On Sun, Feb 1, 2015 at 4:36 PM, Rustom Mody <rustompm...@gmail.com> wrote: > The other day I was taking a class in which I was showing > - introspection for discovering -- help, type, dir etc at the repl > - mapping of surface syntax to internals eg. a + b ←→ a.__add__(b) > > And a student asked me the diff between > dir([]) > and > [].__dir__() > > I didnt know what to say...
Simple answer: You write dunder methods and the interpreter calls them. You don't call them yourself. I can't currently think of any situation where it's appropriate to call a dunder method manually (cue the swamping of such situations on the list); you just call dir() or the + operator or whatever it be. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
