code: def codes_get_size(handle, key):
      # type: (cffi.FFI.CData, str) -> int
      
      size = ffi.new('size_t *')
      _codes_get_size(handle, key.encode(ENC), size)
      return size[0]
docs: Get the number of coded value from a key.
      If several keys of the same name are present, the total sum is returned.
  
      :param bytes key: the keyword to get the size of
  
      :rtype: int