How to remove empty lines with re?

[ted]

I'm having trouble using the re module to remove empty lines in a file.

Here's what I thought would work, but it doesn't:

import re
f = open("old_site/index.html")
for line in f:
    line = re.sub(r'^\s+$|\n', '', line)
    print line

Also, when I try to remove some HTML tags, I get even more empty lines:

import re
f = open("old_site/index.html")
for line in f:
    line = re.sub('<.*?>', '', line)
    line = re.sub(r'^\s+$|\n', '', line)
    print line

I don't know what I'm doing. Any help appreciated.

TIA,
Ted