.3-py3-none-any.whl
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