chess_com.py

#!/bin/python

import requests
from bs4 import BeautifulSoup

cookies = dict(CHESSCOM_REMEMBERME='YOUR_COOKIE')

s = requests.session()

for i in range(1, 7000):
	r = s.get('https://www.chess.com/lessons/view/' + str(i), cookies=cookies)

	soup = BeautifulSoup(r.text, 'html.parser')
	result = soup.body.main.find('div', {'id':'content'}).div['ng-init']

	start = result.find('{')
	end = result.rfind('}') + 1

	with open('lesson_' + str(i) + '.txt', 'a') as myfile:
		myfile.write(str(result[start:end]))