import asyncio
from pyppeteer import launch

link = "https://stackoverflow.com/questions/tagged/web-scraping"

async def fetch(url):
	browser = await launch(headless=True,autoClose=False)
	page = await browser.newPage()
	await page.goto(url)
	linkstorage = []
	elements = await page.querySelectorAll('.summary .question-hyperlink')
	for element in elements:
		linkstorage.append(await page.evaluate('(element) => element.href', element))
	results = await asyncio.gather(*[browse_all_links(link, page) for link in linkstorage])
	return results

async def browse_all_links(link, page):
    await page.goto(link)
    title = await page.querySelectorEval('.question-hyperlink','(e => e.innerText)')
    print(title)

if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    future = asyncio.ensure_future(fetch(link))
    loop.run_until_complete(future)
    loop.close()