[python] lmdb

lmdb doc

import lmdb

lmdb_env = lmdb.open(
				lmdb_file,
                ...
           )
       
txn = lmdb_env.begin(write=False)
txn.put('key', 'value')

# 위를 한번에 작성하면

with lmdb.open(...) as env:
	with env.begin(...) as txn:
    	txn.put(...)