AttributeError: 'NoneType' object has no attribute 'decode'

[JanySunny]

Try to fix the src/dataset_lmdb_generator.py, delete the 'ascii' as follows: with env.begin(write=True) as txn:

txn.put(d.encode('ascii'), files_str_vec.encode())

            txn.put(d.encode(), files_str_vec.encode())