import _winreg, thread, time

root = _winreg.HKEY_CURRENT_USER
key = _winreg.CreateKey(root, 'PythonTestKeys')
name = '1'*256
_winreg.SetValue(key, name, _winreg.REG_SZ, '1')

try:
       num_subkeys, num_values, t = _winreg.QueryInfoKey(key)
       for i in range(num_subkeys):
              name = _winreg.EnumKey(key, i)
finally:
       # cleanup
       try:
              key = _winreg.DeleteKey(root, 'PythonTestKeys\\' + name)
              key = _winreg.DeleteKey(root, 'PythonTestKeys')
       except:
              pass