class_docstr: Square Root based NCD
  
  Size of compressed data equals to sum of square roots of counts of every
  element in the input sequence.
code: def _get_size(self, data: Sequence) -> float:
      return sum(self._compress(data).values())
  
imports: from __future__ import annotations
  import codecs
  import math
  from collections import Counter
  from fractions import Fraction
  from itertools import groupby, permutations
  from typing import Any, Sequence, TypeVar
  from .base import Base
label_desc: Use image node_id 3 for calling the SqrtNCD obj's underlying member method code with example usage: obj._get_size(data) and returns: sum