zeusbottom

My favorite way to implement this is with decorators. I used this to make a dispatch table for reading objects from a MySQL database.

(Yes I know I should be using UserDict below. You should too and don't subclass dict like I did.)

class FuncRegistry(dict):
    """Creates a registry of hashable objects to function mappings."""
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

    def register_for(self, key: Hashable) -> Callable:
        """Decorator to register functions in the registry.

        Parameters

        key: Hashable
            The key which should point to this function

        Returns: Callable
            Returns a decorator that registers the function to the key"""
        def decorator(fn: Callable) -> Callable:
            self[key] = fn
            return fn
        return decorator

qreg = FuncRegistry()

@qreg.register_for('foobr')
def handle_foobr(arg1, arg2):
    # do something here then
    return

qreg['foobr']('ooo its an arg', 'oh look another arg')

edit: formatting

Fantastic news. This will help me immensely!

Having it run locally would be even more help for my use cases. I often have lists of IP addresses in my sheets, and it would be helpful to ping them directly from Python code. But I can work around that with fping or nmap.

Sounds like this won’t be the right tool for your use case

I’m not complaining, just reflecting that it is weird to me. The static type checker is almost an admission that type checking is a Good Thing, but Python continues to resist adding runtime checking. Modules like typing and Protocol don’t seem to do anything at runtime, and because of that are deeply weird to me - what kind of include doesn’t have runtime code? I haven’t seen anything quite like it in any other language I’ve coded in. It just seems included for the coders’ IDE to throw warnings, and that’s it.

Then again, it’s entirely possible I just don’t get around much. I’m not a software guy, I’m hardware, and occasionally I’ll write a tool or website to help with a specific task.

I suppose the alternative is just as weird or weirder, where there are almost two separate languages, one strongly typed and one not typed at all.

It’s very weird to me that Python, as an inherently untyped language, is trying to bolt on stronger typing through modules like Protocol and typing.

If typing is a good thing, why not make it an optional first-class part of the language? Maybe make strong typing a one liner option at the top of a source file? This growing maze of modules and recommendations is so unwieldy. For example, the typing module works kind of in conjunction with language elements that aren’t what newbs learn in Python 101, like type specifiers in function args. I feel like this stuff is driving Python away from simplicity.