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\n\n\n\"\"\"\n\nif __name__ == '__main__':\n # Create a webview window\n window = webview.create_window(\n 'My First Pywebview App',\n html=html_content,\n width=800, \n height=600\n )\n \n # Start the webview application. \n # The 'hello_world' function will be called when the window is ready.\n webview.start(hello_world, window)\n","lang":"python","description":"This quickstart creates a simple pywebview window, loads HTML content, exposes a Python function to JavaScript, and calls it from the browser context to update a paragraph on the page."},"warnings":[{"fix":"Upgrade your Python environment to 3.8+ or pin pywebview to `<6.0` (e.g., `pip install pywebview<6.0`).","message":"Pywebview versions 6.x and higher require Python 3.8 or newer. Applications targeting older Python versions must use pywebview 5.x or earlier.","severity":"breaking","affected_versions":"6.0+"},{"fix":"Ensure the necessary system webview components are installed and up-to-date for your operating system. Consult the pywebview documentation's 'Installation' or 'Deployment' sections for platform-specific requirements.","message":"Pywebview relies on native web rendering engines (e.g., WebView2 on Windows, WebKit on macOS, WebKitGTK/QtWebEngine on Linux). Missing system dependencies or an outdated browser component can lead to `webview.start()` failures, blank windows, or unexpected rendering issues.","severity":"gotcha","affected_versions":"All"},{"fix":"For asynchronous integration or to run alongside other GUI loops, use `import threading; threading.Thread(target=webview.start, args=(callback, window)).start()` or refer to the documentation for using `webview.GUI()` to manage the event loop explicitly.","message":"The `webview.start()` function is blocking by default. Integrating pywebview with existing asynchronous code or other GUI toolkits often requires running `webview.start()` in a separate thread or using advanced non-blocking patterns.","severity":"gotcha","affected_versions":"All"},{"fix":"Refer to the pywebview documentation's 'Deployment' section for PyInstaller-specific hooks and configuration examples (e.g., `--add-data 'webview:webview'` or similar, depending on your environment and pywebview version). Test your bundled application thoroughly.","message":"When bundling applications with PyInstaller, specific configurations and hooks might be necessary to ensure pywebview's bundled resources and dynamic libraries are correctly included, especially for different webview backends. Failures can manifest as blank windows, crashes, or missing assets.","severity":"gotcha","affected_versions":"All"}],"env_vars":null,"last_verified":"2026-04-13T00:00:00.000Z","next_check":"2026-07-12T00:00:00.000Z"}