Hello,
I'm using SQLAlchemy 0.8.3, psycopg2 2.5.1, Python 3.3.3 on Windows 7,
PostgreSQL 9.3.1. No change to SQLAlchemy and psycopg2, update from
Python 3.3.2 to 3.3.3 some days ago.
Today I get this when trying to use this combination:
Python 3.3.3 (v3.3.3:c3896275c0f6, Nov 18 2013, 21:19:30) [MSC v.1600 64
bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
import sqlalchemy as sa
psystr = "postgresql+psycopg2://sib:mypassword@gespenst/sib"
psy_engine = sa.create_engine(psystr, echo=True)
psy_conn = psy_engine.connect()
Traceback (most recent call last):
File "C:\Python33\lib\site-packages\sqlalchemy\pool.py", line 768, in
_do_get
return self._pool.get(wait, self._timeout)
sqlalchemy.util.queue.Empty
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Python33\lib\site-packages\sqlalchemy\engine\strategies.py",
line 80, in connect
return dialect.connect(*cargs, **cparams)
File "C:\Python33\lib\site-packages\sqlalchemy\engine\default.py",
line 285, in connect
return self.dbapi.connect(*cargs, **cparams)
File "C:\Python33\lib\site-packages\psycopg2\__init__.py", line 164,
in connect
conn = _connect(dsn, connection_factory=connection_factory,
async=async)
psycopg2.OperationalError
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "<pyshell#40>", line 1, in <module>
psy_conn = psy_engine.connect()
File "C:\Python33\lib\site-packages\sqlalchemy\engine\base.py", line
1641, in connect
return self._connection_cls(self, **kwargs)
File "C:\Python33\lib\site-packages\sqlalchemy\engine\base.py", line
59, in __init__
self.__connection = connection or engine.raw_connection()
File "C:\Python33\lib\site-packages\sqlalchemy\engine\base.py", line
1699, in raw_connection
return self.pool.unique_connection()
File "C:\Python33\lib\site-packages\sqlalchemy\pool.py", line 220, in
unique_connection
return _ConnectionFairy(self).checkout()
File "C:\Python33\lib\site-packages\sqlalchemy\pool.py", line 431, in
__init__
rec = self._connection_record = pool._do_get()
File "C:\Python33\lib\site-packages\sqlalchemy\pool.py", line 788, in
_do_get
con = self._create_connection()
File "C:\Python33\lib\site-packages\sqlalchemy\pool.py", line 225, in
_create_connection
return _ConnectionRecord(self)
File "C:\Python33\lib\site-packages\sqlalchemy\pool.py", line 318, in
__init__
self.connection = self.__connect()
File "C:\Python33\lib\site-packages\sqlalchemy\pool.py", line 379, in
__connect
connection = self.__pool._creator()
File "C:\Python33\lib\site-packages\sqlalchemy\engine\strategies.py",
line 87, in connect
) from e
sqlalchemy.exc.OperationalError: (OperationalError) None None
Using psycopg2 with Python 3.3.3, without SQLAlchemy in the mix, works
as expected.
Using pypostgresql instead of psycopg2 works as expected:
import sqlalchemy
pypgstr = "postgresql+pypostgresql://sib:mypassword@gespenst/sib"
pypg_engine = sqlalchemy.create_engine(pypgstr, echo=True)
pypg_conn = pypg_engine.connect()
2013-11-24 12:24:57,544 INFO sqlalchemy.engine.base.Engine select version()
2013-11-24 12:24:57,602 INFO sqlalchemy.engine.base.Engine {}
2013-11-24 12:24:57,610 INFO sqlalchemy.engine.base.Engine select
current_schema()
2013-11-24 12:24:57,619 INFO sqlalchemy.engine.base.Engine {}
The problem is definitely new, I got it trying to run scripts I've
certainly used without mishap a short time ago. I'm not sure what came
last: updating Python or using SQLAlchemy with psycopg2 the last time.
The last PostgreSQL update (from 9.2.x) came earlier. What can have
happened and what should I do?
Thank you for help,
Sibylle
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