diff options
Diffstat (limited to 'Misc/NEWS')
| -rw-r--r-- | Misc/NEWS | 21 |
1 files changed, 16 insertions, 5 deletions
@@ -39,6 +39,13 @@ Type/class unification and new-style classes Core and builtins +- -Qnew now works as documented in PEP 238: when -Qnew is passed on + the command line, all occurrences of "/" use true division instead + of classic division. See the PEP for details. Note that "all" + means all instances in library and 3rd-party modules, as well as in + your own code. As the PEP says, -Qnew is intended for use only in + educational environments with control over the libraries in use. + Extension modules - gc.get_referents was renamed to gc.get_referrers. @@ -712,11 +719,15 @@ Core warnings are issued. Using -Qwarn issues a run-time warning about all uses of classic division for int and long arguments; -Qwarnall also warns about classic division for float and complex arguments - (for use with fixdiv.py). Using -Qnew is questionable; it turns on - new division by default, but only in the __main__ module. You can - usefully combine -Qwarn or -Qwarnall and -Qnew: this gives the - __main__ module new division, and warns about classic division - everywhere else. + (for use with fixdiv.py). + [Note: the remainder of this paragraph (preserved below) became + obsolete in 2.2c1 -- -Qnew has global effect in 2.2] + <obsolete> + Using -Qnew is questionable; it turns on new division by default, but + only in the __main__ module. You can usefully combine -Qwarn or + -Qwarnall and -Qnew: this gives the __main__ module new division, and + warns about classic division everywhere else. + </obsolete> - Many built-in types can now be subclassed. This applies to int, long, float, str, unicode, and tuple. (The types complex, list and |