Incompatible: playwright and Jupyter

[maxhumber]

It seems that playwright is incompatible with a Jupyter workflow...

[1] Input Cell:

from playwright import sync_playwright

playwright = sync_playwright().start()

Error:

---------------------------------------------------------------------------
Error                                     Traceback (most recent call last)
<ipython-input-7-238c5383064b> in <module>
      1 from playwright import sync_playwright
      2 
----> 3 playwright = sync_playwright().start()

~/opt/miniconda3/lib/python3.8/site-packages/playwright/__init__.py in sync_playwright()
     25 
     26 def sync_playwright() -> SyncPlaywrightContextManager:
---> 27     return SyncPlaywrightContextManager()
     28 
     29 

~/opt/miniconda3/lib/python3.8/site-packages/playwright/main.py in __init__(self)
     81 class SyncPlaywrightContextManager:
     82     def __init__(self) -> None:
---> 83         self._connection = run_driver()
     84         self._playwright: SyncPlaywright
     85 

~/opt/miniconda3/lib/python3.8/site-packages/playwright/main.py in run_driver()
     75     loop = asyncio.get_event_loop()
     76     if loop.is_running():
---> 77         raise Error("Can only run one Playwright at a time.")
     78     return loop.run_until_complete(run_driver_async())
     79 

Error: Can only run one Playwright at a time.

Likely caused by the fact that Jupyter also uses the event_loop

Would really love to use Playwright with Jupyter!!

[bubthegreat]

Similarly, the asyncio equivalent that would lend itself well to the jupyter notebook's usage of event loop doesn't seem to properly import attributes fo the async_playwright() instance:

async_playwright
import asyncio
from playwright import async_playwright
​
async def main():
    async with async_playwright() as p:
        for browser_type in [p.chromium, p.firefox, p.webkit]:
            browser = await browser_type.launch()
            page = await browser.newPage()
            await page.goto('http://whatsmyuseragent.org/')
            await page.screenshot(path=f'example-{browser_type.name}.png')
            await browser.close()
​
​
await main()
---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
<ipython-input-3-c17ac1e75020> in async-def-wrapper()

<ipython-input-2-dfa9e51be15d> in main()
      3 
      4 async def main():
----> 5     async with async_playwright() as p:
      6         for browser_type in [p.chromium, p.firefox, p.webkit]:
      7             browser = await browser_type.launch()

c:\users\bubth\development\playwright\venv\lib\site-packages\playwright\main.py in __aenter__(self)
    110 
    111     async def __aenter__(self) -> AsyncPlaywright:
--> 112         self._connection = await run_driver_async()
    113         self._connection.run_async()
    114         playwright = AsyncPlaywright(

c:\users\bubth\development\playwright\venv\lib\site-packages\playwright\main.py in run_driver_async()
     43 
     44 async def run_driver_async() -> Connection:
---> 45     package_path = get_file_dirname()
     46     driver_name = compute_driver_name()
     47     driver_executable = package_path / "drivers" / driver_name

c:\users\bubth\development\playwright\venv\lib\site-packages\playwright\path_utils.py in get_file_dirname()
      5 def get_file_dirname() -> Path:
      6     """Returns the callee (`__file__`) directory name"""
----> 7     frame = inspect.stack()[1]
      8     module = inspect.getmodule(frame[0])
      9     assert module

C:\Program Files\Python37\lib\inspect.py in stack(context)
   1511 def stack(context=1):
   1512     """Return a list of records for the stack above the caller's frame."""
-> 1513     return getouterframes(sys._getframe(1), context)
   1514 
   1515 def trace(context=1):

C:\Program Files\Python37\lib\inspect.py in getouterframes(frame, context)
   1488     framelist = []
   1489     while frame:
-> 1490         frameinfo = (frame,) + getframeinfo(frame, context)
   1491         framelist.append(FrameInfo(*frameinfo))
   1492         frame = frame.f_back

C:\Program Files\Python37\lib\inspect.py in getframeinfo(frame, context)
   1462         start = lineno - 1 - context//2
   1463         try:
-> 1464             lines, lnum = findsource(frame)
   1465         except OSError:
   1466             lines = index = None

C:\Program Files\Python37\lib\inspect.py in findsource(object)
    826         pat = re.compile(r'^(\s*def\s)|(\s*async\s+def\s)|(.*(?<!\w)lambda(:|\s))|^(\s*@)')
    827         while lnum > 0:
--> 828             if pat.match(lines[lnum]): break
    829             lnum = lnum - 1
    830         return lines, lnum

IndexError: list index out of range

[mxschmitt]

Thanks for reporting the issue, we merge this as its a duplicate of #178