input: from typing import List, Any
  
  def fix_syntax_errors(code_snippet: str) -> str:
      """Given a Python code snippet, detect and fix any syntax errors. If a variable
      is used without being defined, wrap the usage in a try-except block to handle
      the NameError exception and print an appropriate error message.
      
      >>> 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")'
      """
      return code_snippet.replace("def test ():", "def test():").replace("z", 'try:\n        z\nexcept NameError:\n        print("NameError: Name \\'z\\' is not defined")', 1)
output:     
      lines = code_snippet.split('\n')
      fixed_lines = []
      for line in lines:
          if '=' not in line and not line.strip().startswith('#'):
              fixed_lines.append(f'try:\n    {line}\nexcept NameError:\n    print("NameError: Name \\'{line.split()[0]}\\' is not defined")')
          else:
              fixed_lines.append(line)
      return '\n'.join(fixed_lines)
  