.. availability:: Windows.
-.. versionchanged:: 3.3
- Support any error handler.
-
.. versionchanged:: 3.2
Before 3.2, the *errors* argument was ignored; ``'replace'`` was always used
to encode, and ``'ignore'`` to decode.
+.. versionchanged:: 3.3
+ Support any error handler.
+
:mod:`encodings.utf_8_sig` --- UTF-8 codec with BOM signature
-------------------------------------------------------------
See also :func:`math.ulp`.
+ .. versionadded:: 3.9
+
.. versionchanged:: 3.12
Added the *steps* argument.
- .. versionadded:: 3.9
-
.. function:: perm(n, k=None)
Return the number of ways to choose *k* items from *n* items
>>> math.isnan(float('nan'))
True
+ .. versionadded:: 3.5
+
.. versionchanged:: 3.11
It is now always available.
- .. versionadded:: 3.5
-
.. impl-detail::
.. audit-event:: shutil.copytree src,dst shutil.copytree
- .. versionchanged:: 3.3
- Copy metadata when *symlinks* is false.
- Now returns *dst*.
-
.. versionchanged:: 3.2
Added the *copy_function* argument to be able to provide a custom copy
function.
Added the *ignore_dangling_symlinks* argument to silence dangling symlinks
errors when *symlinks* is false.
+ .. versionchanged:: 3.3
+ Copy metadata when *symlinks* is false.
+ Now returns *dst*.
+
.. versionchanged:: 3.8
Platform-specific fast-copy syscalls may be used internally in order to
copy the file more efficiently. See
On POSIX systems where Python was built with the standard ``configure``
script, this contains the ABI flags as specified by :pep:`3149`.
+ .. versionadded:: 3.2
+
.. versionchanged:: 3.8
Default flags became an empty string (``m`` flag for pymalloc has been
removed).
- .. versionadded:: 3.2
-
.. availability:: Unix.
the virtual environment.
- .. versionchanged:: 3.12
- The attribute ``lib_path`` was added to the context, and the context
- object was documented.
-
.. versionchanged:: 3.11
The *venv*
:ref:`sysconfig installation scheme <installation_paths>`
is used to construct the paths of the created directories.
+ .. versionchanged:: 3.12
+ The attribute ``lib_path`` was added to the context, and the context
+ object was documented.
+
.. method:: create_configuration(context)
Creates the ``pyvenv.cfg`` configuration file in the environment.
``Lib\site-packages``). If an existing directory is specified, it will be
re-used.
+.. versionchanged:: 3.5
+ The use of ``venv`` is now recommended for creating virtual environments.
+
.. deprecated:: 3.6
``pyvenv`` was the recommended tool for creating virtual environments for
Python 3.3 and 3.4, and is
:ref:`deprecated in Python 3.6 <whatsnew36-venv>`.
-.. versionchanged:: 3.5
- The use of ``venv`` is now recommended for creating virtual environments.
-
.. highlight:: none
On Windows, invoke the ``venv`` command as follows::