एक बेहतर BetterDate क्लास बनाना

class BetterDate:
  def __init__(self, year, month, day):
    self.year, self.month, self.day = year, month, day
    
  # Define a class method from_str
  ____
  ____
    # Split the string at "-"
    parts = datestr.____("____")
    year, month, day = int(parts[0]), int(parts[1]), int(parts[2])
    # Return the class instance
    ____ ____(____, ____, ____)

# Create the xmas object      
xmas = ____.____("____")   
print(xmas.year)
print(xmas.month)
print(xmas.day)