Saving links as text

[hessu]

from urllib.request import urlopen
from bs4 import BeautifulSoup
import re

pages=set()
def getLinks(pageUrl):
    global pages
    html=urlopen("https://heppa.hippos.fi"+pageUrl)
    bsobj=BeautifulSoup(html, 'lxml')
    for link in bsobj.findAll("a", href=re.compile("^(/heppa/)")):
        if 'href' in link.attrs:
            if link.attrs['href'] not in pages:
                newPage=link.attrs['href']
                print(newPage)
                pages.add(newPage)
                getLinks(newPage)
getLinks("")

I'm new in Python and web scraping. I found this code somewhere. Trying modify code so I can save links to file, but I cant.

Please help me.
Thanks in advance.