create_engine() error when poolclass=None

[Former user]

import sqlalchemy [BR] engine = sqlalchemy.create_engine('sqlite://', echo=True, poolclass=None)[BR] Traceback (most recent call last):[BR] File "<stdin>", line 1, in ?[BR] File "/usr/lib/python2.4/site-packages/cairo/init.py", line 91, in create_engine[BR] File "build/bdist.linux-i686/egg/sqlalchemy/engine/strategies.py", line 63, in create[BR] File "build/bdist.linux-i686/egg/sqlalchemy/util.py", line 64, in get_cls_kwargs[BR] AttributeError: 'NoneType' object has no attribute 'mro'[BR]

[Mike Bayer]

why send "None" for poolclass ? if poolclass is not defined in **kwargs then it falls back to default, else it uses the argument. i dont see why thats unreasonable.

[Former user]

The doc at "Database Engine Options" says:[BR] poolclass=None - a sqlalchemy.pool.Pool subclass that will be instantated in place of the default connection pool. So I tried to explicitly pass the default argument.

[jek]

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