class_docstr: Pack various data representations into a buffer.
class_docstr_tok: ["Pack","various","data","representations","into","a","buffer","."]
code: def pack_double(self, x):
      self.__buf.write(struct.pack(">d", x))
  
imports: import struct
  from io import BytesIO
  from functools import wraps
  import warnings
label_desc: Use image node_id 9 for calling the Packer obj's underlying member method code with example usage: obj.pack_double(x) without return types