Split

[berrytj]

users_over_21, users_under_21 = split(lambda user: user.age >= 21, users)

thoughts? doing it manually is cumbersome, but maybe you have a better way.

over_21 = lambda user: user.age >= 21
users_over_21 = filter(over_21, users)
users_under_21 = filter(complement(over_21), users)

i'd be happy to implement.

[Suor]

Funcy already has such function. And it's named split :)

[Suor]

You might also want to look at whatever. It could be used like this:

from funcy import split
from whatever import _

over, under = split(_.age >= 21, users)

[berrytj]

Wow. I'm flabbergasted that I missed that. Sorry!

[berrytj]

That's a good use case. I had been using the _ from fn.py -- curious if there are differences?

[Suor]

whatever is faster, and it's small single purpose library.

[berrytj]

Good to know