code: def _inverse_sigmoid(x):
      return np.log(x / (1 - x))
  
imports: import numpy
  from trax import fastmath
  from trax import layers
  from trax.fastmath import numpy
  from trax.layers.assert_shape import assert_shape
label_desc: Use image node_id 1 for calling a global function with example usage: _inverse_sigmoid(x) and returns: np