How do I filter a .json array in python so that only one parameter in each element shows?-CodePudding

like the title says I'm having a problem filtering an array that I'm getting from the CoinGecko API. The array looks like this:

[
  {
    "id": "01coin",
    "symbol": "zoc",
    "name": "01coin"
  },
  {
    "id": "0-5x-long-algorand-token",
    "symbol": "algohalf",
    "name": "0.5X Long Algorand Token"
  },
  {
    "id": "0-5x-long-altcoin-index-token",
    "symbol": "althalf",
    "name": "0.5X Long Altcoin Index Token"
  }
]

After the filter I'd like it to only show the "id"s like this:

[
  "01coin",
  "0-5x-long-algorand-token",
  "0-5x-long-altcoin-index-token"
]

This is how I tried to filter it:

coinList = 'https://api.coingecko.com/api/v3/coins/list'
listCall = requests.get(coinList)
jsonCall = json.loads(listCall.content)
coinIds = [x for x in jsonCall if x == 'id']

CodePudding user response：

Your list comprehension is sort of there, but you should be indexing into each dictionary rather than using an if clause. It should look like:

[item["id"] for item in jsonCall]

This outputs:

['01coin', '0-5x-long-algorand-token', '0-5x-long-altcoin-index-token']