Python: Only writes last line of output

Question

Trying to write a program that extracts URLs from a website. The output is good, but when I try to write the output to a file, only the last record is written. Here is the code:

Answer 1

As per other answers the file write needs to be inside the loop but also try writing a new line character \n after x:

f = open("f2.txt", "w+")
for x in extractUrls(url):
    print("-", x)
    f.write( x +'\n' ) 
f.close()

Also the line return sorted(collection) if sort else collection has two indents where it should have one.

Also your subdomain code might not give what you expect for things like www.something.com.au which will only return .com.au