old_contents: # coding: utf-8
  
  class PianoState:
  
      def __init__(self):
          self.notes_state = {
              "C3": False,
              "D3": False,
              "E3": False,
              "F3": False,
              "G3": False,
              "A4": False,
              "B♭4": False,
              "B4": False,
              "C": False,
              "C5": False,
              "D5": False,
              "E♭5": False,
              "E5": False,
              "F5": False,
              "G♭5": False,
              "G5": False,
              "A6": False,
              "B♭6": False,
              "B6": False,
          }
  
      def __str__(self):
          state_string = ""
  
          for note, cycles in self.notes_state.items():
              if (cycles > 0):
                  state_string += note + " "
  
          return state_string
  
      def get_notes_keys(self):
          return self.notes_state.keys()
  
      def raise_note(self, note):
          self.notes_state[note] = True
  
      def is_note_raised(self, note):
          return (self.notes_state[note] is True)
  
      def clear_note(self, note):
          self.notes_state[note] = False
  
      def is_note_cleared(self, note):
          return (self.notes_state[note] is False)
  
new_contents: # coding: utf-8
  
  class PianoState:
  
      def __init__(self):
          self.notes_state = {
              "C3": False,
              "D3": False,
              "E3": False,
              "F3": False,
              "G3": False,
              "A4": False,
              "B♭4": False,
              "B4": False,
              "C4": False,
              "C5": False,
              "D5": False,
              "E♭5": False,
              "E5": False,
              "F5": False,
              "G♭5": False,
              "G5": False,
              "A6": False,
              "B♭6": False,
              "B6": False,
          }
  
      def __str__(self):
          state_string = ""
  
          for note, cycles in self.notes_state.items():
              if (cycles > 0):
                  state_string += note + " "
  
          return state_string
  
      def get_notes_keys(self):
          return self.notes_state.keys()
  
      def raise_note(self, note):
          self.notes_state[note] = True
  
      def is_note_raised(self, note):
          return (self.notes_state[note] is True)
  
      def clear_note(self, note):
          self.notes_state[note] = False
  
      def is_note_cleared(self, note):
          return (self.notes_state[note] is False)
  
subject: fix bogus note name