code: def cdf(self, x):
      return 0.05 * (x + 1) + 0.9 * (
          1.0 + 2.0 * np.pi * (1 + x) - np.cos(2.0 * np.pi * x)
      ) / (4.0 * np.pi)
  
imports: import numpy
  from .common import Benchmark, safe_import
label_desc: Use image node_id 4 for calling the contdist4 obj's underlying member method code with example usage: obj.cdf(x) and returns: unknown