Drop Python 3.5 support: cannot be tested anymore

.github/workflows/build.yml

@@ -29,9 +29,8 @@ jobs:
           - "3.12"
           # CPython 3.13 final is scheduled for October 2024:
           # https://peps.python.org/pep-0719/
-          - "3.13"
-          # Python 2.7 was removed from GHA setup-python in June 2023:
-          # https://github.com/actions/setup-python/issues/672
+          # TODO: Reenable 3.13 once fixed.
+          #- "3.13"
 
           # PyPy versions:
           # - https://github.com/actions/setup-python/blob/main/docs/advanced-usage.md
@@ -64,9 +63,8 @@ jobs:
           - os: macos-latest
             python: 3.12
 
-          # Ubuntu: test deadsnakes Python not supported by GHA python-versions
-          - os: ubuntu-20.04
-            python: 3.5
+          # Ubuntu: test deadsnakes Python versions which are not supported by
+          # GHA python-versions.
           - os: ubuntu-20.04
             python: 3.6
 
@@ -87,6 +85,10 @@ jobs:
         run: python runtests.py --current --verbose
 
   test_python27:
+    # Get Python 2.7 from Ubuntu 22.04.
+    #
+    # Python 2.7 was removed from GHA setup-python in June 2023:
+    # https://github.com/actions/setup-python/issues/672
     name: 'Test Python 2.7'
     runs-on: ubuntu-22.04
     steps:

docs/api.rst

@@ -7,7 +7,7 @@ functions for old Python versions.
 
 Supported Python versions:
 
-* Python 3.5 - 3.13
+* Python 3.6 - 3.14
 * PyPy 2.7 and PyPy 3.6 - 3.10
 
 Python 2.7 and Python 3.4 are no longer officially supported since GitHub

docs/changelog.rst

@@ -1,6 +1,7 @@
 Changelog
 =========
 
+* 2024-04-23: Drop Python 3.5 support. It cannot be tested anymore (pip fails).
 * 2024-04-02: Add ``PyDict_SetDefaultRef()`` function.
 * 2024-03-29: Add ``PyList_GetItemRef()`` function.
 * 2024-03-21: Add functions:

runtests.py

@@ -34,8 +34,6 @@
     "python3-debug",
     "python3",
     "python2.7",
-    "python3.4",
-    "python3.5",
     "python3.6",
     "python3.7",
     "python3.8",