human
Solve the following python programming problem given the following code:
def cg_str(self) : 
    def _cg_str(self) : 
        if self.link : 
            (yield '" ') 
(yield 'hi ') 
        if self.cleared : 
            (yield 'clear ') 
(yield self.name) 
        (yield ' ') 
        if self.link : 
            (yield ('links to %s' % self.link)) 
else : 
            for (k, v) in self._asdict ().iteritems () : 
                if (k in ('name', 'cleared', 'link')) : 
                    continue 
if (v is not None) : 
                    (yield (' %s=%s' % (k, v))) 
return str.join ('', _cg_str (_cg_str)) 

    
    

    Fix the buggy line: return str.join ('', _cg_str (_cg_str))
assistant
#Here is Python code to fix the buggy line: return str.

return str.join ('', _cg_str (self))