diff --git a/Doc/faq/programming.rst b/Doc/faq/programming.rst index 776bab1ed5b779..91d5dc98bc926a 100644 --- a/Doc/faq/programming.rst +++ b/Doc/faq/programming.rst @@ -1868,15 +1868,15 @@ object identity is assured. Generally, there are three circumstances where identity is guaranteed: 1) Assignments create new names but do not change object identity. After the -assignment ``new = old``, it is guaranteed that ``new is old``. + assignment ``new = old``, it is guaranteed that ``new is old``. 2) Putting an object in a container that stores object references does not -change object identity. After the list assignment ``s[0] = x``, it is -guaranteed that ``s[0] is x``. + change object identity. After the list assignment ``s[0] = x``, it is + guaranteed that ``s[0] is x``. 3) If an object is a singleton, it means that only one instance of that object -can exist. After the assignments ``a = None`` and ``b = None``, it is -guaranteed that ``a is b`` because ``None`` is a singleton. + can exist. After the assignments ``a = None`` and ``b = None``, it is + guaranteed that ``a is b`` because ``None`` is a singleton. In most other circumstances, identity tests are inadvisable and equality tests are preferred. In particular, identity tests should not be used to check