human
Solve the following python programming problem given the following code:
@ Substitution (name = 'ewm') 
@ Appender (_doc_template) 
@ Appender (_bias_template) 
def var(self, bias = False, **kwargs) : 
    'exponential weighted moving variance' 
    def f(arg) : 
        return algos.ewmcov (arg, arg, self.com, int (self.adjust), int (self.ignore_na), int (self.min_periods), int (bias)) 
return self._apply (kwargs, ** kwargs) 

    
    

    Fix the buggy line: return self._apply (kwargs, ** kwargs)
assistant
#Here is Python program to fix the buggy line: return self.

return self._apply (def f(, ** kwargs)