code: def logit(mu):
      """Logit function that ensures the input is in (0, 1)"""
      mu = force_within_unit_interval(mu)
      return special.logit(mu)
  
imports: from collections import namedtuple
  import numpy
  from scipy import special
  from bambi.utils import multilinify, indentify
label_desc: Use image node_id 9 for calling a global function with example usage: logit(mu) and returns: special