code: def _struct_format(size, signed):
      if size == 1:
          return "b" if signed else "B"
      elif size == 2:
          return "h" if signed else "H"
      elif size == 4:
          return "i" if signed else "I"
  
imports: import math
  import struct
  from ctypes import create_string_buffer
label_desc: Use image node_id 5 for calling a global function with example usage: _struct_format(size, signed) and returns: unknown, unknown, unknown