human
Solve the following python programming problem given the following code:
def func(self) : 
    'Process command' 
    caller = self.caller 
    def get_cmdset_callback(cmdset) : 
        '
            We make use of the cmdhandeler.get_and_merge_cmdsets below. This
            is an asynchronous function, returning a Twisted deferred.
            So in order to properly use this we need use this callback;
            it is called with the result of get_and_merge_cmdsets, whenever
            that function finishes. Taking the resulting cmdset, we continue
            to format and output the result.
            ' 
        string = self.format_output (obj, cmdset) 
        self.msg (string.strip ()) 
if (not self.args) : 
        if hasattr (caller, 'location') : 
            obj = caller.location 
            if (not obj.access (caller, 'examine')) : 
                self.msg (caller.at_look (obj)) 
                return 
get_and_merge_cmdsets (obj, self.session, self.player, obj, 'object').addCallback (get_cmdset_callback) 
else : 
            self.msg ('You need to supply a target to examine.') 
return 
for objdef in self.lhs_objattr : 
        obj_name = objdef ['name'] 
        obj_attrs = objdef ['attrs'] 
        self.player_mode = (utils.inherits_from (caller, 'evennia.players.players.Player') or ('player' in self.switches) or obj_name.startswith ('*')) 
        if self.player_mode : 
            try : 
                obj = caller.search_player (obj_name.lstrip ('*')) 
except AttributeError : 
                obj = caller.search (obj_name.lstrip ('*')) 
else : 
            obj = caller.search (obj_name) 
if (not obj) : 
            continue 
if (not obj.access (caller, 'examine')) : 
            self.msg (caller.at_look (obj)) 
            continue 
if obj_attrs : 
            for attrname in obj_attrs : 
                caller.msg (self.format_attributes (get_cmdset_callback, attrname, crop = False)) 
else : 
            if obj.sessions.count () : 
                mergemode = 'session' 
else : 
                if self.player_mode : 
                    mergemode =...

    
    

    Fix the buggy line: caller.msg (self.format_attributes (get_cmdset_callback, attrname, crop = False))
assistant
#Here is Python program to fix the buggy line: caller.

caller.msg (self.format_attributes (obj, attrname, crop = False))