python爬虫怎么获得异步加载的源码

<code class="python">from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

# 创建一个 Chrome 浏览器实例
driver = webdriver.Chrome()

# 访问目标页面
driver.get("https://example.com")

# 使用隐式等待，直到 "Load More" 按钮出现
WebDriverWait(driver, 10).until(
    EC.presence_of_element_located((By.ID, "load_more_button"))
)

# 点击 "Load More" 按钮，加载更多内容
driver.find_element(By.ID, "load_more_button").click()

# 获取完整的页面源码
source_code = driver.page_source

# 关闭浏览器
driver.close()</code>

<code class="python">import requests
from requests_html import HTMLSession

# 创建一个 HTML 会话
session = HTMLSession()

# 发送请求并获取响应
response = session.get("https://example.com")

# 自动等待异步加载的内容加载
response.html.render()

# 获取完整的页面源码
source_code = response.html.html</code>

<code class="python">import asyncio
import aiohttp

# 创建一个异步事件循环
event_loop = asyncio.get_event_loop()

# 创建一个异步 HTTP 会话
async def fetch_async(url):
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as response:
            return await response.text()

# 异步加载页面并获取源码
source_code = event_loop.run_until_complete(fetch_async("https://example.com"))</code>