bambu-qsar 0.0.8

bambu (bioassays model builder) is CLI tool to build QSAR models based on PubChem BioAssays datasets

Bambu

Bambu (BioAssays Model Builder), is a simple tool to generate QSAR models based on PubChem BioAssays datasets. It uses mainly on RDKit and the FLAML AutoML library and provides utilitaries for downloading and preprocessing datasets, as well training and running the predictive models.

Installing

Installing as a conda package using conda:

coming soon

Installing as a PyPI package using pip:

$ pip install bambu-qsar

Note: RDKit must be installed separately.

Intalling as an environment using conda:

$ git clone 
$ cd bambu-qsar
$ conda env create --file environment.yml
$ conda activate bambu-qsar

Downloading a PubChem BioAssays data

Downloads a PubChem BioAssays data and save in a CSV file, containing the InchI representation and the label indicating molecules that were found to be active or inactive against a given target.

$ bambu-download \
    --pubchem-assay-id 29 \
    --output 29_raw.csv

The generated output contains the columns pubchem_molecule_id (Substance ID or Compound ID, depending on the option selected during download), InChI and activity. Only the fields InchI and activity are used in futher steps.

Computing descriptors or fingerprints

Computes molecule descriptors or Morgan fingerprints for a given datasets produced by bambu-download (or following the same format). The output also contains a train and test subsets, whose sizes are defined based on the --train-test-split-percent argument. The argument --resample might be used to perform a random undersampling in the dataset, as most HTS datasets are heavily umbalanced.

$ bambu-preprocess \
    --input 29_raw.csv \
    --train-test-split-percent 0.75 \
    --feature-type descriptors \
    --undersample \
    --output 29_preprocessed.csv \
    --output-preprocessor 29_descriptor_preprocessor.pickle

Train

Trains a classification model using the FLAML AutoML framework based on the bambu-preprocess output datasets. The user may adjust most of the flaml.automl.AutoML parameters using the command line arguments. CLI arguments.

$ bambu-train \
	--input-train 29_preprocess_train.csv \
	--input-test 29_preprocess_test.csv \
	--output 29_model.pickle \
	--model-history \
	--max-iter 10 \
	--time-budget 10 \
	--estimators rf extra_tree

A list of all available estimators can be accessed using the command bambu-train --list-estimators. Currently, only rf (Random Forest) and extra_tree are available.

Predict

Receives an inputs, preprocess it using a preprocess object (generated using bambu-preprocess) and then runs a classification model (generated using bambu-train). Results are saved in a CSV file.

$ bambu-predict \
	--input pubchem_compounds.sdf \
	--preprocessor 29_preprocessor.pickle \
	--model 29_model.pickle \
	--output 29_predictions.csv