I want be able to filter `sqlalchemy` query by checking if `datetime` column is above some date which is 1 day before now().

Any ideas what is the correct syntax to do so? 

**Note**:

1 .sqlalchemy query should look something like that:  

`one_day_interval_before = ?
result = session.query(People).filter(People.registered_at>= one_day_interval_before).all()`

2. datetime retrived in python should be able to be compared to mysql datetime field, in format (year-month-day hour:minutes:seconds)