[Sqlalchemy-tickets] Issue #3201: named=True raises "unexpected argument" for Engine events (zzzeek/sqlalchemy)

[Elmer de L. <iss...@bi...>]

New issue 3201: named=True raises "unexpected argument" for Engine events
https://bitbucket.org/zzzeek/sqlalchemy/issue/3201/named-true-raises-unexpected-argument-for

Elmer de Looff:

The [events documentation](http://docs.sqlalchemy.org/en/rel_0_9/core/event.html#named-argument-styles) notes that since 0.9, the listens_for event decorator accepts a keyword `named`. With this, event arguments are provided as a dict. This works fine for the example of the Pool event, but fails for Engine events (for the current 0.9.7 release).

A testcase to reproduce this and traceback are included as attachments. The relevant code is also included below:

```
#!python
from sqlalchemy.event import listens_for
from sqlalchemy.engine import Engine

@listens_for(Engine, 'before_execute', named=True)
def intercept_execute(conn, **kw):
    print conn.engine.url
```