파이썬 크롤링

#-*-coding: utf-8 -*-
import requests
from bs4 import BeautifulSoup
 
def spider(max_pages):
    page = 1
    while page <= max_pages:
        url = 'http://sleep4725.tistory.com/' + str(page)
        source_code = requests.get(url)
        plain_text = source_code.text
        soup = BeautifulSoup(plain_text, 'lxml')
        print (soup)
        page += 1
 
def main():
    spider(3)
if __name__ == "__main__":
    main()