[BUG] Pyinstaller Windowed application has no stderr #1148
Description
Context:
- Playwright Version: 1.18.2
- Operating System: Windows 10
- Python version: 3.9.2
- Browser: Chromium (probably All)
- Extra: Pyinstaller 4.8
Code Snippet
main.py:
from playwright.sync_api import sync_playwright
START_URL = 'https://playwright.dev/'
if __name__ == "__main__":
exit_code = 1
with sync_playwright() as p:
browser = p.chromium.launch_persistent_context(
headless=False,
devtools=False,
user_data_dir='',
no_viewport=True)
page = browser.new_page()
try:
page.wait_for_timeout(10 * 1000)
page.goto(START_URL,
timeout=None)
page.wait_for_timeout(10 * 1000)
page.screenshot(path="chromium-screenshot.png")
exit_code = 0
except TimeoutError:
print('Timeout occurred waiting for navigation to: ' + START_URL)
browser.close()
sys.exit(exit_code)
requirements.txt:
playwright==1.18.2
pyinstaller==4.8
pyinstaller commands (Batch) - Exception raised:
set PLAYWRIGHT_BROWSERS_PATH=0
playwright install chromium
pyinstaller -F --clean --windowed main.py
pyinstaller commands (Batch) - No Exception:
set PLAYWRIGHT_BROWSERS_PATH=0
playwright install chromium
pyinstaller -F --clean --console main.py
Describe the bug
Pyinstaller can be used to package applications in two forms:
- Console application. Console window created and output can be written to
sys.stdout,sys.stderr - Windowed application. No console created, only a GUI window. No
sys.stdoutorsys.stderr.
If a 'windowed' application is created, an exception occurs in Playwright as it tries to access stderr but this does not exist.
The use case is an GUI application (Tkinter) which uses Playwright to embed a browser session.
Exception stack trace:
Traceback (most recent call last):
File "main.py", line 20, in <module>
File "playwright\sync_api\_context_manager.py", line 70, in __enter__
File "playwright\sync_api\_context_manager.py", line 48, in greenlet_main
File "asyncio\base_events.py", line 642, in run_until_complete
File "playwright\_impl\_connection.py", line 172, in run_as_sync
File "playwright\_impl\_connection.py", line 181, in run
File "playwright\_impl\_transport.py", line 136, in connect
File "playwright\_impl\_transport.py", line 129, in connect
File "playwright\_impl\_transport.py", line 37, in _get_stderr_fileno
AttributeError: 'NullWriter' object has no attribute 'closed'