input: from typing import List
  
  
  def fix_syntax_errors(code_snippet: str) -> str:
      """ Detects and fixes 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:     lines = code_snippet.split('\n')
      fixed_lines = []
      for line in lines:
          if line.strip().endswith('\\n'):
              line = line.rstrip('\\n')
          if line.strip().endswith(':'):
              fixed_lines.append(line)
          else:
              fixed_lines.append(line + '\\n')
      fixed_code = '\\n'.join(fixed_lines)
      return fixed_code