code: def zscore(pvalue):
      """Return the z-score corresponding to a given p-value."""
      pvalue = np.minimum(np.maximum(pvalue, TINY), 1.0 - TINY)
      z = scipy.stats.norm.isf(pvalue)
      return z
  
label_desc: Use image node_id 1 for calling a global function with example usage: zscore(pvalue) and returns: z