human
Solve the following python programming problem given the following code:
def condition(etag_func = None, last_modified_func = None) : 
    '
    Decorator to support conditional retrieval (or change) for a view
    function.

    The parameters are callables to compute the ETag and last modified time for
    the requested resource, respectively. The callables are passed the same
    parameters as the view itself. The Etag function should return a string (or
    None if the resource doesn\'t exist), whilst the last_modified function
    should return a datetime object (or None if the resource doesn\'t exist).

    If both parameters are provided, all the preconditions must be met before
    the view is processed.

    This decorator will either pass control to the wrapped view function or
    return an HTTP 304 response (unmodified) or 412 response (preconditions
    failed), depending upon the request method.

    Any behavior marked as "undefined" in the HTTP spec (e.g. If-none-match
    plus If-modified-since headers) will result in the view function being
    called.
    ' 
    def decorator(func) : 
        @ wraps (func, assigned = available_attrs (func)) 
        def inner(request, * args, **kwargs) : 
            if_modified_since = request.META.get ('HTTP_IF_MODIFIED_SINCE') 
            if if_modified_since : 
                if_modified_since = parse_http_date_safe (if_modified_since) 
if_none_match = request.META.get ('HTTP_IF_NONE_MATCH') 
            if_match = request.META.get ('HTTP_IF_MATCH') 
            if (if_none_match or if_match) : 
                try : 
                    etags = parse_etags ((if_none_match or if_match)) 
except ValueError : 
                    if_none_match = None 
                    if_match = None 
if etag_func : 
                res_etag = etag_func (request, * args, ** kwargs) 
else : 
                res_etag = None 
if last_modified_func : 
                dt = last_modified_func (request, * args, ** kwargs) 
                if dt : 
                    res_last_modified = timegm (dt.utctimetuple ()) 
else : 
                   ...

    
    

    Fix the buggy line: return last_modified_func
assistant
#Here is Python code to fix the buggy line: return last_modified_func
.

return def decorator(