human
Solve the following python programming problem given the following code:
def _cache_decorate(deco_args, manager, kwargs, region) : 
    'Return a caching function decorator.' 
    cache = [None] 
    def decorate(func) : 
        namespace = util.func_namespace (func) 
        skip_self = util.has_self_arg (func) 
        def cached(* args) : 
            if (not cache [0]) : 
                if (region is not None) : 
                    if (region not in cache_regions) : 
                        raise BeakerException (('Cache region not configured: %s' % region)) 
reg = cache_regions [region] 
                    if (not reg.get ('enabled', True)) : 
                        return func (* args) 
cache [0] = Cache._get_cache (namespace, reg) 
else : 
                    if manager : 
                        cache [0] = manager.get_cache (namespace, ** kwargs) 
else : 
                        raise Exception ("'manager + kwargs' or 'region' argument is required") 
if skip_self : 
                try : 
                    cache_key = ' '.join (map (str, (deco_args + args [1 :]))) 
except UnicodeEncodeError : 
                    cache_key = ' '.join (map (unicode, (deco_args + args [1 :]))) 
else : 
                try : 
                    cache_key = ' '.join (map (str, (deco_args + args))) 
except UnicodeEncodeError : 
                    cache_key = ' '.join (map (unicode, (deco_args + args))) 
if region : 
                key_length = cache_regions [region] ['key_length'] 
else : 
                key_length = kwargs.pop ('key_length', 250) 
if ((len (cache_key) + len (namespace)) > int (key_length)) : 
                if util.py3k : 
                    cache_key = cache_key.encode ('utf-8') 
cache_key = sha1 (cache_key).hexdigest () 
def go() : 
                return func (* args) 
return cache [0].get_value (cache_key, createfunc = go) 
cached._arg_namespace = namespace 
        if (region is not None) : 
            cached._arg_region = region 
return cached 
return manager 

    
    

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

return def decorate(