code: def _double_factorial(n):
      """The double factorial function for small Python integer `n`."""
      return np.prod(np.arange(n, 1, -2))
  
file_path: tensorflow-upstream/tensorflow/python/ops/distributions/special_math.py
imports: import numpy
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
label_desc: Use image node_id 9 for calling a global function with example usage: _double_factorial(n) and returns: np