from datetime import datetime import re categories = [] url = 'http://finance.yahoo.com/d/quotes.csv?e=.csv&f=sl1d1t1&s={query}=X' weight = 100 parser_re = re.compile(r'^\W*(\d+(?:\.\d+)?)\W*([a-z]{3})\W*(?:in)?\W*([a-z]{3})\W*$') def request(query, params): m = parser_re.match(query) if not m: # wrong query return params try: ammount, from_currency, to_currency = m.groups() ammount = float(ammount) except: # wrong params return params q = (from_currency+to_currency).upper() 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']) now_date = datetime.now().strftime('%Y%m%d') url = 'http://finance.yahoo.com/currency/converter-results/{0}/{1}-{2}-to-{3}.html' url = url.format(now_date ,resp.search_params['ammount'] ,resp.search_params['from'].lower() ,resp.search_params['to'].lower() ) results.append({'title': title, 'content': content, 'url': url}) return results