chembfn-webui 2.2.1

Web-based UI visualisation tool for ChemBFN method

Important:

For the security concerning, it is not recommended to use this application as a public service. When deploying on a local host as a shared application, it is better to install this application in a container or VM, to prevent this application from accessing the Internet, and to limit the premissions of read, create, and delete loacal files and directories.

1. Install

$ pip install -U chembfn_webui

2. Place model files

• Place customised vocabulary files (plain text .txt format) under chembfn_webui/model/vocab.
• Place base model files (pretrained model in .pt format) under chembfn_webui/model/base_model.
• Group standalone model files (model.pt, optional mlp.pt) and configuration file (config.json) in one folder for each model and place these folders under chembfn_webui/model/standalone_model.
• Group LoRA model files (lora.pt, optional mlp.pt) and configuration file (config.json) in one folder for each model and place these folders under chembfn_webui/model/lora.

For example,

├───chembfn_webui
    ├───bin
    ├───cache
    ├───lib
    └───model
        ├───base_model
        |   └───zinc15_190m.pt
        ├───lora
        │   └───csd_ees
        │       ├───lora.pt
        |       ├───mlp.pt
        |       └───config.json
        ├───standalone_model
        │   ├───guacamol
        │   |   ├───model.pt
        │   |   └───config.json
        │   └───qm9
        |        ├───model.pt
        |        ├───mlp.pt
        |        └───config.json
        └───vocab
            └───moses_selfies_vocab.txt

Note:

The file config.json is automatically saved by CLI tool Madmol provided in bayesianflow-for-chem package. If you train models via Python API, you need to manually create that file for your models by filling in the tempate:

{
   "padding_index": 0,
   "start_index": 1,
   "end_index": 2,
   "padding_strategy": "static",
   "padding_length": PADDING_LENGTH,
   "label": [LABEL_NAME_I, LABEL_NAME_II, ...],
   "name": JOB_NAME
}

The configureation file for base models can be downloaded here.

If placed correctly, all these files can be seen in the "model explorer" tab.

You can use an external folder to host the models if it follows the same structure as chembfn_webui/model. See the next section for the method.

3. Launch the program

I. launch the web-UI

$ chembfn

II. launch the web in a public link

$ chembfn --public

III. use an external directory to hold the model files (Linux and MacOS)

$ CHEMBFN_WEBUI_MODEL_DIR={YOUR/MODEL/DIR} chembfn

IV. use an external directory to hold the model files (Windows)

# if you use CMD
> set CHEMBFN_WEBUI_MODEL_DIR={YOUR/MODEL/DIR} & chembfn

# if you use PowerShell
> $env:CHEMBFN_WEBUI_MODEL_DIR="{YOUR/MODEL/DIR}" & chembfn

V. use an external directory to hold the model files (Notebook, Google Colab)

import os
os.environ["CHEMBFN_WEBUI_MODEL_DIR"] = "{YOUR/MODEL/DIR}"
!chembfn --public

VI. create an empty folder to hold the model files

$ chembfn --create_model_dir {YOUR/MODEL/DIR}

A structured folder YOUR/MODEL/DIR/model will be created.

4. Write the prompt

• Leave prompt blank for unconditional generation.
• For standalone models, key in objective values in the format of [a,b,c,...] to pass the values to the model.
• Key in <name:A> or <name:A>:[a,b,c,...] to select LoRA parameter and pass the objective values if necessary, where name is the LoRA model name and A is the LoRA scaling. You can easily select a LoRA model by clicking the model name in "LoRA models" tab as well.
• You can stack several LoRA models together to form an ensemble model by prompt like <name1:A1>:[a1,b1,c1,...];<name2:A2>:[a2,b2,...];.... Note that here A1, A2, etc are contributions of each model to the ensemble.

5. Advanced control

Under "advanced control" tab

• You can control semi-autoregressive behaviours by key in F for switching off SAR, T for switching on SAR, and prompt like F,F,T,... to individually control the SAR in an ensemble model.
• You can add unwanted tokens, e.g., [Cu],p,[Si].
• You can customise the result preprocessing function, e.g., the model output a reaction SMILES "CCI.C[O-]>>COCC" which couldn't be recognised by RDKit; you can pass lambda x: x.split(">>")[-1] to force the program only looking at the products.

6. Generate molecules

Click "RUN" then here you go! If error occured, please check your prompts and settings.

Where to obtain the models?

• Pretrained models: https://huggingface.co/suenoomozawa/ChemBFN
• ChemBFN source code: https://github.com/Augus1999/bayesian-flow-network-for-chemistry
• ChemBFN document: https://augus1999.github.io/bayesian-flow-network-for-chemistry/
• ChemBFN package: https://pypi.org/project/bayesianflow-for-chem/