Extract array name from JSON Python-CodePudding

I am using Python to query an api containing country information found at https://restcountries.com/v3.1/all.

Using the Python script below I am able to iterate over all the objects and extract the name and the country code.

Python Script

import requests
import json

api_url = 'https://restcountries.com/v3.1/all'

response = requests.get(api_url)

json_list = response.json()

for list_item in json_list:
    name = list_item["name"]["common"]
    country_code = list_item["cca2"]
    print(name)

The above works fine for what I need so far, however I also need to extract the currency code for the country and the complication is that the value I need is actually the name of the array eg. "USD": {"name": "United States dollar","symbol": "$"} here I would like to be able to extract "USD".

Example JSON

[
  {
    "name": {
      "common": "United States",
      "official": "United States of America",
      "nativeName": {
        "eng": {
          "official": "United States of America",
          "common": "United States"
        }
      }
    },
    "cca2": "US",
    "currencies": {
      "USD": {
        "name": "United States dollar",
        "symbol": "$"
      }
    },
    "region": "Americas",
    "subregion": "North America"
  }
]

Any help is greatly appreciated

CodePudding user response：

In this case it might be helpful to use the .keys method on the sub dict currencies.

The issue with this is that for some list_items there is no 'currencies' key in which case there is no name to extract. Also in some cases there are more than one!

for list_item in json_list:
    name = list_item["name"]["common"]
    currency_keys = list(list_item.get('currencies', {}).keys())
    print(name)
    print(currency_keys)