code: def sinc(ctx, x):
      if ctx.isinf(x):
          return 1 / x
      if not x:
          return x + 1
      return ctx.sin(x) / x
  
imports: from ..libmp.backend import xrange
  import math
  import cmath
label_desc: Use image node_id 18 for calling a global function with example usage: sinc(ctx, x) and returns: unknown, unknown, unknown