code: def pdf(self, x):
      return 0.2 * (0.05 + 0.45 * (1 + np.sin(2 * np.pi * x)))
  
imports: import numpy
  from .common import Benchmark, safe_import
label_desc: Use image node_id 2 for calling the contdist5 obj's underlying member method code with example usage: obj.pdf(x) and returns: unknown