Support browser contexts to launch different sessions about pyppeteer HOT 5 OPEN

import asyncio
from pyppeteer import launch
from pyppeteer.launcher import connect


async def main():
    browser = await connect({'browserWSEndpoint': "ws://127.0.0.1:9222/devtools/browser/622533f4-7515-49d1-83b4-40f1780f4345"})
    page, browserContextId = await browser.newIncognitoPage()
    await page.goto('http://www.baidu.com')
    cookies = await page.cookies()
    print(cookies)

    await page.close()

    if browser._connection:
        await browser._connection.send('Target.disposeBrowserContext', {
            'browserContextId': browserContextId
        })

    await browser.disconnect()

asyncio.get_event_loop().run_until_complete(main())

    browser = await launch()
    
    async def newIncognitoPage(self):
        """Make new page on this browser and return its object."""
        browserContextId = (await self._connection.send(
            'Target.createBrowserContext', {})).get('browserContextId')
        targetId = (await self._connection.send(
            'Target.createTarget',
            {'url': 'about:blank', 'browserContextId': browserContextId})).get('targetId')
        target = self._targets.get(targetId)
        if target is None:
            raise BrowserError('Failed to create target for page.')
        if not await target._initializedPromise:
            raise BrowserError('Failed to create target for page.')
        page = await target.page()
        if page is None:
            raise BrowserError('Failed to create page.')
        return page
    
    
    browser.newIncognitoPage = types.MethodType(newIncognitoPage, browser)```