Answer by rv.kvetch for How to use a dot "." to access members of dictionary?

I dislike adding another log to a (more than) 10-year old fire, but I'd also check out the dotwiz library, which I've recently released - just this year actually.

It's a relatively tiny library, which also performs really well for get (access) and set (create) times in benchmarks, at least as compared to other alternatives.

Install dotwiz via pip

pip install dotwiz

It does everything you want it to do and subclasses dict, so it operates like a normal dictionary:

from dotwiz import DotWizdw = DotWiz()dw.hello = 'world'dw.hellodw.hello += '!'# dw.hello and dw['hello'] now both return 'world!'dw.val = 5dw.val2 = 'Sam'

On top of that, you can convert it to and from dict objects:

d = dw.to_dict()dw = DotWiz(d) # automatic conversion in constructor

This means that if something you want to access is already in dict form, you can turn it into a DotWiz for easy access:

import jsonjson_dict = json.loads(text)data = DotWiz(json_dict)print data.location.city

Finally, something exciting I am working on is an existing feature request so that it automatically creates new child DotWiz instances so you can do things like this:

dw = DotWiz()dw['people.steve.age'] = 31dw# ✫(people=✫(steve=✫(age=31)))

Comparison with dotmap

I've added a quick and dirty performance comparison with dotmap below.

First, install both libraries with pip:

pip install dotwiz dotmap

I came up with the following code for benchmark purposes:

from timeit import timeitfrom dotwiz import DotWizfrom dotmap import DotMapd = {'hey': {'so': [{'this': {'is': {'pretty': {'cool': True}}}}]}}dw = DotWiz(d)# ✫(hey=✫(so=[✫(this=✫(is=✫(pretty={'cool'})))]))dm = DotMap(d)# DotMap(hey=DotMap(so=[DotMap(this=DotMap(is=DotMap(pretty={'cool'})))]))assert dw.hey.so[0].this['is'].pretty.cool == dm.hey.so[0].this['is'].pretty.cooln = 100_000print('dotwiz (create):  ', round(timeit('DotWiz(d)', number=n, globals=globals()), 3))print('dotmap (create):  ', round(timeit('DotMap(d)', number=n, globals=globals()), 3))print('dotwiz (get):  ', round(timeit("dw.hey.so[0].this['is'].pretty.cool", number=n, globals=globals()), 3))print('dotmap (get):  ', round(timeit("dm.hey.so[0].this['is'].pretty.cool", number=n, globals=globals()), 3))

Results, on my M1 Mac, running Python 3.10:

dotwiz (create):   0.189dotmap (create):   1.085dotwiz (get):   0.014dotmap (get):   0.335