{"id":9759,"library":"frontend","title":"frontend","description":"The `frontend` library (version 0.0.3) allows developers to build complex and beautiful user interfaces using Python. It abstracts away traditional web technologies, enabling Python developers to create interactive frontends with a Pythonic syntax. As an early-stage project, it is actively developing its core features and API, with a relatively low release cadence reflecting its current development phase.","status":"active","version":"0.0.3","language":"en","source_language":"en","source_url":"https://github.com/AgarwalPragy/frontend","tags":["ui","frontend","web","python-ui","gui","web-framework"],"install":[{"cmd":"pip install frontend","lang":"bash","label":"Install stable version"}],"dependencies":[{"reason":"Used for data validation and modeling within the framework's core.","package":"pydantic","optional":false}],"imports":[{"symbol":"Frontend","correct":"from frontend.main import Frontend"},{"symbol":"View","correct":"from frontend.views import View"}],"quickstart":{"code":"from frontend.main import Frontend\nfrom frontend.views import View\n\napp = Frontend()\n\n@app.route(\"/\")\nclass MyView(View):\n    def render(self):\n        return self.Div(self.H1(\"Hello, Frontend!\"))\n\nif __name__ == \"__main__\":\n    # In a real application, you might run this with uvicorn directly:\n    # uvicorn your_module:app --reload\n    # For this quickstart, app.run() provides a basic server.\n    app.run()","lang":"python","description":"This quickstart demonstrates how to initialize a `Frontend` application, define a basic `View` using a decorator for routing, and render simple HTML elements like `H1` within a `Div`. Running the script will start a local development server, typically accessible at `http://127.0.0.1:8000`."},"warnings":[{"fix":"Pin exact versions of `frontend` in your `requirements.txt` (e.g., `frontend==0.0.3`) and review the GitHub repository's release notes or commit history carefully when upgrading.","message":"The `frontend` library is in a very early development stage (version 0.0.x). The API surface and core components are subject to rapid and potentially breaking changes between minor versions (e.g., 0.0.3 to 0.0.4).","severity":"gotcha","affected_versions":"All 0.0.x versions"},{"fix":"After modifying any state that should cause a UI update, ensure `self.update()` is called, typically at the end of the method (e.g., `def increment(self): self.count += 1; self.update()`).","message":"To trigger UI re-renders after state changes in a `View`, you must explicitly call `self.update()` within your event handlers or state-modifying methods. Without this call, changes to instance attributes will not reflect in the browser.","severity":"gotcha","affected_versions":"All 0.0.x versions"},{"fix":"Instead of `app.run()`, install `uvicorn` (`pip install uvicorn`) and run your application using `uvicorn your_module_name:app --reload` (replace `your_module_name` with the actual Python file name).","message":"The `app.run()` method provided in quickstarts is suitable for basic local development and testing. For production deployments or more robust development setups, it's recommended to use a standard ASGI server like `uvicorn`.","severity":"gotcha","affected_versions":"All 0.0.x versions"}],"env_vars":null,"last_verified":"2026-04-17T00:00:00.000Z","next_check":"2026-07-16T00:00:00.000Z","problems":[{"fix":"Ensure `frontend` is installed using `pip install frontend`. Verify you are running your script with the Python interpreter associated with that installation.","cause":"The `frontend` library has not been installed in the current Python environment, or the environment where the code is being run differs from where it was installed.","error":"ModuleNotFoundError: No module named 'frontend'"},{"fix":"All instance methods in Python classes, including `render` and event handlers, must accept `self` as their first parameter. Correct the method signature to `def render(self):`.","cause":"The `render` method (or another instance method) within your `View` class was defined without `self` as its first argument.","error":"TypeError: render() missing 1 required positional argument: 'self'"},{"fix":"Ensure that any code referencing `self` (to access instance attributes or methods) is located within an instance method (e.g., `__init__`, `render`, or custom event handlers) of your `View` class.","cause":"You are attempting to use the `self` keyword outside of an instance method within a `View` class, or in a static method that doesn't implicitly receive `self`.","error":"NameError: name 'self' is not defined"}]}