old_contents: #!/usr/bin/env python3
  
  import os
  from typing import Iterator
  
  URL_BASE = "https://github.com/TheAlgorithms/Python/blob/master"
  
  
  def good_file_paths(top_dir: str = ".") -> Iterator[str]:
      for dir_path, dir_names, filenames in os.walk(top_dir):
          dir_names[:] = [d for d in dir_names if d != "scripts" and d[0] not in "._"]
          for filename in filenames:
              if filename == "__init__.py":
                  continue
              if os.path.splitext(filename)[1] in (".py", ".ipynb"):
                  yield os.path.join(dir_path, filename).lstrip("./")
  
  
  def md_prefix(i):
      return f"{i * '  '}*" if i else "\n##"
  
  
  def print_path(old_path: str, new_path: str) -> str:
      old_parts = old_path.split(os.sep)
      for i, new_part in enumerate(new_path.split(os.sep)):
          if i + 1 > len(old_parts) or old_parts[i] != new_part:
              if new_part:
                  print(f"{md_prefix(i)} {new_part.replace('_', ' ').title()}")
      return new_path
  
  
  def print_directory_md(top_dir: str = ".") -> None:
      old_path = ""
      for filepath in sorted(good_file_paths()):
          filepath, filename = os.path.split(filepath)
          if filepath != old_path:
              old_path = print_path(old_path, filepath)
          indent = (filepath.count(os.sep) + 1) if filepath else 0
          url = "/".join((URL_BASE, filepath, filename)).replace(" ", "%20")
          filename = os.path.splitext(filename.replace("_", " ").title())[0]
          print(f"{md_prefix(indent)} [{filename}]({url})")
  
  
  if __name__ == "__main__":
      print_directory_md(".")
  
new_contents: #!/usr/bin/env python3
  
  import os
  from typing import Iterator
  
  URL_BASE = "https://github.com/TheAlgorithms/Python/blob/master"
  
  
  def good_file_paths(top_dir: str = ".") -> Iterator[str]:
      for dir_path, dir_names, filenames in os.walk(top_dir):
          dir_names[:] = [d for d in dir_names if d != "scripts" and d[0] not in "._"]
          for filename in filenames:
              if filename == "__init__.py":
                  continue
              if os.path.splitext(filename)[1] in (".py", ".ipynb"):
                  yield os.path.join(dir_path, filename).lstrip("./")
  
  
  def md_prefix(i):
      return f"{i * '  '}*" if i else "\n##"
  
  
  def print_path(old_path: str, new_path: str) -> str:
      old_parts = old_path.split(os.sep)
      for i, new_part in enumerate(new_path.split(os.sep)):
          if i + 1 > len(old_parts) or old_parts[i] != new_part:
              if new_part:
                  print(f"{md_prefix(i)} {new_part.replace('_', ' ').title()}")
      return new_path
  
  
  def print_directory_md(top_dir: str = ".") -> None:
      old_path = ""
      for filepath in sorted(good_file_paths(top_dir)):
          filepath, filename = os.path.split(filepath)
          if filepath != old_path:
              old_path = print_path(old_path, filepath)
          indent = (filepath.count(os.sep) + 1) if filepath else 0
          url = "/".join((URL_BASE, filepath, filename)).replace(" ", "%20")
          filename = os.path.splitext(filename.replace("_", " ").title())[0]
          print(f"{md_prefix(indent)} [{filename}]({url})")
  
  
  if __name__ == "__main__":
      print_directory_md(".")
  
subject: Update build_directory_md.py (#2066)