human
Solve the following python programming problem given the following code:
def _predict(self, estimate, label) : 
    class_name = self.__class__.__name__ 
    doc_string = ('
          Predict the %s at certain point in time.

          Parameters:
            time: a scalar or an array of times to predict the value of %s at.

          Returns:
            predictions: a scalar if time is a scalar, a numpy array if time in an array.
          ' % (class_name, estimate)) 
    def predict(time) : 
        predictor = (lambda t : getattr (self, estimate).ix [: t].iloc [(- 1)] [label]) 
        try : 
            return np.array ([predictor (t) for t in time]) 
except TypeError : 
            return predictor (time) 
predict.__doc__ = doc_string 
    return predict 

    
    

    Fix the buggy line: doc_string = ('
          Predict the %s at certain point in time.

          Parameters:
            time: a scalar or an array of times to predict the value of %s at.

          Returns:
            predictions: a scalar if time is a scalar, a numpy array if time in an array.
          ' % (class_name, estimate))
assistant
#Here is Python program to fix the buggy line: doc_string = ('
.

doc_string = ('
          Predict the %s at certain point in time.

          Parameters:
            time: a scalar or an array of times to predict the value of %s at.

          Returns:
            predictions: a scalar if time is a scalar, a numpy array if time in an array.
          ' % (class_name, class_name))