how to map dictionary keys to variables in python?

Question

I'm making a game that saves information such as funds and stuff like that about users in a shelve. That shelve starts out looking something like this:

Userdata = shelve.open('UserData', writeback = True)
Userdata[username]={'funds' = 100, 
                    'highscore' = 0}

The username variable is defined earlier. The shelve has keys that are usernames, and the values are dictionaries with that user's data. And then, I have some in-game variables that correspond to the values stored in the dictionary:

funds = Userdata[username]['funds']
highscore = Userdata[username]['highscore']

The variables in the dictionary get changed as the user changes the in-game values. The names of the variables will always be the same as the corresponding dictionary key. The problem is, I have quite a few variables in the dictionary. I was wondering if there was a way to map the variables to the corresponding keys in the dictionary in a for loop or something, so that I don't have to define every single one? Thanks!

Why do you need them in a variable name if you're not willing to type it out? By adding them with a for loop you'd likely create a bunch of variables you aren't actually going to use Is there a reason that using them in data stores that are keyed on strings don't work for you? — sedavidw
– sedavidw, Commented Jan 6, 2021 at 0:50
IMHO your variables are too small. They should be members of a class and then you have userstate = Userdata[username] only. You'd then access the funds using userstate.funds and the highscore by userstate.highscore. — Thomas Weller
– Thomas Weller, Commented Jan 6, 2021 at 0:51
I agree with @ThomasWeller,if your data loaded from shelve is a json string, you could use json module to parse to a dict, then you can use userstate.funds to arrive the member variable — ElapsedSoul
– ElapsedSoul, Commented Jan 6, 2021 at 1:01
@ThomasWeller thank you! I just started writing the whole thing again as a class, and this is very helpful. — Angus The Car
– Angus The Car, Commented Feb 17, 2021 at 0:07

drec4s · Accepted Answer · 2021-01-06 00:55:30Z

1

Depending on the scope you can use globals or locals for this:

In [1]: d = {'funds': 100, 'highscore': 0}
   ...: for k in d:
   ...:     locals()[k] = d[k]

In [2]: funds
Out[2]: 100

In [3]: highscore
Out[3]: 0

answered Jan 6, 2021 at 0:55

drec4s

8,1178 gold badges35 silver badges56 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

how to map dictionary keys to variables in python?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related