How to use exception_handlerdler method in Playwright Python

Best Python code snippet using playwright-python

test_asyncio.py

Source: test_asyncio.py Github

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...19async def test_should_cancel_underlying_protocol_calls(20 browser_name: str, launch_arguments: Dict21):22 handler_exception = None23 def exception_handlerdler(loop, context) -> None:24 nonlocal handler_exception25 handler_exception = context["exception"]26 asyncio.get_running_loop().set_exception_handler(exception_handlerdler)27 async with async_playwright() as p:28 browser = await p[browser_name].launch(**launch_arguments)29 page = await browser.new_page()30 task = asyncio.create_task(page.wait_for_selector("will-never-find"))31 # make sure that the wait_for_selector message was sent to the server (driver)32 await asyncio.sleep(0.1)33 task.cancel()34 with pytest.raises(asyncio.CancelledError):35 await task36 await browser.close()37 # The actual 'Future exception was never retrieved' is logged inside the Future destructor (__del__)....

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Here's how to initialize playwright browser globally without context managers.

In your particular code, this will work like below:

from playwright.sync_api import Playwright, sync_playwright

locationList = [
    'London Luton Airport',
    'London Hilton',
    'London City',
    'London Wembley',
    'London Battersea',
    'London Shepherds Bush'
]

playwright = sync_playwright().start()  # <-- Use this to initialize playwright globally

chromium = playwright.chromium
browser = chromium.launch(channel="chrome", headless=False)
page = browser.new_page()
page.set_viewport_size({"width": 1920, "height": 1080})
page.goto("https://www.sixt.co.uk/")
page.locator("[data-testid=\"uc-accept-all-button\"]").click()
page.locator("[placeholder=\"Find a location\"]").click()
page.locator("[placeholder=\"Find a location\"]").fill("luton")
page.locator("text=London Luton Airport (GB)").click()
page.locator("button:has-text(\"Show offers\")").click()

def run(playwright: Playwright):

    page.locator("[placeholder=\"Find a location\"]").click()
    page.locator("[placeholder=\"Find a location\"]").fill(loc)
    page.locator('//div[text()="' + loc + '"]').click()
    carnames = page.locator("//h2[@class='vehicle-item__title']")
    #Get all carnames in a list
    carnamelist = [cars.text for cars in carnames]

for loc in locationList:
    run(playwright)

playwright.stop()  # --> Cleanup resources properly when done

However, you can also initialize page and browser from inside the context manager you create in the original question, and it will work as expected.

https://stackoverflow.com/questions/74480301/python-playwright-existing-browser-and-variable-in-function

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