REST countriesへの呼び出し関数

requests_countries.py

import requests
REST_EU_ROOT_URL = "http://restcountries.eu/rest/v2"

def REST_country_request(field='all', name='', params=None):
    headers = {'User-Agent' : 'Mozilla/5.0'}
    
    if params is None:
        params = {}
        
    if field == 'all':
        return requests.get(REST_EU_ROOT_URL + '/all')
    
    url = '%s/%s/%s'%(REST_EU_ROOT_URL, field, name)
    print('Requesting URL: '+url)
    response = requests.get(url, params=params, headers=headers)
    
    if not response.status_code == 200:
        raise Exception('Request failed with status code' + str(response.status_code))
        
    return response

response = REST_country_request('currency', 'usd')
print(response.json())