Jython 2.5.2 / Datomic Snippet (generates __getattribute__ error)

gistfile1.py

from java.io import Reader
from java.io import FileReader

from datomic import Entity
from datomic import Connection
from datomic import Database
from datomic import Peer
from datomic import TxReport
from datomic import Util

uri = "datomic:mem://seattle"

Peer.createDatabase(uri)
conn = Peer.connect(uri)

schema_rdr = FileReader("samples/seattle/seattle-schema.dtm")
schema_tx = Util.readAll(schema_rdr).get(0)
txResult = conn.transact(schema_tx).get()
schema_rdr.close()
print txResult

data_rdr = FileReader("samples/seattle/seattle-data0.dtm")
data_tx = Util.readAll(data_rdr).get(0)
txResult = conn.transact(data_tx).get()
data_rdr.close()
print txResult

try:
    # This little hack works -- it only throws an error the first time
    Peer.tempid("db.part/user")
except:
    pass

# Create a community
temp_id = Peer.tempid("db.part/user")
m = Util.map(":db/id", temp_id, ":community/name", "Easton")
l = Util.list(m)
result = conn.transact(l).get()

print result

try:
    db = conn.db()
except:
    pass

db = conn.db()

# Get a community
try:
    results = Peer.q("[:find ?id :where [?id :community/name \"Easton\"]]", db)
except:
    pass

results = Peer.q("[:find ?id :where [?id :community/name \"Easton\"]]", db)

print results
# [[17592186045788]]

# Update a community
easton_id = (results.iterator().next()).get(0)
update_category_tx = Util.list(Util.map(":db/id", easton_id, 
                                        ":community/category", "free stuff"))
txResult = conn.transact(update_category_tx).get()
print txResult

# Get
results = Peer.q("[:find ?c :where [?c :community/name]]", db)
id = (results.iterator().next()).get(0)

# This generates a "SystemError: __getattribute__ not found on type Db"
entity = db.entity(id)

#print entity.keySet()