input: from typing import List
  
  
  class Song:
      """
      Represents a song with a title and artist. Includes methods for string representation, equality check, and length of the title.
      >>> song1 = Song("Bohemian Rhapsody", "Queen")
      >>> song2 = Song("Bohemian Rhapsody", "Queen")
      >>> print(song1)
      Title: Bohemian Rhapsody
      Artist: Queen
      >>> song1 == song2
      True
      >>> song1.length()
      17
      """
      def __init__(self, title, artist):
          self.title = title
          self.artist = artist
    
      def __str__(self):
          return f'Title: {self.title}\nArtist: {self.artist}'
      
      def __eq__(self, other):
          return self.artist == other.artist and self.title == other.title
  
      def length(self):
          return len(self.title)
output:     def __init__(self, title, artist):
          self.title = title
          self.artist = artist
    
      def __str__(self):
          return f'Title: {self.title}\nArtist: {self.artist}'
      
      def __eq__(self, other):
          return self.artist == other.artist and self.title == other.title
  
      def length(self):
          return len(self.title)