code: def _cauchy_icdf(x):
      x = chainer.as_variable(x)
      h = (x - 0.5) * numpy.pi
      y = chainer.functions.tan(h)
      return y
  
imports: import warnings
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import distribution
  from chainer.functions.math import exponential
  from chainer.functions.math import trigonometric
  from chainer.utils import cache
label_desc: Use image node_id 1 for calling a global function with example usage: _cauchy_icdf(x) and returns: y