get_lastfm_session_key.py

import requests
import hashlib
from urllib.parse import urlencode
import json

api_key = input('API Key: ')
secret = input('Secret: ')

print(f'Open http://www.last.fm/api/auth/?api_key={api_key}')
token = input('Enter the token: ')

api = 'https://ws.audioscrobbler.com/2.0/'
params = {
    'api_key': api_key,
    'method': 'auth.getSession',
    'token': token
}
sig = hashlib.md5(''.join([f'{k}{v}' for k,v in sorted(params.items())]).encode('utf-8') + secret.encode('utf-8')).hexdigest()

session = requests.get(f'https://ws.audioscrobbler.com/2.0/?{urlencode(params)}&api_sig={sig}&format=json').json()
print(json.dumps({'session': session['session']['key'], 'apikey': api_key, 'apisecret': secret}, indent=2))