code: def floordiv(a, b):
      if b == 0:
          return sympy.nan if a == 0 else sympy.zoo
      return a // b
  
imports: import math
  import sympy
  import torch
label_desc: Use image node_id 18 for calling the ReferenceAnalysis obj's underlying member method code with example usage: obj.floordiv(a, b) and returns: unknown, unknown