code: def padflip(self, maxlag):
      return LagPolynomial(
          np.r_[self.coef, np.zeros(maxlag - len(self.coef))][::-1]
      )
  
file_path: statsmodels/statsmodels/examples/tsa/lagpolynomial.py
imports: import numpy
  from numpy import polynomial
label_desc: Use image node_id 2 for calling the LagPolynomial obj's underlying member method code with example usage: obj.padflip(maxlag) and returns: LagPolynomial