How to divide two columns in sqlalchemy

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How generate this SQL, with sqlalchemy

SELECT SUM(click) / SUM(impression) as my_indicator
FROM stats;

session.query(
    func.sum(table.click).label("click"),
    func.sum(table.impression).label("impression"),
    # ??? sum(click) / sum(impression) ???
).group_by(table.type)
sqlalchemy python
1 Answers
from sqlalchemy.sql import label

session.query(
    label('my_indicator', sum(click) / sum(impression))
).group_by(table.type)
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