$ python ./generate_family_file.py http://wiki-en.genealogy.net/Main_Page gene
Generating family file from http://wiki-en.genealogy.net/Main_Page
http://wiki-en.genealogy.net/Main_Page
Traceback (most recent call last):
  File "./generate_family_file.py", line 319, in <module>
    FamilyFileGenerator(*sys.argv[1:]).run()
  File "./generate_family_file.py", line 95, in run
    w = Wiki(self.base_url)
  File "./generate_family_file.py", line 242, in __init__
    uo = urlopen(fromurl)
  File "./generate_family_file.py", line 47, in urlopen
    uo = urllib2.urlopen(req)
  File "/usr/lib64/python2.7/urllib2.py", line 127, in urlopen
    return _opener.open(url, data, timeout)
  File "/usr/lib64/python2.7/urllib2.py", line 410, in open
    response = meth(req, response)
  File "/usr/lib64/python2.7/urllib2.py", line 523, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib64/python2.7/urllib2.py", line 448, in error
    return self._call_chain(*args)
  File "/usr/lib64/python2.7/urllib2.py", line 382, in _call_chain
    result = func(*args)
  File "/usr/lib64/python2.7/urllib2.py", line 531, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 504: Gateway Time-out

$ python ./generate_family_file.py http://wiki-de.genealogy.net/Main_Page gene
Generating family file from http://wiki-de.genealogy.net/Main_Page
http://wiki-de.genealogy.net/Main_Page

==================================
api url: http://wiki-de.genealogy.net/w/api.php
MediaWiki version: 1.14.1
==================================

Determining other languages...http://wiki-de.genealogy.net/w/api.php?action=query&meta=siteinfo&siprop=interwikimap&sifilteriw=local&format=json
de en nl sv

There are 4 languages available.
Do you want to generate interwiki links? This might take a long time. ([y]es/[N]o/[e]dit)y
Loading wikis... 
  * de... in cache
  * en... http://wiki-en.genealogy.net/
HTTP Error 504: Gateway Time-out
  * nl... http://wiki-nl.genealogy.net/wiki/
downloaded
  * sv... http://wiki-sv.genealogy.net/
HTTP Error 500: Internal Server Error
Writing pywikibot/families/gene_family.py... 


The resulting family file only includes nl and de

# -*- coding: utf-8 -*-
"""
This family file was auto-generated by $Id: 185033971c163ea46b2b1904773b8c407069a4d0 $
Configuration parameters:
  url = http://wiki-de.genealogy.net/Main_Page
  name = gene

Please do not commit this to the Git repository!
"""

from pywikibot import family

class Family(family.Family):
    def __init__(self):
        family.Family.__init__(self)
        self.name = 'gene'
        self.langs = {
            'nl': 'wiki-nl.genealogy.net',
            'de': 'wiki-de.genealogy.net',
        }



    def scriptpath(self, code):
        return {
            'nl': '/w',
            'de': '/w',
        }[code]

    def version(self, code):
        return {
            'nl': u'1.14.1',
            'de': u'1.14.1',
        }[code]