python playwright异步批量打开网页

好的，让我来回答你的问题。Python Playwright可以用异步方式批量打开网页。具体的实现可以参考官方文档或者相关教程。如果你需要更详细的帮助和指导，可以提供更具体的问题和场景描述，我会尽力为你解答。

相关问题

python代码示例 playwright异步批量打开网页

以下是一个使用playwright异步批量打开网页的Python代码示例：

import asyncio
from playwright.async_api import Playwright, async_playwright


async def open_page(browser_type: str, url: str):
    async with async_playwright() as p:
        browser: Playwright = await getattr(p, browser_type).launch()
        page = await browser.new_page()
        await page.goto(url)
        await asyncio.sleep(3)
        content = await page.content()
        print(content)
        await browser.close()


async def main():
    urls = [
        "https://www.google.com",
        "https://www.bing.com",
        "https://www.baidu.com",
        "https://www.yahoo.com",
    ]
    browser_types = ["chromium", "firefox", "webkit"]

    tasks = []
    for browser_type in browser_types:
        for url in urls:
            tasks.append(open_page(browser_type, url))

    await asyncio.gather(*tasks)


if __name__ == "__main__":
    asyncio.run(main())

请注意，此代码示例仅供参考，实际应用中需要根据具体情况进行修改。

python 使用playwright异步处理，限制异步数量

我可以回答这个问题。使用playwright异步处理时，可以通过设置最大并发数来限制异步数量。可以使用Python的asyncio库来实现异步操作。在创建异步任务时，可以使用asyncio.Semaphore来控制最大并发数。例如，设置最大并发数为5：

import asyncio
from playwright.async_api import async_playwright

async def fetch_url(url):
    async with asyncio.Semaphore(5):
        async with async_playwright() as p:
            browser = await p.chromium.launch()
            page = await browser.new_page()
            await page.goto(url)
            content = await page.content()
            await browser.close()
            return content

url_list = [...]
tasks = [fetch_url(url) for url in url_list]
results = await asyncio.gather(*tasks)

这样就可以限制异步数量，避免同时发送过多请求导致程序崩溃或被服务器封禁。