Arun

> @arunppsg @rbharath "AttributeError: module 'deepchem.molnet' has no attribute 'load_qm7b_from_mat' " error is a recurring error in the latest CI tests. I think this is a new failure. I will...

> 'load_qm7b_from_mat' function is not present in the suite of molnet loaders and is used by 2 files: > > * `examples/qm7/qm7b_DTNN.py` > > * `examples/qm7/qm7b_tf_model.py` > and referenced in...

LGTM! Is this good to merge in? And the CI errors are also not related to this PR.

> * Shouldn't be `pytorch-lightning` included in `requirements/torch/env_torch.mac.cpu.yml`? Yes, pytorch lightning should be added to `env_torch.mac.cpu.yml`. Will you be interested in making a PR for the same? > * Would...

Sounds good! Of the test failures, the first and third are flaky failures. I am not able to reproduce the second failure. Can you run `pytest deepchem/models/tests/test_megnet.py` and check for...

Sorry, I was bit busy. This error is quite peculiar - it raises only when run as a single test but the failure is not captures when run as a...

Hey, I tried this sample code to reproduce the error but I was not able to reproduce it: ``` tasks, datasets, transformers = dc.molnet.load_tox21() train, test, valid = datasets df...

PDBBind dataset supports AtomicConvFeaturizer. For example, see this [tutorial](https://github.com/deepchem/deepchem/blob/master/examples/tutorials/Modeling_Protein_Ligand_Interactions_With_Atomic_Convolutions.ipynb) which uses AtomicConvFeaturizer in PDBBind dataset.

Can you check whether you have installed `mdtraj` and `pdbfixer`? These two are required dependencies when using AtomicConvFeaturizer (ACF). We have also updated DeepChem to give more meaning logs recently...

Do you have tensorflow installed? MultitaskClassifier requires tensorflow backend.