Select as in sqlalchemy

Question

I want to do something like this:

select username, userid, \'user\' as new_column  from  users_table.

The columns of the table can be selec

Answer 1

Maybe literal_column?

query = select([users_table.c.username, users_table.c.userid, literal_column("user", type_=Unicode).label('new_column')])

See https://docs.sqlalchemy.org/en/13/core/sqlelement.html#sqlalchemy.sql.expression.literal_column

Edit: actually I should have said "literal":

query = select([users_table.c.username, users_table.c.userid, literal("user", type_=Unicode).label('new_column')])

Answer 2

use this: users_table.c.userid.label('NewColumn')

i.e.,

query = select([users_table.c.username, users_table.c.userid.label('NewColumn')])

evaluates to:

SELECT username , userid as NewColumn From MyTable;

Answer 3

See the alias() in here: http://www.sqlalchemy.org/docs/05/reference/sqlalchemy/expressions.html