code: def _logpdf(self, x, c):
      return (-1.0 + 1.0 / c) * np.log1p(-c * x)
  
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 3 for calling the genpareto2_gen obj's underlying member method code with example usage: obj._logpdf(x, c) and returns: unknown