如何使用feapder的AirSpider抓取动态javascript

import feapder
from lxml import etree


class ChenDa(feapder.AirSpider):
    def start_requests(self):
        yield feapder.Request("http://www.szchenda.com/cn/products/rectifier.html")

    def parse(self, request, response):
        three = etree.HTML(response.text)
        print(response.text)


if __name__ == "__main__":
    ChenDa().start()
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<tr>
    <td align="left" valign="top">
        <div style="width:760px;height:500px;overflow:auto;" align="left">
        <div name="ppforlabel" class="pplabel" lblguid="a06c8aae-f0ce-e111-a745-000b2f4bd113" lbltype="product"></div>
        </div>
    </td>
</tr>Copy