code: def acot(ctx, z):
      if not z:
          return ctx.pi * 0.5
      else:
          return ctx.atan(ctx.one / z)
  
imports: from ..libmp.backend import xrange
  import math
  import cmath
label_desc: Use image node_id 10 for calling a global function with example usage: acot(ctx, z) and returns: unknown, ctx