How do modify dict elmement？

[acekingke]

Given dict in pythonobj = {"a": {"c":1}, "b":2} , I want obj["a"]["c"]=2 , but how to do it in hylang?

[Kodiologist]

I bet you can figure this one out on your own pretty easily. Consider: how do you write c = 2 in Hy? How do you write obj["a"] in Hy? Try building off from there. Let me know if you get stuck.

[acekingke]

yes,

(setv obj {"a" {"c" 1} "b" 2})

how to change obj key c 's value in hy.

[Kodiologist]

Try (setv (get obj "a" "c") 2).

[acekingke]

Thank you very much

[goyalyashpal]

I was also trying to use dictionary, but couldn't figure out the equivalent of python dict's a['3'] in hy
i was referring this hy tutorial: https://docs.hylang.org/en/stable/tutorial.html
& the get operation referred to there: https://docs.hylang.org/en/stable/api.html#hy.pyops.get

(setv a #{1 2  3 4})

a

#{1 2 3 4}

(print a)

{1, 2, 3, 4}

=> (get a 3)
Traceback (most recent call last):
  File "stdin-8d3522acff2f2f4b569e9551e76ef8e5bbb56269", line 1, in <module>
TypeError: 'set' object is not subscriptable
=> (get a "3")
Traceback (most recent call last):
  File "stdin-ee295049c0d832ca7a5417ea612647e2a70c6382", line 1, in <module>
TypeError: 'set' object is not subscriptable

---

Also note the weird order here: "1" 2 "3" 4 -> "3" 2 "1" 4

(setv a #{"1" 2  "3" 4})

a

#{"3" 2 "1" 4}

(print a)

{'3', 2, '1', 4}

=> (print (get a "3"))
Traceback (most recent call last):
  File "stdin-8b322e50ba4b8c8af946bb5553aa07dacbdd0e56", line 1, in <module>
TypeError: 'set' object is not subscriptable

[Kodiologist]

set and dict are different types, with different literal syntax.

[goyalyashpal]

set and dict are different types, with different literal syntax.

yes; did i accidenlty mix those? per the tutorial, i don't think so. but obviously i am missing smth

[Kodiologist]

Yep. Look how you set a above.

[goyalyashpal]

oh, sorry 😆 - i mingled it while reading.

(setv a {"1" 2 "3" 4})
(get a "3")

4

worked 👍