code: def int2bin(n):
      "From positive integer to list of binary bits, msb at index 0"
      if n:
          bits = []
          while n:
              n, remainder = divmod(n, 2)
              bits.insert(0, remainder)
          return bits
      else:
          return [0]
  
label_desc: Use image node_id 3 for calling a global function with example usage: int2bin(n) and returns: bits, list