Never mind. I had used the Bitbucket *sqlalchemy-access* as a template and
forgot to include the pyodbc.py file from the example in my code. As it
was named pyodbc.py it confused the issue.
Please disregard question.
On Saturday, January 3, 2015 9:30:00 PM UTC-8, Lycovian wrote:
>
> I'm attempting to code up a simple Teradata dialect for SQLAlchemy but am
> getting a curious error complaining of "No module named pyodbc" when I
> attempt to do a create_engine on my Windows box. I'm running on Windows
> 7 (32-bit), with stock Python 2.7 from the Python website and SQLA 0.9.8
> and pyODBC 3.0.7.
>
> PyODBC otherwise works fine otherwise in other tests from Python, but
> fails when SQLAlchemy attempts to __import__ it for some reason. I've
> found several posts regarding this issue for IronPython and other non-stock
> Windows Pythons but nothing that is glaringly obvious as to what is wrong
> with my relatively standard setup.
>
> I'll include the custom dialect files if anyone wants to try it
> themselves. The nose tests also appear to fail with this error.
>
> <snip>
> *# both libs appear to be local to each other's Python site-packages dir*
> In [10]: import sqlalchemy
>
> In [11]: print sqlalchemy.__file__
> C:\Python27\lib\site-packages\sqlalchemy\__init__.pyc
>
> In [12]: import pyodbc
>
> In [13]: print pyodbc.__file__
> C:\Python27\lib\site-packages\pyodbc.pyd
>
> *# pyodbc appears to work*
> In [15]: conn = pyodbc.connect('dsn=td_tms_user')
>
> In [16]: conn.execute('select current_timestamp').fetchone()
> Out[16]: (datetime.datetime(2015, 1, 3, 21, 12, 21, 100000), )
>
> *# loading my custom dialect fails though*
> In [17]: from sqlalchemy.dialects import registry
>
> In [18]: registry.register("teradata.pyodbc",
> "sqlalchemy_teradata.pyodbc", "teradataDialect_pyodbc")
>
> In [19]: engine =
> create_engine('teradata+pyodbc://tms_user:password@td_tms_user')
> ---------------------------------------------------------------------------
> ImportError Traceback (most recent call last)
> <ipython-input-19-36d09e5c6713> in <module>()
> ----> 1 engine =
> create_engine('teradata+pyodbc://tms_user:password@td_tms_user')
>
> C:\Python27\lib\site-packages\sqlalchemy\engine\__init__.pyc in
> create_engine(*args, **kwargs)
> 360 strategy = kwargs.pop('strategy', default_strategy)
> 361 strategy = strategies.strategies[strategy]
> --> 362 return strategy.create(*args, **kwargs)
> 363
> 364
>
> C:\Python27\lib\site-packages\sqlalchemy\engine\strategies.pyc in
> create(self, name_or_url, **kwargs)
> 49 u = url.make_url(name_or_url)
> 50
> ---> 51 dialect_cls = u.get_dialect()
> 52
> 53 if kwargs.pop('_coerce_config', False):
>
> C:\Python27\lib\site-packages\sqlalchemy\engine\url.pyc in
> get_dialect(self)
> 127 else:
> 128 name = self.drivername.replace('+', '.')
> --> 129 cls = registry.load(name)
> 130 # check for legacy dialects that
> 131 # would return a module with 'dialect' as the
>
> C:\Python27\lib\site-packages\sqlalchemy\util\langhelpers.pyc in
> load(self, name)
> 172 def load(self, name):
> 173 if name in self.impls:
> --> 174 return self.impls[name]()
> 175
> 176 if self.auto_fn:
>
> C:\Python27\lib\site-packages\sqlalchemy\util\langhelpers.pyc in load()
> 196 def register(self, name, modulepath, objname):
> 197 def load():
> --> 198 mod = compat.import_(modulepath)
> 199 for token in modulepath.split(".")[1:]:
> 200 mod = getattr(mod, token)
>
> C:\Python27\lib\site-packages\sqlalchemy\util\compat.pyc in import_(*args)
> 138 if len(args) == 4:
> 139 args = args[0:3] + ([str(arg) for arg in args[3]],)
> --> 140 return __import__(*args)
> 141
> 142 callable = callable
>
> *ImportError: No module named pyodbc*
> </snip>
>
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