使用pyppeteer创建for循环的理想方法

Question

我用python结合pyppeteer写了一个脚本，从一个网页上抓取不同咖啡店的名称和电话号码。尽管我尝试了下面的方法来达到目的，但是脚本看起来非常混乱。使用pyppeteer库创建for循环的理想方式是什么？

到目前为止，我已经写了：

import asyncio
from pyppeteer import launch

url = "https://www.yellowpages.com/search?search_terms=coffee&geo_location_terms=Los%20Angeles%2C%20CA"

async def get_names(link):
    wb = await launch(headless=True)
    page = await wb.newPage()
    await page.goto(link)

    containers = await page.querySelectorAll('div.v-card')
    for container in containers:
      name = await container.querySelector('.business-name span')
      phone = await container.querySelector('.phones')
      post = await page.evaluate('(element) => element.textContent', name)
      postAno = await page.evaluate('(element) => element.textContent', phone)
      print(f'{post}--{postAno}')

    await wb.close()

asyncio.get_event_loop().run_until_complete(get_names(url))

Answer 1

我会这样做：

import asyncio
from pyppeteer import launch

url = "https://www.yellowpages.com/search?search_terms=coffee&geo_location_terms=Los%20Angeles%2C%20CA"

async def get_names(link):
    wb = await launch()
    page = await wb.newPage()
    await page.goto(link)

    containers = await page.querySelectorAll('div.v-card')
    for container in containers:
        name = await container.querySelectorEval('.business-name span','e => e.innerText')
        phone = await container.querySelectorEval('.phones','e => e.innerText')
        print(name,phone)

asyncio.get_event_loop().run_until_complete(get_names(url))

Answer 2

试一试：

import asyncio
from pyppeteer import launch

url = "https://www.yellowpages.com/search?search_terms=coffee&geo_location_terms=Los%20Angeles%2C%20CA"

async def get_names(link):
    wb = await launch(headless=True)
    page = await wb.newPage()
    await page.goto(link)

    names = await page.querySelectorAllEval('div.v-card .business-name span',
                                 '(elements => elements.map(e => e.textContent))')
    phones = await page.querySelectorAllEval('div.v-card .phones', 
                                 '(elements => elements.map(e => e.textContent))')
    result = {name: phones[idx] for (idx, name) in enumerate(names)}
    print(result)
    await wb.close()

asyncio.get_event_loop().run_until_complete(get_names(url))

并阅读文档：querySelectorAllEval