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In Python, self is not a keyword, it’s a conventional variable name. You can replace all instances of “self” with “this” and your code will work the same.
Lua might have been a better choice, since
selfis special in lua.Kinda.
Lua defines it implicitly only when you use the
function foo:bar(a, b, c) -- note the colonsyntactic sugar, which gets translated to
function foo.bar(self, a, b, c) -- note the periodIn all cases,
selfis a regular variable name. You can even redeclare a new local with that name even when the old one is in scope.Edit: some typos
I don’t see how what you said is inconsistent with me saying “self” is special in lua. Note that I did not say it’s a keyword.
Derp, I misread.
Python is just distancing itself from JS.
Alternative image for C: Mr. Incredible: “A PARAMETER IS A PARAMETER!”
In Python you can use this as a variable name
In Python you can use 🍆 as a variable name.
Edit: oops, guess I was mistaken, you can use most Unicode but emojis are not valid.
Just going by the reputation, you probably can do this in JavaScript
you might be thinking of Rust.
You can use anything that doesn’t start with a digit or punctuation as a variable name (underscore beginning also allowed) unless it’s a keyword.
_ (sic) as a variable name is often used when a function returns multiple outputs but you only want one
def my_function: return 1, 2, 3 _, two, _ = my_function()Underscore alone is a special variable name and I’m pretty sure anything assigned to it goes straight to garbage collection. Whereas
_myvariableis typically used to indicate a “private” class variable or method (Python doesn’t have private so it’s just a convention)._can also be used in the python interactive terminal to mean ‘last return value’Ie:
> 'string' 'string' > a = _ > print(a) string
I was working on a C code base with classes, inheritance, and polymorphism, all done by hands and macros.
Something like
typedef struct s_some_class { void (*method)(this *s_some_class); } t_some_class;Overall, learning C was the best enabler in my whole career. For instance I was learning Python by tinkering with CPython VM, so when I see these ‘WAT’ quircks I know exactly what’s up.
Interesting, how did they do inheritance? Something like
void *super? Also why not switch to CPP if you wanna do OOP?In general, ‘classes’ declarations were done with macro. I don’t remember the exact code — something akin to
BEGIN_CLASS(A, Parent); CLASS_MEMBER(a...) END_CLASS();The project had started before C++ existed, and the switch would be too costly. It’s not just OOP part, also reflection mechanism with bindings to the homemade scripting language, and multi-platform UI library. It was a gem of its time.
That sounds like quite a challenge to maintain, to speak in euphemisms ;)
Revolutionary technologies of the '80 make me appreciate modern programming languages and especially tooling much more.
Not much experience, but quickly learned .bind() in JS after it switched me to window instead of object.
