It is likely not the first time such a proposal is being made but let's see. I would like to explicitly set variable names in list comprehensions using a where keyword, eventually set after the if keyword:
[price for item in basket if price is not None where price := item.get( 'price')]
For this example one could use the walrus operator which is indeed smaller: [price for item in basket if price := item.get('price') is not None]
But I fell that this approach is a bit opportunistic as one is doing two things at a time, if you allow me more lines for a somewhat more complex example:
[ price * (1 + vat) for item in basket if price is not None where price := item.get('price') vat := get_vat(item, user) ]
Now this example may look pretty stupid and probably one may simply use for loop, but I feel that this kind of Haskell-like where inside of list comprehension will let the programmer have a space where they can explicitly state the variables.
Best regards, Fabrizio