gistfile1.pytb

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/orm/query.py", line 2024, in first
    ret = list(self[0:1])
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/orm/query.py", line 1918, in __getitem__
    return list(res)
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/orm/query.py", line 2093, in __iter__
    return self._execute_and_instances(context)
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/orm/query.py", line 2106, in _execute_and_instances
    close_with_result=True)
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/orm/query.py", line 2097, in _connection_from_session
    **kw)
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/orm/session.py", line 729, in connection
    close_with_result=close_with_result)
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/orm/session.py", line 735, in _connection_for_bind
    return engine.contextual_connect(**kwargs)
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/engine/base.py", line 2340, in contextual_connect
    self.pool.connect(),
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/pool.py", line 210, in connect
    return _ConnectionFairy(self).checkout()
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/pool.py", line 371, in __init__
    rec = self._connection_record = pool._do_get()
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/pool.py", line 697, in _do_get
    con = self._create_connection()
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/pool.py", line 174, in _create_connection
    return _ConnectionRecord(self)
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/pool.py", line 259, in __init__
    pool.dispatch.first_connect.exec_once(self.connection, self)
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/event.py", line 265, in exec_once
    self(*args, **kw)
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/event.py", line 274, in __call__
    fn(*args, **kw)
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/engine/strategies.py", line 152, in on_connect
    do_on_connect(conn)
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/dialects/postgresql/psycopg2.py", line 335, in on_connect
    fn(conn)
  File "/usr/local/lib/python2.6/dist-packages/sqlalchemy/dialects/postgresql/psycopg2.py", line 329, in on_connect
    extensions.register_type(extensions.UNICODE, conn)
TypeError: argument 2 must be a connection, cursor or None