Dft 8 final (deepchem#4074)

* orbconverter and datastruct

* lebedev grid

* multiatoms grid

* truncation rules

* gtoeval pbcintor

* grid

* dfmol del

* dfmol

* cache

* factory

* h5py

* minor format fix

* shift cache

* hamilton cgto

* mol finally and mypy

* formatting

* formatting fix

* minor comment fix

deepchem/utils/__init__.py

@@ -14,6 +14,7 @@
 from deepchem.utils.misc_utils import MathWarning
 from deepchem.utils.misc_utils import Uniquifier
 from deepchem.utils.misc_utils import memoize_method
+from deepchem.utils.misc_utils import get_option
 
 from deepchem.utils.batch_utils import batch_coulomb_matrix_features
 
@@ -144,6 +145,8 @@
     from deepchem.utils.pytorch_utils import to_fortran_order
     from deepchem.utils.pytorch_utils import get_np_dtype
     from deepchem.utils.pytorch_utils import unsorted_segment_max
+    from deepchem.utils.pytorch_utils import estimate_ovlp_rcut
+    from deepchem.utils.pytorch_utils import get_dtype_memsize
 
     from deepchem.utils.safeops_utils import safepow
     from deepchem.utils.safeops_utils import safenorm