code: def sincpi(ctx, x):
      if ctx.isinf(x):
          return 1 / x
      if not x:
          return x + 1
      return ctx.sinpi(x) / (ctx.pi * x)
  
imports: from ..libmp.backend import xrange
  import math
  import cmath
label_desc: Use image node_id 19 for calling a global function with example usage: sincpi(ctx, x) and returns: unknown, unknown, unknown