>>> e.execute("select %s, %s;", ("test", "test2")).fetchall();
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/usr/local/lib/python3.2/dist-packages/sqlalchemy/engine/base.py", line 2243, in execute
    return connection.execute(statement, *multiparams, **params)
  File "/usr/local/lib/python3.2/dist-packages/sqlalchemy/engine/base.py", line 1358, in execute
    params)
  File "/usr/local/lib/python3.2/dist-packages/sqlalchemy/engine/base.py", line 1535, in _execute_text
    statement, parameters
  File "/usr/local/lib/python3.2/dist-packages/sqlalchemy/engine/base.py", line 1586, in _execute_context
    context)
  File "/usr/local/lib/python3.2/dist-packages/sqlalchemy/engine/default.py", line 324, in do_executemany
    cursor.executemany(statement, parameters)
TypeError: not all arguments converted during string formatting