Python api tutorial + flet + json + weather app

sure! in this tutorial, we'll create a simple weather application using python, the flet framework for building user interfaces, and json to handle data. we'll use a weather api to fetch weather data based on user input.

### prerequisites

1. **python**: make sure you have python installed on your system.
2. **flet**: you can install flet using pip.
3. **requests**: we’ll use the requests library to fetch data from the weather api.

to install the necessary libraries, you can run:

### step 1: get api key

### step 2: create the weather app

we'll create a simple weather app that takes a city name as input and displays the current weather information.

#### code example

here’s a complete example of the weather app:

### explanation of the code

1. **import statements**: we import the necessary libraries: `flet` for ui, `requests` for making api calls, and `json` for handling json data.

2. **api configuration**: we set up the base url for the openweathermap api and store the api key.

3. **function `fetch_weather`**: this function sends a get request to the weather api and returns the json response. if the city is found, it returns the data; otherwise, it returns `none`.

4. **flet ui**:
- we create a text field for users to input the city name.
- we have a button that, when clicked, fetches weather data by calling the `fetch_weather` function.
- the result is displayed in a text widget.

### step 3: run the application

### final notes

- make sure to replace `'your_api_key'` with your actual openweathermap api key.
- the app fetches weather data in metric units (celsius). you can change `units` to `imperial` if you prefer fahrenheit.
- this is a simple app, and you can ex ...

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