Python如何爬取高德地图地铁线路及站点数据

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# coding=utf-8import requestsimport timeimport jsonimport astimport osimport utilsfrom lxml import etreePAGE_URL = 'http://map.amap.com/subway/index.html?&1100'DATA_URL = 'http://map.amap.com/service/subway?srhdata='HEADER = {    "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36"}def fetchAllCity(url, header):    r = requests.get(url, header)    html = r.content    element = etree.HTML(html)    options = element.xpath("//a[contains(@class, 'city')]")    cities = []    for option in options:        city = {            'id': option.get('id'),            'name': option.get('cityname'),            'text': option.text        }        cities.append(city)    return citiesdef parseCityData(citys):    lw = open('./lwkt.txt', 'w')    lw.write('wkt' + '\n')    pw = open('./pwkt.txt', 'w')    pw.write('wkt' + '\n')    for city in citys:        parseCityPointFromApi(city, lw, pw)def parseCityPointFromApi(city, lw, pw):    url = DATA_URL + "{}_drw_{}.json".format(city['id'], city['name'])    print(url)    json_str = requests.get(url).text    res = json.loads(json_str)    res = res['l']    for r in res:        st = r['st']        coords = []        for s in st:            _coords = s.get('sl', '').split(',')            coords.append(_coords)            pwkt = '"POINT ({} {})"'.format(_coords[0], _coords[1])            pw.write(pwkt + '\n')        new_coords = ','.join(['%s %s' % (coord[0], coord[1]) for coord in coords])        lwkt = '"LINESTRING(%s)"' % new_coords        lw.write(lwkt + '\n')def main():    cities = fetchAllCity(PAGE_URL, HEADER)    print(cities)    parseCityData(cities)if __name__ == '__main__':    main()

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