Code from Telegraph article

code.py

from typing import final

class Report:
  def generate_header(self):
    return "--- Company Header ---"

  @final
  def build_report(self) -> str:
    # Бу методнинг логикаси ўзгармас бўлиши керак
    header = self.generate_header()
    body = "This is the main content."
    return f"{header}\n{body}"

class FinancialReport(Report):
  # Оддий методни қайта ёзиш мумкин
  def generate_header(self):
    return "--- Financial Report Header ---"

  # @final методни қайта ёзишга уриниш
  def build_report(self) -> str: # <-- MyPy хато беради!
    return "Oops, I broke the logic."