Deleting braces from array

Question

I am trying to delete "{" and "}" from array which looks like:

data = [{'Python'}, {'5'}, {'Golang'}, {'4'}, {'PHP'}, {'3'}]

Solutions like converting array/list to string and after that replacing symbols do not work as expected.

Could you help with it, please?

Im waiting output like: ['Python', '5', 'Golang', '4', 'PHP', '3']

What you have there is a list comprised of a number of sets. What output are you hoping to get? — DarkKnight, Jan 28 '22 at 17:16
How did the data end up in this format? It'd be better to fix the problem at the source: change the code that's spitting out the data to not have the unnecessary `{...}` sets, instead of patching it up afterwards. — John Kugelman, Jan 28 '22 at 17:19
Why do you have a list of sets all containing one item? If they all really contain one item in your real data, then you could just do `[item.pop() for item in data]`, which would turn your list of sets of strings into just a list of strings: `['Python', '5', 'Golang', '4', 'PHP', '3']`. But if you could avoid putting the sets into your list in the first place, and instead just put the strings directly in it, that would make more sense. I get the feeling that this is an "[XY Problem](https://xyproblem.info/)". — Random Davis, Jan 28 '22 at 17:19
Does this answer your question? [How to make a flat list out of a list of lists?](https://stackoverflow.com/questions/952914/how-to-make-a-flat-list-out-of-a-list-of-lists) — Tomerikoo, Jan 28 '22 at 19:46
it happened after scraped data through bs4, I mean {...} format of list — Mykola, Jan 30 '22 at 14:17

score 2 · Accepted Answer · answered Jan 28 '22 at 17:21

2

This array looks to be a list of sets with a single element. You can create a new list of strings:

data = [''.join(my_set) for my_set in data]

The output is:

['Python', '5', 'Golang', '4', 'PHP', '3']

answered Jan 28 '22 at 17:21

Marco Valle

score 1 · Answer 2 · answered Jan 28 '22 at 17:25

1

This may not be the most elegant solution, but it works:

new_data = []
for item in data:
   new_data.append(item.pop())
data = new_data

answered Jan 28 '22 at 17:25

Jakob

score 0 · Answer 3 · answered Jan 28 '22 at 17:19

0

Try:

[list(i)[0] for i in data]

Outputs:

['Python', '5', 'Golang', '4', 'PHP', '3']

answered Jan 28 '22 at 17:19

Multivac

There is no need to convert to a list in order to get a single element out of a set... – Tomerikoo Jan 28 '22 at 19:45

score 0 · Answer 4 · answered Jan 28 '22 at 17:39

0

You can use a generator:

>>> list(s.pop() for s in data)
['Python', '5', 'Golang', '4', 'PHP', '3']

answered Jan 28 '22 at 17:39

dawg

Or just `[s.pop() for s in data]`... (4 bytes shorter :P) – Tomerikoo Jan 28 '22 at 19:46

4 Answers4