diff options
Diffstat (limited to 'Misc/NEWS')
| -rw-r--r-- | Misc/NEWS | 17 |
1 files changed, 17 insertions, 0 deletions
@@ -57,6 +57,10 @@ Type/class unification and new-style classes Core and builtins +- A subtle change to the semantics of the built-in function intern(): + interned strings are no longer immortal. You must keep a reference + to the return value intern() around to get the benefit. + - Use of 'None' as a variable, argument or attribute name now issues a SyntaxWarning. In the future, None may become a keyword. @@ -514,6 +518,19 @@ Build C API +- The string object's layout has changed: the pointer member + ob_sinterned has been replaced by an int member ob_sstate. On some + platforms (e.g. most 64-bit systems) this may change the offset of + the ob_sval member, so as a precaution the API_VERSION has been + incremented. The apparently unused feature of "indirect interned + strings", supported by the ob_sinterned member, is gone. Interned + strings are now usually mortal; theres a new API, + PyString_InternImmortal() that creates immortal interned strings. + (The ob_sstate member can only take three values; however, while + making it a char saves a few bytes per string object on average, in + it also slowed things down a bit because ob_sval was no longer + aligned.) + - The Py_InitModule*() functions now accept NULL for the 'methods' argument. Modules without global functions are becoming more common now that factories can be types rather than functions. |