code: def parse(cls, buff, offset):
          
          primitive_struct = struct.Struct("!" + cls.fmt)
  
          value = primitive_struct.unpack_from(buff, offset)[0]
          offset += primitive_struct.size
  
          return value, offset
docs: Given a buffer and offset, returns the parsed value and new offset.
  
          Uses the ``format`` class attribute to unpack the data from the buffer
          and determine the used up number of bytes.