class_docstr: Entropy based NCD
  
  Get Entropy of input sequence as a size of compressed data.
  
  https://en.wikipedia.org/wiki/Entropy_(information_theory)
  https://en.wikipedia.org/wiki/Entropy_encoding
code: def __init__(
      self, qval: int = 1, coef: int = 1, base: int = 2
  ) -> None:
      self.qval = qval
      self.coef = coef
      self.base = base
  
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 1 to create a new EntropyNCD object from inherited base classes: _NCDBase with example: obj = EntropyNCD(qval, coef, base)