human
Solve the following python programming problem given the following code:
def _gen_case(base, module, i, param) : 
    cls_name = ('%s_param_%d' % (base.__name__, i)) 
    def __str__(self) : 
        name = base.__str__ (self) 
        return ('%s  parameter: %s' % (name, param)) 
mb = dict (param) 
    mb ['__str__'] = __str__ 
    cls = type (cls_name, (base,), mb) 
    setattr (module, cls_name, cls_name) 

    
    

    Fix the buggy line: setattr (module, cls_name, cls_name)
assistant
#Here is Python code to fix the buggy line: setattr (module, cls_name, cls_name)
.

setattr (module, cls_name, cls)