diff options
Diffstat (limited to 'Doc/reference/expressions.rst')
| -rw-r--r-- | Doc/reference/expressions.rst | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst index af79e53..e205e42 100644 --- a/Doc/reference/expressions.rst +++ b/Doc/reference/expressions.rst @@ -1082,7 +1082,7 @@ The operator :keyword:`not in` is defined to have the inverse true value of The operators :keyword:`is` and :keyword:`is not` test for object identity: ``x is y`` is true if and only if *x* and *y* are the same object. ``x is not y`` -yields the inverse truth value. +yields the inverse truth value. [#]_ .. _booleans: @@ -1314,3 +1314,7 @@ groups from right to left). identity only, but this caused surprises because people expected to be able to test a dictionary for emptiness by comparing it to ``{}``. +.. [#] Due to automatic garbage-collection, free lists, and the dynamic nature of + descriptors, you may notice seemingly unusual behaviour in certain uses of + the :keyword:`is` operator, like those involving comparisons between instance + methods, or constants. Check their documentation for more info. |