code: def _log1mexp(x):
      """Numerically stable computation of log(1-exp(x))."""
      if x < -1:
          return math.log1p(-math.exp(x))
      elif x < 0:
          return math.log(-math.expm1(x))
      elif x == 0:
          return -np.inf
      else:
          raise ValueError("Argument must be non-positive.")
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import math
  from absl import app
  import numpy
  import scipy.stats
label_desc: Use image node_id 2 for calling a global function with example usage: _log1mexp(x) and returns: math, math, unknown