molcrafts-molrs

PyPI

Python bindings for the molrs molecular modeling toolkit.

Install with pip install molcrafts-molrs and import molrs. Full docs: https://docs.molcrafts.org/molrs/.

Install

pip install molcrafts-molrs

Requires Python 3.12+.

Quick start (0.13 surface)

import numpy as np
import molrs

# SMILES → atomistic graph (class API under molrs.io)
mol = molrs.io.SmilesIR("CCO").to_atomistic()

# 3D coordinates
from molrs.conformer import Conformer

mol = Conformer().generate(mol)

# Force field: typify → pairs → potentials (no typifier.build())
from molrs.ff import MMFF94Typifier, extract_coords, intramolecular_pairs

typed = MMFF94Typifier().typify(mol)
frame = typed.to_frame()
frame["pairs"] = intramolecular_pairs(frame)
pots = MMFF94Typifier().forcefield().to_potentials(frame)
coords = extract_coords(frame)
energy, forces = pots.calc_energy_forces(coords)
assert forces.shape == (frame["atoms"].nrows, 3)

Package layout

Import Owns
molrs (top level) Core: Frame, Block, Atomistic, Box, neighbors, …
molrs.io Readers/writers, SmilesIR
molrs.ff Force fields, typifiers, potentials
molrs.compute RDF, MSD, transport, dielectric, …
molrs.conformer 3D generation
molrs.perceive Rings / aromaticity builder

Users of analysis APIs: analysis time is fs (LAMMPS real). MSD needs unwrapped coordinates. VACF is the unbiased (C(\tau)) used for Green–Kubo D and VDOS.

Development

maturin develop --release
pytest -q

Project links

Data verified by PyPI on Aug 13, 2026
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  • Released:
Newer release available (0.13.2)

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The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

BSD-3-Clause
View SPDX License List

Requires

Python >=3.12

Provides Extra

dev doc

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0.13.2

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