[ase-users] storing bytes in ase-db?

[John Kitchin]

Hi, I was trying to store a bytestring in an ase-db like this:

```
import ase.db
from ase import Atoms, Atom
from ase.calculators.lj import LennardJones

db = ase.db.connect('test.db')

atoms = Atoms([Atom('Ar', [0, 0, 0])], cell=(10, 10, 10))
atoms.set_calculator(LennardJones())
atoms.get_potential_energy()

db.write(atoms, data={'hash': b'1'})
```

but it eads to this error

TypeError: Object of type 'bytes' is not JSON serializable.

It is not obvious to me why we shouldn't do (or be able to do) this. It
also does not work as a keyword. Does anyone know a workaround?

John

-----------------------------------
Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
@johnkitchin
http://kitchingroup.cheme.cmu.edu
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