Traceback:

Traceback (most recent call last):
  File "1.py", line 15, in <module>
    s.query(A).options(with_expression(A.expr, text('x')))
  File 
".venv/lib/python3.6/site-packages/sqlalchemy/orm/strategy_options.py", 
line 1438, in with_expression
    False, {"expression": expression})
  File 
".venv/lib/python3.6/site-packages/sqlalchemy/orm/strategy_options.py", 
line 494, in _from_keys
    opt = meth(opt, all_tokens[-1], **kw)
  File 
".venv/lib/python3.6/site-packages/sqlalchemy/orm/strategy_options.py", 
line 1425, in with_expression
    _orm_full_deannotate(expression))
  File "<string>", line 1, in <lambda>
  File ".venv/lib/python3.6/site-packages/sqlalchemy/sql/elements.py", line 
4181, in _labeled
    return element.label(None)
AttributeError: 'TextClause' object has no attribute 'label'


-- 
SQLAlchemy - 
The Python SQL Toolkit and Object Relational Mapper

http://www.sqlalchemy.org/

To post example code, please provide an MCVE: Minimal, Complete, and Verifiable 
Example.  See  http://stackoverflow.com/help/mcve for a full description.
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