import requests
import json

c = requests.get('https://2ch.hk/api/captcha/2chaptcha/service_id')
cid = json.loads(c.text)['id']
cimg = requests.get('https://2ch.hk/api/captcha/2chaptcha/image/' + cid)
cimgfile = open('./captcha.png', 'wb')
cimgfile.write(cimg.content)
cimgfile.close()

ctext = input('Enter captcha: ')

post = {'json': 1,
    'board': 'pr',
    'task': 'post',
    'thread': 1025332,
    'comment': 'тест',
    'captcha_type': '2chaptcha',
    '2chaptcha_id': cid,
    '2chaptcha_value': ctext}


r = requests.post('https://2ch.hk/makaba/posting.fcgi', data = post)
print(r.text)