DotDict: A simple Python library to make chained attributes possible

Post by sidmitra » Wed, Aug 02, 2023, 10:12 PM UTC

Post by samwillis » Wed, Aug 02, 2023, 10:20 PM UTC

heisenzombie wrote: post #11

gorgoiler wrote: post #7

Does it lazy-create leaf dicts on access? It would be preferable if they were only created on assignment, and failed if it’s just a get. For example, if I call config.usors.adminn.naem I’d like it to fail loud and fast to point out the typos.

Yeah it does. If you do: x = dd() print(x.tyypo.a.b) you'll get "DotDict()" The problem is that an object can't know whether you're getting a node that you're later going to assign a leaf to... or whether you're getting the node because you want to get the node. x = dd() x.a.b.c = "Foo" is equivalent to: x = dd() y = x.a.b y.c = "Foo" So "x.a.b" can't raise an exception. Now, it's python, so you can do unholy things…

   if a.b.c:
       print("c:", a.b.c)

Post by rozab » Wed, Aug 02, 2023, 10:25 PM UTC

samwillis wrote: post #14

heisenzombie wrote: post #11

Earlier quoted context omitted.

Yeah it does. If you do: x = dd() print(x.tyypo.a.b) you'll get "DotDict()" The problem is that an object can't know whether you're getting a node that you're later going to assign a leaf to... or whether you're getting the node because you want to get the node. x = dd() x.a.b.c = "Foo" is equivalent to: x = dd() y = x.a.b y.c = "Foo" So "x.a.b" can't raise an exception. Now, it's python, so you can do unholy things…

They could add a __bool__ method to the class the returns false when that level of the namespace is empty. That would allow: if a.b.c: print("c:", a.b.c)

Post by richbell » Wed, Aug 02, 2023, 10:28 PM UTC

Waterluvian wrote: post #15

astrea wrote: post #5

This is more of a political statement than a proper library. More to demonstrate the flexibility of Python given I was able to so easily do this.

I enjoy how much complete control Python enables. It’s fun to turn it into what resembles a different language. I want to make a library where you never ever call functions with fn() notation. But just utilize accessors and absolutely bastardize dicts.

Post by astrea » Wed, Aug 02, 2023, 10:30 PM UTC

Izkata wrote: post #8

Toxygene wrote: post #6

Earlier quoted context omitted.

Have I lost my marbles? It doesn't work? (temp5) ~/temp5 pip install . ERROR: Directory '.' is not installable. Neither 'setup.py' nor 'pyproject.toml' found.

Run it from a clone of the repo to install it to the system / your user. I don't see a name to install this from pypi (I see several dotdict libraries on there but they don't link here, so don't know if this is there somewhere).