code: def compare_sliding_window(self, str_a, str_b, window_length=50, curse_forward=20):
          
  
          if self.stem_words:
              stemmer = Stemmer()
              str_a = stemmer.stem(str_a)
              str_b = stemmer.stem(str_b)
  
          substrs_a = self._str_to_windows(str_a, window_length, curse_forward)
          substrs_b = self._str_to_windows(str_b, window_length, curse_forward)
  
          # Build
          comparisons = self._calculate_ratios(substrs_a, substrs_b)
  
          return comparisons
docs: Compare two strings with a sliding window method based on window_length and curse_forward values
          :param string_a: str
          :param string_b: str
          :param window_length: int
          :param curse_forward: int
          :return: list [[Comparison]]