Checking if a remote file exists in python

Normally, to check if a remote web file exists I would use urllib's getcode() but that is a 2.6 and newer feature. In Python 2.5 its a little more interesting. Thankfully, wget's spider command can help us out.

from subprocess import Popen, PIPE
def url_exists(url):
    command = ["wget", "-S", "--spider", url]
    p = Popen(command, stdout=PIPE, stderr=PIPE)
    stdout, stderr = p.communicate()
    exists = stderr.find('ERROR 404')
    if int(exists) > -1:
        return False
        return True