Python script to create a Gephi network from voteswiper.org data

voteswiper-to-gdf.py

'''
Copyright 2021 Luca Hammer
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in the 
Software without restriction, including without limitation the rights to use, copy, 
modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, 
and to permit persons to whom the Software is furnished to do so, subject to the 
following conditions:
The above copyright notice and this permission notice shall be included in all 
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 
CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 
OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
'''

import requests
from bs4 import BeautifulSoup
import json

r = requests.get('https://www.voteswiper.org/germany/federal-election-2021')
soup = BeautifulSoup(r.content)
data = json.loads(soup.find('script', type='application/json').string)['props']['pageProps']

parties = []
for party in data['parties']:
    overlaps = []
    for party_target in data['parties']:
        overlap = 0
        for i, answers_source in enumerate(party['pivot']['answers']):
            if answers_source['answer'] == party_target['pivot']['answers'][i]['answer']:
                overlap += 1
        overlaps.append({'name' : party_target['name'],
                         'overlap' : overlap})
    
    parties.append({
        'name' : party['name'],
        'overlaps' : overlaps
    })
    
# be sure to choose "merge strategy first" when opening the file in Gephi because 
# each combination appears twice
with open ('2021-08-21-voteswiper_partyoverlaps_federal.gdf', 'w') as f:
    f.write('nodedef>name VARCHAR,label VARCHAR\n')
    f.write('edgedef>node1 VARCHAR,node2 VARCHAR, weight DOUBLE\n')
    for party in parties:
        for overlap in party['overlaps']:
            if party['name'] is not overlap['name']:
                f.write(f"{party['name']},{overlap['name']},{overlap['overlap']}\n")