drop support for Python 2.x as it is very much EOL

A follow-up to b96a5ad562deffa697d966c29546650aae645f48 where we stopped
having CI run tests on Python 2.x. This actually drops the few remaining
Python 2.x compatibility bits as Python 2.x has EOL'd a long time ago.

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>

1 files changed, 14 insertions, 26 deletions

diff --git a/README.rst b/README.rst
index a3469f5..8d31730 100644
--- a/README.rst
+++ b/README.rst
@@ -33,7 +33,7 @@ Overview
 
 Kconfiglib is a `Kconfig
 <https://github.com/torvalds/linux/blob/master/Documentation/kbuild/kconfig-language.rst>`__
-implementation in Python 2/3. It started out as a helper library, but now has a
+implementation in Python 3. It started out as a helper library, but now has a
 enough functionality to also work well as a standalone Kconfig implementation
 (including `terminal and GUI menuconfig interfaces <Menuconfig interfaces_>`_
 and `Kconfig extensions`_).
@@ -121,9 +121,7 @@ available in the C tools.
 the configuration and (optionally) information that can be used to rebuild only
 files that reference Kconfig symbols that have changed value.
 
-Starting with Kconfiglib version 12.2.0, all utilities are compatible with both
-Python 2 and Python 3. Previously, ``menuconfig.py`` only ran under Python 3
-(i.e., it's now more backwards compatible than before).
+All utilities run under Python 3.
 
 **Note:** If you install Kconfiglib with ``pip``'s ``--user`` flag, make sure
 that your ``PATH`` includes the directory where the executables end up. You can
@@ -164,18 +162,13 @@ Installation for the Linux kernel
 
 See the module docstring at the top of `kconfiglib.py <https://github.com/zephyrproject-rtos/Kconfiglib/blob/master/kconfiglib.py>`_.
 
-Python version compatibility (2.7/3.2+)
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Python version compatibility
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Kconfiglib and all utilities run under both Python 2.7 and Python 3.2 and
-later. The code mostly uses basic Python features and has no third-party
-dependencies, so keeping it backwards-compatible is pretty low effort.
+Kconfiglib and all utilities run under Python 3.9 and later. The code mostly
+uses basic Python features and has no third-party dependencies.
 
-The 3.2 requirement comes from ``argparse``. ``format()`` with unnumbered
-``{}`` is used as well.
-
-A recent Python 3 version is recommended if you have a choice, as it'll give
-you better Unicode handling.
+A recent Python 3 version is recommended for better Unicode handling.
 
 Getting started
 ---------------
@@ -502,9 +495,9 @@ Other features
 
 - **Windows support**
 
-  Nothing Linux-specific is used. Universal newlines mode is used for both
-  Python 2 and Python 3.
-  
+  Nothing Linux-specific is used. Universal newlines mode is used for
+  interoperability between Linux and Windows.
+
   The `Zephyr <https://www.zephyrproject.org/>`_ project uses Kconfiglib to
   generate ``.config`` files and C headers on Linux as well as Windows.
 
@@ -562,16 +555,15 @@ Three configuration interfaces are currently available:
   the terminal menuconfig. Only this mode distinguishes between symbols defined
   with ``config`` and symbols defined with ``menuconfig``.
 
-  ``guiconfig.py`` has been tested on X11, Windows, and macOS, and is
-  compatible with both Python 2 and Python 3.
+  ``guiconfig.py`` has been tested on X11, Windows, and macOS.
 
   Despite being part of the Python standard library, ``tkinter`` often isn't
   included by default in Python installations on Linux. These commands will
   install it on a few different distributions:
 
-  - Ubuntu: ``sudo apt install python-tk``/``sudo apt install python3-tk``
+  - Ubuntu: ``sudo apt install python3-tk``
 
-  - Fedora: ``dnf install python2-tkinter``/``dnf install python3-tkinter``
+  - Fedora: ``dnf install python3-tkinter``
 
   - Arch: ``sudo pacman -S tk``
 
@@ -591,10 +583,6 @@ Three configuration interfaces are currently available:
   I did my best with the images, but some are definitely only art adjacent.
   Touch-ups are welcome. :)
 
-- `pymenuconfig <https://github.com/RomaVis/pymenuconfig>`_, built by `RomaVis
-  <https://github.com/RomaVis>`_, is an older portable Python 2/3 TkInter
-  menuconfig implementation.
-
   Screenshot below:
 
   .. image:: https://raw.githubusercontent.com/RomaVis/pymenuconfig/master/screenshot.PNG
@@ -784,7 +772,7 @@ configurations generated by the C tools, for a number of cases. See
 for the available options.
 
 The `tests/reltest <https://github.com/zephyrproject-rtos/Kconfiglib/blob/master/tests/reltest>`_ script runs the test suite
-and all the example scripts for both Python 2 and Python 3, verifying that everything works.
+and all the example scripts, verifying that everything works.
 
 Rarely, the output from the C tools is changed slightly (most recently due to a
 `change <https://www.spinics.net/lists/linux-kbuild/msg17074.html>`_ I added).