What’s New In Python 3.11¶
- Release
3.11.0a0
- Date
czerwca 17, 2021
This article explains the new features in Python 3.11, compared to 3.10.
For full details, see the changelog.
Informacja
Prerelease users should be aware that this document is currently in draft form. It will be updated substantially as Python 3.11 moves towards release, so it’s worth checking back even after reading earlier versions.
Summary – Release highlights¶
New Features¶
Other Language Changes¶
New Modules¶
None yet.
Improved Modules¶
fractions¶
Support PEP 515-style initialization of Fraction
from
string. (Contributed by Sergey B Kirpichev in bpo-44258.)
math¶
Add
math.cbrt()
: return the cube root of x. (Contributed by Ajith Ramachandran in bpo-44357.)The behaviour of two
math.pow()
corner cases was changed, for consistency with the IEEE 754 specification. The operationsmath.pow(0.0, -math.inf)
andmath.pow(-0.0, -math.inf)
now returninf
. Previously they raisedValueError
. (Contributed by Mark Dickinson in bpo-44339.)
Removed¶
smtpd.MailmanProxy
is now removed as it is unusable without an external module,mailman
. (Contributed by Dong-hee Na in bpo-35800.)
Optimizations¶
Compiler now optimizes simple C-style formatting with literal format containing only format codes
%s
,%r
and%a
and makes it as fast as corresponding f-string expression. (Contributed by Serhiy Storchaka in bpo-28307.)„Zero-cost” exceptions are implemented. The cost of
try
statements is almost eliminated when no exception is raised. (Contributed by Mark Shannon in bpo-40222.)Method calls with keywords are now faster due to bytecode changes which avoid creating bound method instances. Previously, this optimization was applied only to method calls with purely positional arguments. (Contributed by Ken Jin and Mark Shannon in bpo-26110, based on ideas implemented in PyPy.)
CPython bytecode changes¶
Added a new
CALL_METHOD_KW
opcode. Calls a method in a similar fashion asCALL_METHOD
, but also supports keyword arguments. Works in tandem withLOAD_METHOD
.
Build Changes¶
Deprecated¶
Removed¶
Porting to Python 3.11¶
This section lists previously described changes and other bugfixes that may require changes to your code.
C API Changes¶
New Features¶
Porting to Python 3.11¶
The
PyType_Ready()
function now raises an error if a type is defined with thePy_TPFLAGS_HAVE_GC
flag set but has no traverse function (PyTypeObject.tp_traverse
). (Contributed by Victor Stinner in bpo-44263.)
Deprecated¶
Removed¶
PyFrame_BlockSetup()
andPyFrame_BlockPop()
have been removed. (Contributed by Mark Shannon in bpo-40222.)Deprecate the following functions to configure the Python initialization:
PySys_HasWarnOptions()
_Py_SetProgramFullPath()
Use the new
PyConfig
API of the Python Initialization Configuration instead (PEP 587). (Contributed by Victor Stinner in bpo-44113.)The following deprecated functions and methods are removed in the
gettext
module:lgettext()
,ldgettext()
,lngettext()
andldngettext()
.Function
bind_textdomain_codeset()
, methodsoutput_charset()
andset_output_charset()
, and the codeset parameter of functionstranslation()
andinstall()
are also removed, since they are only used for thel*gettext()
functions. (Contributed by Dong-hee Na and Serhiy Storchaka in bpo-44235.)