Mike:
First, thank you very much for the response. However, it doesn't appear to
be an issue with the connection string, but with the automap_base()
function itself. Please see my modified results below:
Python 3.5.1 |Continuum Analytics, Inc.| (default, Feb 16 2016, 09:49:46)
[MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import pyodbc
>>> from sqlalchemy.ext.automap import automap_base
>>> from sqlalchemy.orm import Session
>>> from sqlalchemy import create_engine
>>> def creator():
... return pyodbc.connect('driver={Adaptive Server
Enterprise};server=myurl.url.com;port=8985;database=MyDB;user=sa;password=pass')
...
>>> engine = create_engine("sybase+pyodbc://", creator=creator)
>>> Base = automap_base()
>>> Base.prepare(engine, reflect=True)
Traceback (most recent call last):
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 1044, in _do_get
return self._pool.get(wait, self._timeout)
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\queue.py",
line 145, in get
raise Empty
sqlalchemy.util.queue.Empty
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
line 2074, in _wrap_pool_connect
return fn()
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 318, in unique_connection
return _ConnectionFairy._checkout(self)
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 713, in _checkout
fairy = _ConnectionRecord.checkout(pool)
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 480, in checkout
rec = pool._do_get()
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 1060, in _do_get
self._dec_overflow()
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\langhelpers.py",
line 60, in __exit__
compat.reraise(exc_type, exc_value, exc_tb)
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\compat.py",
line 186, in reraise
raise value
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 1057, in _do_get
return self._create_connection()
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 323, in _create_connection
return _ConnectionRecord(self)
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 449, in __init__
self.connection = self.__connect()
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 607, in __connect
connection = self.__pool._invoke_creator(self)
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 285, in <lambda>
return lambda crec: creator()
File "<stdin>", line 2, in creator
pyodbc.Error: ('IM002', '[IM002] [Microsoft][ODBC Driver Manager] Data
source name not found and no default driver specified (0) (SQ
LDriverConnect)')
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\ext\automap.py",
line 743, in prepare
autoload_replace=False
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\sql\schema.py",
line 3602, in reflect
with bind.connect() as conn:
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
line 2018, in connect
return self._connection_cls(self, **kwargs)
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
line 72, in __init__
if connection is not None else engine.raw_connection()
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
line 2104, in raw_connection
self.pool.unique_connection, _connection)
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
line 2078, in _wrap_pool_connect
e, dialect, self)
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
line 1405, in _handle_dbapi_exception_noconnectio
n
exc_info
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\compat.py",
line 202, in raise_from_cause
reraise(type(exception), exception, tb=exc_tb, cause=cause)
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\compat.py",
line 185, in reraise
raise value.with_traceback(tb)
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
line 2074, in _wrap_pool_connect
return fn()
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 318, in unique_connection
return _ConnectionFairy._checkout(self)
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 713, in _checkout
fairy = _ConnectionRecord.checkout(pool)
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 480, in checkout
rec = pool._do_get()
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 1060, in _do_get
self._dec_overflow()
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\langhelpers.py",
line 60, in __exit__
compat.reraise(exc_type, exc_value, exc_tb)
File
"C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\compat.py",
line 186, in reraise
raise value
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 1057, in _do_get
return self._create_connection()
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 323, in _create_connection
return _ConnectionRecord(self)
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 449, in __init__
self.connection = self.__connect()
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 607, in __connect
connection = self.__pool._invoke_creator(self)
File "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
line 285, in <lambda>
return lambda crec: creator()
File "<stdin>", line 2, in creator
sqlalchemy.exc.DBAPIError: (pyodbc.Error) ('IM002', '[IM002]
[Microsoft][ODBC Driver Manager] Data source name not found and no defa
ult driver specified (0) (SQLDriverConnect)')
>>>
On Friday, June 3, 2016 at 9:23:48 AM UTC-5, Mike Bayer wrote:
>
>
> this is supported by just passing all key/value pairs:
>
>
> >>> from sqlalchemy.dialects.sybase import pyodbc
> >>> dialect = pyodbc.SybaseDialect_pyodbc()
> >>> from sqlalchemy.engine import url
> >>> u =
> url.make_url("sybase+pyodbc:///?user=myuser&password=mypwd&host=my.db.server&database=mydb&driver=FreeTDS&port=1433&TDS_Version=8.0")
>
>
> >>> dialect.create_connect_args(u)
> [['DRIVER={FreeTDS};Server=my.db.server;Database=mydb;UID=myuser;PWD=mypwd;TDS_Version=8.0;port=1433'],
>
>
> {}]
>
>
> also, you can always bypass the URL process entirely using creator:
>
> import pyodbc
>
> def creator():
> return pyodbc.connect(<any parameters you want>)
>
> engine = create_engine("sybase+pyodbc://", creator=creator)
>
>
> finally, ODBC is intended to be used with data source names (DSN)s so
> the best approach would be to use one, FreeTDS supports these directly:
>
> http://www.freetds.org/userguide/odbcinionly.htm
>
>
> when you make an ODBC DSN, now you can use tsql to test your DSNs.
>
>
>
>
>
> On 06/03/2016 09:19 AM, Brad Hudson wrote:
> > Can anyone help with forming a proper connection to Sybase ASE 15.7? I
> > have tried variations of the following unsuccessfully using examples
> > from the following URLs:
> >
> > *
> http://stackoverflow.com/questions/4493614/sqlalchemy-equivalent-of-pyodbc-connect-string-using-freetds
>
> > <
> http://stackoverflow.com/questions/4493614/sqlalchemy-equivalent-of-pyodbc-connect-string-using-freetds>
>
>
> > * http://docs.sqlalchemy.org/en/rel_1_0/orm/extensions/automap.html
> > <http://docs.sqlalchemy.org/en/rel_1_0/orm/extensions/automap.html>
> (Basic
> > Use)
> >
> > Code:
> >
> > Python 3.5.1 |Continuum Analytics, Inc.| (default, Feb 16 2016,
> > 09:49:46) [MSC v.1900 64 bit (AMD64)] on win32
> > Type "help", "copyright", "credits" or "license" for more
> information.
> > >>> import pyodbc
> > >>> from sqlalchemy.ext.automap import automap_base
> > >>> from sqlalchemy.orm import Session
> > >>> from sqlalchemy import create_engine
> > >>> Base = automap_base()
> > >>> cxnstr = 'Driver={Adaptive Server
> > Enterprise};server=myserver.url.com
> > <http://myserver.url.com/>;port=8985;db=MyDB;uid=sa;pwd=restriced'
> > >>> engine =
> > create_engine('sybase+pyodbc:///?odbc_connect={}'.format(cxnstr))
> > >>> Base.prepare(engine, reflect=True)
> > Traceback (most recent call last):
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 1044, in _do_get
> > return self._pool.get(wait, self._timeout)
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\queue.py",
> > line 145, in get
> > raise Empty
> > sqlalchemy.util.queue.Empty
> >
> > During handling of the above exception, another exception occurred:
> >
> > Traceback (most recent call last):
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
> > line 2074, in _wrap_pool_connect
> > return fn()
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 318, in unique_connection
> > return _ConnectionFairy._checkout(self)
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 713, in _checkout
> > fairy = _ConnectionRecord.checkout(pool)
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 480, in checkout
> > rec = pool._do_get()
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 1060, in _do_get
> > self._dec_overflow()
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\langhelpers.py",
>
>
> > line 60, in __exit__
> > compat.reraise(exc_type, exc_value, exc_tb)
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\compat.py",
> > line 186, in reraise
> > raise value
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 1057, in _do_get
> > return self._create_connection()
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 323, in _create_connection
> > return _ConnectionRecord(self)
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 449, in __init__
> > self.connection = self.__connect()
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 607, in __connect
> > connection = self.__pool._invoke_creator(self)
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\strategies.py",
>
>
> > line 97, in connect
> > return dialect.connect(*cargs, **cparams)
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\default.py",
>
>
> > line 385, in connect
> > return self.dbapi.connect(*cargs, **cparams)
> > pyodbc.Error: ('IM002', '[IM002] [Microsoft][ODBC Driver Manager]
> > Data source name not found and no default driver specified (0) (SQ
> > LDriverConnect)')
> >
> > The above exception was the direct cause of the following exception:
> >
> > Traceback (most recent call last):
> > File "<stdin>", line 1, in <module>
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\ext\automap.py",
> > line 743, in prepare
> > autoload_replace=False
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\sql\schema.py",
> > line 3602, in reflect
> > with bind.connect() as conn:
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
> > line 2018, in connect
> > return self._connection_cls(self, **kwargs)
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
> > line 72, in __init__
> > if connection is not None else engine.raw_connection()
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
> > line 2104, in raw_connection
> > self.pool.unique_connection, _connection)
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
> > line 2078, in _wrap_pool_connect
> > e, dialect, self)
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
> > line 1405, in _handle_dbapi_exception_noconnectio
> > n
> > exc_info
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\compat.py",
> > line 202, in raise_from_cause
> > reraise(type(exception), exception, tb=exc_tb, cause=cause)
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\compat.py",
> > line 185, in reraise
> > raise value.with_traceback(tb)
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\base.py",
> > line 2074, in _wrap_pool_connect
> > return fn()
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 318, in unique_connection
> > return _ConnectionFairy._checkout(self)
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 713, in _checkout
> > fairy = _ConnectionRecord.checkout(pool)
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 480, in checkout
> > rec = pool._do_get()
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 1060, in _do_get
> > self._dec_overflow()
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\langhelpers.py",
>
>
> > line 60, in __exit__
> > compat.reraise(exc_type, exc_value, exc_tb)
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\util\compat.py",
> > line 186, in reraise
> > raise value
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 1057, in _do_get
> > return self._create_connection()
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 323, in _create_connection
> > return _ConnectionRecord(self)
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 449, in __init__
> > self.connection = self.__connect()
> > File
> > "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\pool.py",
> > line 607, in __connect
> > connection = self.__pool._invoke_creator(self)
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\strategies.py",
>
>
> > line 97, in connect
> > return dialect.connect(*cargs, **cparams)
> > File
> >
> "C:\brad\anaconda\envs\db-app\lib\site-packages\sqlalchemy\engine\default.py",
>
>
> > line 385, in connect
> > return self.dbapi.connect(*cargs, **cparams)
> > sqlalchemy.exc.DBAPIError: (pyodbc.Error) ('IM002', '[IM002]
> > [Microsoft][ODBC Driver Manager] Data source name not found and no
> defa
> > ult driver specified (0) (SQLDriverConnect)')
> > >>>
> >
> > --
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