How to create objects from a dict where the keys are the name objects and the values are the attributes? Using a loop

Question

class Cars(object):

    def __init__(self,brand=None,color=None,cost=None):
        self.brand = brand
        self.color = color
        self.cost = cost

imagine i have 300 cars (from car1 to car300)

dict = {"car1":["Toyota","Red",10000],
        "car2":["Tesla","White",20000],
        "car3":["Honda","Red",15000] 
       }

What I have tried:

dict1 = globals()
for k,v in dict.items():
    dict1[f"{k}"] = Cars(v[0],v[1],v[2])
    print(k,v)

Is this the best possible way to do it?

Is this an aggressive way to do it?

I wold like to learn a efficient, safe way to do it

See this question: https://stackoverflow.com/questions/1305532/convert-nested-python-dict-to-object — Billy, Apr 28 '22 at 23:11
Don't create dynamic variables. Put them in their own dictionary, not `globals()` — Barmar, Apr 28 '22 at 23:12

Barmar · Answer 1 · 2022-04-29T17:51:38.337

0

Use a dictionary for all the cars, not globals.

You can create it in one step with a dictionary comprehension.

all_cars = {name: Coche(brand, color, cost) for name, (brand, color, cost) in dict.items()}

print(all_cars['car1'].brand)

edited Apr 29 '22 at 17:51

answered Apr 28 '22 at 23:15

Barmar

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Hey thanks for the time ! and from that how can i call the objets.. – Adzo Gomez Apr 29 '22 at 17:37
print(car1.brand) doesn't work – Adzo Gomez Apr 29 '22 at 17:37
I've updated the answer to show how to use the dictionary. – Barmar Apr 29 '22 at 17:51

tdelaney · Accepted Answer · 2022-05-25T20:27:46.980

Close. First, you seem to have a name problem, Cars verses Coche. And you shouldn't use dict as a variable name. And you really need to consider whether putting these variables in the global namespace is a good idea. Besides that, you should not use an F string that doesn't add anything to the variable referenced. You can unpack the list with *v and you use a dict comprehension instead of a loop

my_dict = {k:Cars(*v) for k,v in dict.items()}

How to create objects from a dict where the keys are the name objects and the values are the attributes? Using a loop

2 Answers2