Python历史天气数据API：wunderground

Question

我正在尝试使用wunderground pythonn API提取历史天气数据，但是我反复收到错误。有人可以帮帮忙：

import requests
def get_precip(gooddate):
urlstart = 'http://api.wunderground.com/api/INSERT_KEY_HERE/history_'
urlend = '/q/Switzerland/Zurich.json'

url = urlstart + str(gooddate) + urlend
data = requests.get(url).json()
for summary in data['history']['dailysummary']:
    print ','.join((gooddate,summary['date']['year'],summary['date']['mon'],summary['date']['mday'],summary['precipm'], summary['maxtempm'], summary['meantempm'],summary['mintempm']))

  

文件“”，第9行       print'，'。join（（gooddate，summary ['date'] ['year']，summary ['date'] ['mon']，summary ['date'] ['mday']，summary ['hillsm ']，' maxtempm”，摘要[ 'meantempm']，摘要[ 'mintempm']））               ^   SyntaxError：语法无效