Python 2 in Python 3!
Python 2 in Python 3!
A post about how this community's banner used the python 2 print syntax - print "Hello World" - made me question, can we print a hello world message in Python 3 without using parentheses?
It turned out to be sort of a fun challenge, I've found 3 different approaches that work. I'd be interested to see what you come up with! (it seems I can't put spoilers in Lemmy, so I won't share my solutions yet in case y'all want to have a go).
Edit: Posted my solutions in the comments
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Gave some thoughts but couldn't find any. I need the solutions
Alright, here are my solutions :)
- Import Easter egg
import __hello__Not the most technically interesting, but a fun Easter egg!
- Class decorators
@print @lambda _: "Hello World" class Foo: ...Decorators are another way of calling a function, so can be abused to solve this task. You need to decorate a class rather than a function though, since a function definition requires parentheses!
- Dunder methods
class Printer: __class_getitem__ = print Printer["Hello World"]There might be some other Dunder methods you can use to do this, although it's sort of difficult since most (e.g.
__add__) only describe behaviour on the instance of the class.- More dunder methods
from _sitebuiltins import Quitter Quitter.__add__ = print exit + "Hello World"Writing number 3 made me realise I just needed to find a class that already had an instance and change that. I'm sure there are many other cases of this, but here's one!
Very interesting solutions. I was in the direction of using dunder methods but could not figure out how. Haven't heard of the
__class_getitem__. The second solution is especially inspiring.