code: def pdf(self, x):
      x -= self.shift
      y = 1.0 / (abs(x) + 1.0)
      return y * y
  
imports: import numpy
  from .common import Benchmark, safe_import
label_desc: Use image node_id 2 for calling the contdist3 obj's underlying member method code with example usage: obj.pdf(x) and returns: unknown