時間が無いので雑にメモ．
RDkitのChem.MolFromSmiles()がうるさい時はrdBase.BlockLogs()で黙らせられる．
sample.py
```
from rdkit import Chem
from rdkit import rdBase
## bad code
mol = Chem.MolFromSmiles("c1cc1")
## says :: SMILES Parse Error hogehoge
## to
with rdBase.BlockLogs(None):
mol = Chem.MolFromSmiles("c1cc1")
## says nothing
## print(mol) => None, maybe
```
