Prerequisite : Flask installation
Flask is a lightweight framework written in Python. It is lightweight because it does not require particular tools or libraries and allow rapid web development. today we will create a weather app using flask as a web framework. this weather web app will provide current weather updates of cities searched.
Basic setup :
Create a file and name it as weather.py
Linux command to create a file
touch weather.py
Now, create a folder templates with a file name index.html
Linux command to create a folder and a file
mkdir templates && cd templates && touch index.html
The project folder will look like :
Editing files :
Use your own API key from Weather API and place it in API variable. Now edit weather.py
file.
from flask import Flask, render_template, request
# import json to load JSON data to a python dictionary import json
# urllib.request to make a request to api import urllib.request
app = Flask(__name__)
@app .route( '/' , methods = [ 'POST' , 'GET' ])
def weather():
if request.method = = 'POST' :
city = request.form[ 'city' ]
else :
# for default name mathura
city = 'mathura'
# your API key will come here
api = api_key_here
# source contain json data from api
source = urllib.request.urlopen( 'http://api.openweathermap.org/data/2.5/weather?q =' + city + '&appid =' + api).read()
# converting JSON data to a dictionary
list_of_data = json.loads(source)
# data for variable list_of_data
data = {
"country_code" : str (list_of_data[ 'sys' ][ 'country' ]),
"coordinate" : str (list_of_data[ 'coord' ][ 'lon' ]) + ' ' + str (list_of_data[ 'coord' ][ 'lat' ]),
"temp" : str (list_of_data[ 'main' ][ 'temp' ]) + 'k' ,
"pressure" : str (list_of_data[ 'main' ][ 'pressure' ]),
"humidity" : str (list_of_data[ 'main' ][ 'humidity' ]),
}
print (data)
return render_template( 'index.html' , data = data)
if __name__ = = '__main__' :
app.run(debug = True )
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Navigate to templates/index.html and edit it: link to the index file.
Now you can run the server to see the weather app –
python weather.py