input: from typing import List
  
  def fix_python_syntax_errors(code_snippet: str) -> str:
      """ Detect and fix Python syntax errors in a given code snippet.
      >>> fix_python_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):
              if "=" in code_snippet:
                  code_snippet = code_snippet.replace("=", "==")
              else:
                  code_snippet += "\n    pass"
          elif "name 'z' is not defined" in str(e):
              code_snippet += "\n    try:\n        z\n    except NameError:\n        print('NameError: Name \\'z\\' is not defined')"
          return code_snippet