def countries():
    '''
    get country dictionar from pytz and add some extra.
    '''
    global _countries
    if not _countries:
        v = {}
        _countries = v
        try:
            from pytz import country_names
            for k, n in country_names.items():
                v[k.upper()] = n
        except Exception:
            pass
    return _countries
get country dictionar from pytz and add some extra.