class_docstr: Pack various data representations into a buffer.
class_docstr_tok: ["Pack","various","data","representations","into","a","buffer","."]
code: def pack_farray(self, n, list, pack_item):
      if len(list) != n:
          raise ValueError("wrong array size")
      for item in list:
          pack_item(item)
  
imports: import struct
  from io import BytesIO
  from functools import wraps
  import warnings
label_desc: Use image node_id 13 for calling the Packer obj's underlying member method code with example usage: obj.pack_farray(n, list, pack_item) without return types