is this possible to crawl entire website?

This code is executable and get the link of menu categories of a website but I want to crawl or fetch the entire data of a website

import urllib.request
from urllib.request import Request
from bs4 import BeautifulSoup
theurl = "https://www.feedster.com"
headers =  {'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) 
AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 
Safari/537.11',
'Accept': 
'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
 'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.3',
 'Accept-Encoding': 'none',
 'Accept-Language': 'en-US,en;q=0.8',
 'Connection': 'keep-alive'}
 r = Request(theurl,None, headers)
 the page = urllib.request.urlopen(r)
soup = BeautifulSoup(thepage, "html.parser")
i = soup.ul.findAll('a' ,`` href= True)
for data in i:
print(data)