human
Solve the following python programming problem given the following code:
def dump_xml(obj) : 
    'Dumps data into a simple XML format.' 
    def _dump(obj) : 
        if isinstance (obj, dict) : 
            d = dict (obj) 
            obj_type = d.pop ('#type', None) 
            key = start = 'dict' 
            if (obj_type is not None) : 
                if obj_type.startswith ('solace.') : 
                    key = start = obj_type [7 :] 
else : 
                    start += (' type=%s' % quoteattr (obj_type)) 
return ('<%s>%s</%s>' % (start, ''.join ((('<%s>%s</%s>' % (key, _dump (value), key)) for (key, value) in d.iteritems ())), key)) 
if isinstance (obj, (tuple, list)) : 
            def _item_dump(obj) : 
                if (not isinstance (obj, (tuple, list, dict))) : 
                    return ('<item>%s</item>' % _dump (obj)) 
return _dump (obj) 
return ('<list>%s</list>' % ''.join (map (_item_dump, obj))) 
if isinstance (obj, bool) : 
            return ((obj and 'yes') or 'no') 
return escape (unicode (obj)) 
return ('<?xml version="1.0" encoding="utf-8"?><result xmlns="%s">%s</result>' % (XML_NS, _dump (_dump))) 

    
    

    Fix the buggy line: return ('<?xml version="1.0" encoding="utf-8"?><result xmlns="%s">%s</result>' % (XML_NS, _dump (_dump)))
assistant
#Here is Python program to fix the buggy line: return ('<.

return ('<?xml version="1.0" encoding="utf-8"?><result xmlns="%s">%s</result>' % (XML_NS, _dump (obj)))