weather - GitPress.io

Example Python program weather.py This program creates a PyQt GUI Python version 3.x or newer. To check the Python version use:

python --version

Modules

import requests
import sys
from PyQt5 import QtCore
from PyQt5.QtWidgets import QApplication, QWidget
from gui import Ui_main
import configparser as cp

Classes

class Main(QWidget):

Methods

def test_connection(forecast_url, current_url):
def display_current(current_url):
def display_forecast(forecast_url, days):
def init(self):
def refresh_current(self):
def refresh_forecast(self):

Code

Example Python PyQt program :

#!/usr/bin/env python

'''Weather desktop widget, fetches current weather from weather underground and
   displays current forecast and 0-2 days of 10 day forecast.'''


import requests
import sys
from PyQt5 import QtCore
from PyQt5.QtWidgets import QApplication, QWidget
from gui import Ui_main
import configparser as cp


def test_connection(forecast_url, current_url):
    try:
        (requests.get(forecast_url).json()['forecast']['simpleforecast']
         ['forecastday'])
        requests.get(current_url).json()['current_observation']
    except:
        print('Could not connect to WeatherUnderground.')


def display_current(current_url):
    current = requests.get(current_url).json()['current_observation']
    display_location = current['display_location']['full']
    update_time = current['observation_time']
    condition = current['weather']
    temp = current['temp_f']
    temp_feelslike = current['feelslike_f']
    wind_chill = current['windchill_f']
    humidity = current['relative_humidity']
    wind_dir = current['wind_dir']
    wind_speed = current['wind_mph']
    icon_url = current['icon_url'].split('/')[-1]

    html = r'''
<!DOCTYPE html>
<html>
<head>
    <title></title>
</head>
<body>
    <div align="right"><img src="img/wu_logo.gif"></div>
    <center>
        <font size="4"><b>{}</b></font><br>
        <font size="2">{}</font>
    </center>
    <font size="1">
    <table style="width:100%">
        <tr>
            <td><b>Temperature:</b> {}°F<br>
            <b>Feels like:</b> {}°F<br>
            <b>Wind Chill:</b> {} °F<br>
            <b>Humidity:</b> {} in<br>
            <b>Wind:</b> {}mph {}<br></td>
            <td>
                <div align="left">
                    <b>Conditions:</b> {}
                </div>
                <center>
                    <img src="img/{}">
                </center>
            </td>
        </tr>
    </table>
    </font>
</body>
</html>
'''.format(display_location, update_time, temp, temp_feelslike, wind_chill,
           humidity, wind_speed, wind_dir, condition, icon_url)
    return html


def display_forecast(forecast_url, days):
    forecast = (requests.get(forecast_url).json()['forecast']['simpleforecast']
                ['forecastday'])
    weekday = forecast[days]['date']['weekday']
    if days == 0:
        weekday = 'Today'
    condition = forecast[days]['conditions']
    condition_icon = forecast[days]['icon_url']
    condition_icon = condition_icon.split('/')[-1]
    temp_high = forecast[days]['high']['fahrenheit']
    temp_low = forecast[days]['low']['fahrenheit']
    qpf_allday = forecast[days]['qpf_allday']['in']
    snow_allday = forecast[days]['snow_allday']['in']

    html = r'''
<!DOCTYPE html>
<html>
<body>
    <center>
        <font size="1"><b>{}</b><br>
        {}°F / {}°F</font><br>
        <img src="img/{}">
    </center>
    <div align="left"><font size="1">
    <b>Conditions:</b> {}<br>
    <b>Percipitation:</b> {} in<br>
    <b>Snow Fall:</b> {} in
    </div></font>
</body>
</html>
    '''.format(weekday, temp_high, temp_low, condition_icon, condition,
               qpf_allday, snow_allday)
    return html


class Main(QWidget):
    def __init__(self):
        super(Main, self).__init__()
        self.ui = Ui_main()
        self.window = QWidget()
        self.ui.setupUi(self)
        base_url = 'http://api.wunderground.com/api/'
        conf = cp.ConfigParser()
        conf.read('settings.conf')
        api_key = conf['SETTINGS']['API_KEY']
        state = conf['SETTINGS']['STATE']
        city = conf['SETTINGS']['CITY']
        self.forecast_url = '{}{}/forecast10day/q/{}/{}.json'.format(base_url,
                                                                api_key, state,
                                                                city)
        self.current_url = '{}{}/conditions/q/{}/{}.json'.format(base_url, api_key,
                                                            state, city)
        #self.setWindowFlags(QtCore.Qt.Tool) # don't show in task manager
        test_connection(self.forecast_url, self.current_url)
        self.ui.weather_box0.insertHtml(display_current(self.current_url))
        self.ui.weather_box1.insertHtml(display_forecast(self.forecast_url, 0))
        self.ui.weather_box2.insertHtml(display_forecast(self.forecast_url, 1))
        self.ui.weather_box3.insertHtml(display_forecast(self.forecast_url, 2))

        self.ui.weather_box0.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
        self.ui.weather_box1.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
        self.ui.weather_box2.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
        self.ui.weather_box3.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)

        self.current_timer = QtCore.QTimer()
        self.current_timer.start(900000)
        self.current_timer.timeout.connect(self.refresh_current)

        self.forecast_timer = QtCore.QTimer()
        self.forecast_timer.start(3600000)
        self.forecast_timer.timeout.connect(self.refresh_forecast)

    def refresh_current(self):
        self.ui.weather_box0.clear()
        self.ui.weather_box0.insertHtml(display_current(self.current_url))

    def refresh_forecast(self):
        self.ui.weather_box1.clear()
        self.ui.weather_box2.clear()
        self.ui.weather_box3.clear()
        self.ui.weather_box1.insertHtml(display_forecast(self.forecast_url, 0))
        self.ui.weather_box2.insertHtml(display_forecast(self.forecast_url, 1))
        self.ui.weather_box3.insertHtml(display_forecast(self.forecast_url, 2))

if __name__ == '__main__':
    app = QApplication(sys.argv)
    main = Main()
    main.show()
    sys.exit(app.exec_())

Useful Links

Articles: https://python-commandments.org/
PyQt: https://pythonpyqt.com/
Tutorial: https://pythonprogramminglanguage.com/