Introduction:
Welcome to the final post of our Creating a Weather App in NiceGUI series!
In this post, we will integrate the OpenWeatherMap API and fetch real-time weather data based on user input. We will display the temperature, humidity, and wind speed for the user’s chosen location.
Step 1: Registering for OpenWeatherMap API
Sign up on OpenWeatherMap and log in.
Generate an API key:
Go to the API Keys section under your profile.
Click Create Key, give it a name, and copy the key.
This key will allow your app to fetch weather data.
Step 2: Setting Up Environment Variables for API Keys
We’ll use a .env file to securely store the API key. First, install the python-dotenv package to load environment variables from the .env file.
Install python-dotenv:
Create a .env file in the root of your project:
Replace your_openweathermap_api_key with the key you generated earlier.
Step 3: Load the API key
Update main.py to load the API key from the .env file:
Step 4: Fetching Weather Data
We’ll be using the OpenWeatherMap API to retrieve weather details based on the user’s input.
The API key you generated earlier will be used to make requests.
Here’s the function that will handle fetching the weather data asynchronously:
In this function, we use await run.io_bound to make the API call.
Let’s break down why this is necessary:
The requests.get function is a blocking I/O operation, meaning it waits until the external API responds. In a typical synchronous setup, this would block the entire program, causing the UI to freeze until the request is complete.
NiceGUI is designed for asynchronous execution, where multiple tasks can run concurrently. By using await run.io_bound, we can convert this blocking request into an asynchronous I/O operation, allowing the app to remain responsive while waiting for the API response. This keeps the user interface smooth and efficient.
Step 5: Building the UI
Now, let’s set up the NiceGUI interface. This will allow users to enter a location, retrieve weather data, and display the results on the page.
Step 5: Running the App
Once you've set up the UI, your NiceGUI app is ready to run!
The user can input a city name, click on the "Get Weather" button, and see real-time weather data displayed on the screen.
The application will show the current temperature, humidity, and wind speed for the entered location.
Simply run your application with the following command:
Final Thoughts
Congratulations! You’ve successfully built a functional weather app using NiceGUI.
This simple yet powerful app fetches real-time weather data and dynamically updates the UI based on user input.
NiceGUI's intuitive structure and real-time capabilities make it a great choice for building interactive web applications with minimal effort.
If you'd like to dive deeper into NiceGUI, check out their official documentation. You’ll find extensive resources to help you explore more features, like handling forms, advanced layouts, or integrating JavaScript.
Additionally, in this project, we used Tailwind CSS to enhance the UI's appearance with its utility-first approach. Tailwind is a powerful tool for quickly designing modern and responsive layouts. You can explore the Tailwind CSS documentation to learn more about customizing and scaling your designs.
By combining the power of NiceGUI for user interactions and Tailwind CSS for styling, you've created a sleek and responsive app. Keep experimenting with these tools, and feel free to extend your app with more features or adapt it to other use cases.
Stay tuned for more exciting projects, and don’t forget to share your creations with the community.
Happy coding!
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