app.py

import requests
import gradio as gr
import pandas as pd
import os

def fetch_air_quality(city, api_key):
    url = f"http://api.waqi.info/feed/{city}/?token={api_key}"
    response = requests.get(url)
    if response.status_code == 200:
        try:
            data = response.json()
            if 'data' in data and 'aqi' in data['data'] and 'time' in data['data'] and 's' in data['data']['time']:
                aqi = data['data']['aqi']
                timestamp = data['data']['time']['s']
                # Assuming the API's timestamp is in UTC
                timestamp_with_zone = f"{timestamp} UTC"
                return {'City': city, 'AQI': aqi, 'Timestamp': timestamp_with_zone}
            else:
                return {'City': city, 'AQI': 'Data not available', 'Timestamp': 'N/A'}
        except ValueError:
            return {'City': city, 'AQI': 'Invalid response', 'Timestamp': 'N/A'}
    else:
        return {'City': city, 'AQI': 'Error', 'Timestamp': 'N/A'}

def get_air_quality():
    cities = [
        "Amaravati", "Itanagar", "Dispur", "Patna", "Raipur", "Panaji", 
        "Gandhinagar", "Chandigarh", "Shimla", "Ranchi", "Bengaluru", 
        "Thiruvananthapuram", "Bhopal", "Mumbai", "Imphal", "Shillong", 
        "Aizawl", "Kohima", "Bhubaneswar", "Chandigarh", "Jaipur", 
        "Gangtok", "Chennai", "Hyderabad", "Agartala", "Lucknow", 
        "Dehradun", "Kolkata", "Port Blair", "Chandigarh", "Daman", 
        "Kavaratti", "New Delhi", "Puducherry", "Leh"
    ]

    api_key = os.getenv("API_KEY")
    results = [fetch_air_quality(city, api_key) for city in cities]
    df = pd.DataFrame(results)
    return df

def display_air_quality():
    df = get_air_quality()
    return df

iface = gr.Interface(
    fn=display_air_quality,
    inputs=None,
    outputs=gr.Dataframe(label="Air Quality Index by City"),
    title="Air Quality Index Checker",
    description="Displays the AQI and Timestamp (UTC) for various cities."
)

iface.launch()