import requests
import time
import os
import random

url = 'https://2ch.hk/makaba/posting.fcgi'
data = {
'task': 'post',
'board': 'asylum',
'thread': '491627',
'email': '',
'name': '',
'subject': '',
'comment': '1',
}

pack = 'D:/pics/'

page = requests.get("https://2ch.hk/asylum/res/491627.json").json()

all = page['threads'][0]['posts']
random.shuffle(all)

for post in all:
    filename = random.choice(os.listdir(pack))
    filepath = os.path.join(pack, filename)
    files = {'image1': open(filepath, 'rb').read()}
    data['comment'] = post['comment']
    requests.post(url, data=data,  files=files)
    time.sleep(20)