Using javascript to parse Set stringified by a python script

Question

I have a python script that spews a stringified Set of strings:

let mySet = "{\"apple\",\"pear\",\"berry\"}"

How can I parse it back into a Set using javascript?

I tried:

eval(mySet)

new Set(mySet)

JavaScript doesn't have a literal representation of sets, so there's no built-in parser. — Barmar, May 26 '22 at 16:15
Can you change the Python code? You can use `json.dumps(list(mySet))`. In JavaScript, you can then use `new Set(JSON.parse(json))` — Barmar, May 26 '22 at 16:16
Does this answer your question? [How to JSON serialize sets?](https://stackoverflow.com/questions/8230315/how-to-json-serialize-sets) — Tibrogargan, May 26 '22 at 16:36
and then (in JavaScript): `set = new Set(JSON.parse(python_set_as_list))` — Tibrogargan, May 26 '22 at 16:39
Thanks @Barmar for pointing it out. I ended up modifying my panda dataframe for the column containing Sets to Lists — asiera, May 27 '22 at 09:15

score 0 · Answer 1 · answered May 26 '22 at 18:59

0

Try this:

      let str = '{\\"apple\\",\\"pear\\",\\"berry\\"}';
      let arr = str.match(/[a-zA-Z]*/g).filter((item) => item);
      const newset = new Set([...arr]);
      console.log(newset);

answered May 26 '22 at 18:59

user2495207

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that wouldn't be very robust as it won't work if the string inside the Set contains number or special chars – asiera May 27 '22 at 08:51
@asiera Yeah but, I think it can be easly adapted changing the expression, `[a-zA-Z0-9_.-]` for example. – user2495207 May 27 '22 at 15:10

Using javascript to parse Set stringified by a python script

1 Answers1