Oh I forgot what if you want to return a set from your lambda? Maybe a lambda set should at least have one assignment statement to qualify it as one. Expressions only inside a set syntax will be just a normal set that doesn’t care about order as you pointed out. But a lambda set will care about the order just like when you do a normal multi-lines def function. def f(x): print(x) z = x + 3 return z Is equivalent to (x) => {print(x), z = x + 3, z} since “z = x + 3” is an assignment statement, this would be qualified as a lambda set. Normal set will not be possible as that will throw syntax error. So the side effect is a printed x and the return is just z. If you write something like the following: (x) => {print(x), x +3} Make x = 1 and the return value will be just a normal set of {None, 4} or {4, None} with a printed 1 as a side effect. Abdulla Sent from my iPhone
On 3 Oct 2021, at 8:29 PM, Eric Fahlgren <ericfahlgren@gmail.com> wrote:
I'm somewhat confused by the term "last item of the set", as sets are not ordered and have no "last" element:
{1,3,3,2} {1, 2, 3}
On Sat, Oct 2, 2021 at 8:23 PM Abdulla Al Kathiri <alkathiri.abdulla@gmail.com> wrote: Then use it with the normal expression lambda: people.sort(key=p => (p.salary, p.name, p.id)). You don’t need lambda set for that. If you want to use it, it will be like the following: people.sort(key=p => {(p.salary, p.name, p.id)}). The tuple expression is the last item of the set, so the tuple is the return value. Abdulla
Sent from my iPhone
On 3 Oct 2021, at 2:25 AM, Chris Angelico <rosuav@gmail.com> wrote:
people.sort(key=lambda p: (p.salary, p.name, p.id))
Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-leave@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/YJKNUX... Code of Conduct: http://python.org/psf/codeofconduct/