Try two expressions with `try except`

I have two expressions. I need to try one expression, if it is raise an exception try another, but if the second raises an exception too - to raise the exception.

I tried this, but it is looks ugly and I am not sure it is the best way to solve this issue:

try:                                                           
    image = self.images.order_by(func.random()).limit(1)       
except:                                                        
    try:                                                       
        image = self.images.order_by(func.rand()).limit(1)     
    except ProgrammingError:                                   
        raise ProgrammingError(                                
            'The database engine must be PostgtreSQL or MySQL')

How do you do it?