def get(arg):
    attributes['__table_args__'] = {'extend_existing': True,  # allows create same objects at one runtime
                                                  'prefixes': ["TEMPORARY"]}  # always creating temporary table
    return type(result.name, (Base,), attributes)  # returns new class with Properties of Object instance

>>> from app import get, engine
>>> from sqlalchemy.schema import CreateTable
>>> sim = get('sim_number')
>>> sim = get('sim_number') # допустим, понадобилось создать ещё один экземпляр
/usr/local/lib/python3.4/dist-packages/sqlalchemy/ext/declarative/clsregistry.py:167: SAWarning: This declarative base already contains a class with the same class name and module name as bill_classes.sim_number, and will be replaced in the string-lookup table.
  existing.add_item(cls)
Traceback (most recent call last):
  File "/usr/lib/python3.4/code.py", line 90, in runcode
    exec(code, self.locals)
  File "<input>", line 1, in <module>
  File "/media/spicin/7EB7608F698AE718/beeapi/bill_classes.py", line 139, in get
    return type(result.name, (Base,), attributes)  # returns new class with Properties of Object instance
  File "/usr/local/lib/python3.4/dist-packages/sqlalchemy/ext/declarative/api.py", line 55, in __init__
    _as_declarative(cls, classname, cls.__dict__)
  File "/usr/local/lib/python3.4/dist-packages/sqlalchemy/ext/declarative/base.py", line 254, in _as_declarative
    **table_kw)
  File "/usr/local/lib/python3.4/dist-packages/sqlalchemy/sql/schema.py", line 396, in __new__
    table._init_existing(*args, **kw)
  File "/usr/local/lib/python3.4/dist-packages/sqlalchemy/sql/schema.py", line 548, in _init_existing
    self._extra_kwargs(**kwargs)
  File "/usr/local/lib/python3.4/dist-packages/sqlalchemy/sql/schema.py", line 552, in _extra_kwargs
    self._validate_dialect_kwargs(kwargs)
  File "/usr/local/lib/python3.4/dist-packages/sqlalchemy/sql/base.py", line 282, in _validate_dialect_kwargs
    "named <dialectname>_<argument>, got '%s'" % k)
TypeError: Additional arguments should be named <dialectname>_<argument>, got 'prefixes'