human
Solve the following python programming problem given the following code:
def apply_func(self, filters, type, args, kwargs = None, cache_key = None) : 
    'Apply a filter that is not a "stream in, stream out" transform (i.e.
        like the input() and output() filter methods).  Instead, the filter
        method is given the arguments in ``args`` and should then produce an
        output stream. This is used, e.g., for the concat() and open() filter
        methods.

        Only one such filter can run per operation.

        ``cache_key`` may be a list of additional values to use as the cache
        key, in addition to the default key (the filter and arguments).
        ' 
    assert (type in self.VALID_FUNCS) 
    log.debug ('Need to run method "%s" of one of the filters (%s) with args=%s, kwargs=%s', type, filters, args, kwargs) 
    filters = [f for f in filters if getattr (f, self, None)] 
    if (not filters) : 
        log.debug (('No filters have a "%s" method' % type)) 
        raise NoFilters () 
if (len (filters) > 1) : 
        raise MoreThanOneFilterError (('These filters cannot be combined: %s' % ', '.join ([f.name for f in filters])), filters) 
kwargs_final = self.kwargs.copy () 
    kwargs_final.update ((kwargs or { 
        
})) 
    def func() : 
        filter = filters [0] 
        out = StringIO ('') 
        log.debug ('Running method "%s" of %s with args=%s, kwargs=%s', type, filter, args, kwargs) 
        getattr (filter, type) (out, * args, ** kwargs_final) 
        return out 
additional_cache_keys = [] 
    if kwargs_final : 
        for filter in filters : 
            additional_cache_keys += filter.get_additional_cache_keys (** kwargs_final) 
key = ('hunk', args, tuple (filters), type, (cache_key or []), additional_cache_keys) 
    return self._wrap_cache (key, func) 

    
    

    Fix the buggy line: filters = [f for f in filters if getattr (f, self, None)]
assistant
#Here is Python program to fix the buggy line: filters = [f for f in filters if getattr (f, self, None)]
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filters = [f for f in filters if getattr (f, type, None)]