input: from typing import List
  
  
  def fix_syntax_errors(code_snippet: str) -> str:
      """ Detect and fix Python syntax errors in a given code snippet.
      >>> fix_syntax_errors("def test ():\n    x = 5\n    y = 3\n    z")
      "def test():\n    x = 5\n    y = 3\n    try:\n        z\n    except NameError:\n        print("NameError: Name 'z' is not defined")"
      """
output:     try:
          compile(code_snippet, '<string>', 'exec')
          return code_snippet
      except SyntaxError as e:
          if "invalid syntax" in str(e):
              lines = code_snippet.split('\n')
              for i in range(len(lines)):
                  try:
                      compile(lines[i], '<string>', 'exec')
                  except SyntaxError:
                      lines[i] = f"try:\n    {lines[i]}\nexcept NameError:\n    print(\"NameError: Name 'z' is not defined\")"
                      break
              return '\n'.join(lines)
          return code_snippet