categories = [] url = 'http://finance.yahoo.com/d/quotes.csv?e=.csv&f=sl1d1t1&s={query}=X' def request(query, params): try: # eg.: "X EUR in USD" ammount, from_currency, _, to_currency = query.split() ammount = float(ammount) except: # wrong params return params q = (from_currency+to_currency).upper() if not q.isalpha(): return params params['url'] = url.format(query=q) params['ammount'] = ammount params['from'] = from_currency params['to'] = to_currency return params def response(resp): global base_url results = [] try: _,conversion_rate,_ = resp.text.split(',', 2) conversion_rate = float(conversion_rate) except: return results title = '{0} {1} in {2} is {3}'.format(resp.search_params['ammount'] ,resp.search_params['from'] ,resp.search_params['to'] ,resp.search_params['ammount']*conversion_rate ) content = '1 {0} is {1} {2}'.format(resp.search_params['from'], conversion_rate, resp.search_params['to']) url = 'http://finance.yahoo.com/currency/converter-results/20131104/{0}-{1}-to-{2}.html'.format(resp.search_params['ammount'], resp.search_params['from'].lower(), resp.search_params['to'].lower()) results.append({'title': title, 'content': content, 'url': url}) return results