code: def write_nums(self, f, numbers):
      raise NotImplementedError
  
imports: from array import array
  from whoosh.compat import xrange
  from whoosh.system import emptybytes
  from whoosh.system import pack_byte, unpack_byte
  from whoosh.system import pack_ushort_le, unpack_ushort_le
  from whoosh.system import pack_uint_le, unpack_uint_le
label_desc: Use image node_id 1 for calling the NumberEncoding obj's underlying member method code with example usage: obj.write_nums(f, numbers) without return types