code: def _ppf(self, q, c):
      vals = -1.0 / c * (np.power(1 - q, c) - 1)
      return vals
  
imports: import numpy
  from scipy import stats
  from scipy.special import comb
  from scipy.stats.distributions import rv_continuous
  import matplotlib.pyplot
  from numpy import where, inf
  from numpy import abs
label_desc: Use image node_id 5 for calling the genpareto2_gen obj's underlying member method code with example usage: obj._ppf(q, c) and returns: vals