code: def acoth(ctx, z):
      if not z:
          return ctx.pi * 0.5j
      else:
          return ctx.atanh(ctx.one / z)
  
imports: from ..libmp.backend import xrange
  import math
  import cmath
label_desc: Use image node_id 13 for calling a global function with example usage: acoth(ctx, z) and returns: unknown, ctx