`Config.known_args_namespace` contains duplicate value

[bluetech]

While looking at another issue I noticed that pytest -Werror results in config.known_args_namespace.pythonwarnings having the value ['error', 'error']. That is the value is duplicated.

This happens because:

• We call the arg parser twice
• -W is defined as append

It's not actively harmful for -W but might be for other cases. Possibly it only affects builtin options so might only affect -W -- I didn't dig too deep.

The second parse was added in 0a27f69

[oliveiraaingrid1906-code]

from playwright.sync_api import sync_playwright, expect
from datetime import datetime
import sys
import traceback

URL = "https://the-internet.herokuapp.com/login"
USER = "tomsmith"
PASS = "SuperSecretPassword!"

HEADLESS = True

RELATORIO = "relatorio_login.html"
SCREEN_OK = "login_success.png"
SCREEN_FAIL = "login_fail.png"

def gerar_relatorio(status, mensagem, screenshot):
data = datetime.now().strftime("%d/%m/%Y %H:%M:%S")

html = f"""
<html>
<head>
    <meta charset="utf-8">
    <title>Evidência de Teste</title>
    <style>
        body {{ font-family: Arial; margin: 30px; }}
        .ok {{ color: green; font-weight: bold; }}
        .fail {{ color: red; font-weight: bold; }}
        img {{ margin-top: 15px; max-width: 100%; border: 1px solid #ccc; }}
    </style>
</head>
<body>
    <h1>Evidência de Login</h1>
    <p><b>Data:</b> {data}</p>
    <p><b>Status:</b>
        <span class="{ 'ok' if status == 'SUCESSO' else 'fail' }">{status}</span>
    </p>
    <p><b>Resultado:</b> {mensagem}</p>
    {f'<img src="{screenshot}">' if screenshot else ''}
</body>
</html>
"""

with open(RELATORIO, "w", encoding="utf-8") as f:
    f.write(html)

def main():
browser = None

try:
    with sync_playwright() as p:
        print("▶ Rodando evidência de login...")

        browser = p.chromium.launch(headless=HEADLESS)
        page = browser.new_page(viewport={"width": 1280, "height": 720})

        page.goto(URL, wait_until="domcontentloaded", timeout=30000)

        page.fill("#username", USER)
        page.fill("#password", PASS)

        with page.expect_navigation():
            page.click("button[type=submit]")

        expect(page.locator("#flash")).to_contain_text(
            "You logged into a secure area!",
            timeout=15000
        )

        page.screenshot(path=SCREEN_OK, full_page=True)
        gerar_relatorio("SUCESSO", "Login realizado com sucesso", SCREEN_OK)

        print("✔ Concluído com sucesso")

except Exception as e:
    print("✖ Falha na execução")

    erro = "".join(traceback.format_exception_only(type(e), e)).strip()

    if 'page' in locals():
        page.screenshot(path=SCREEN_FAIL, full_page=True)
        gerar_relatorio("FALHA", erro, SCREEN_FAIL)
    else:
        gerar_relatorio("FALHA", erro, "")

    sys.exit(1)

finally:
    if browser:
        browser.close()

if name == "main":
main()

pip install playwright
playwright install chromium --with-deps

python run_login.py/``

[EternalRights]

I'd like to take a stab at this. The third parse_known_args call at line 1536 passes self.known_args_namespace as the namespace, which already has the -W values from the second parse. Since -W uses action="append", it gets duplicated. Planning to fix it by using copy.copy(self.option) instead, same as the first two calls.