Discontinue SmartSim support for python 3.8

.github/workflows/release.yml

@@ -98,7 +98,7 @@ jobs:
       - uses: actions/setup-python@v5
         name: Install Python
         with:
-          python-version: '3.8'
+          python-version: '3.9'
 
       - name: Build sdist
         run: |

.github/workflows/run_tests.yml

@@ -57,12 +57,10 @@ jobs:
         os: [macos-12, macos-14, ubuntu-20.04] # Operating systems
         compiler: [8] # GNU compiler version
         rai: [1.2.7] # Redis AI versions
-        py_v: ["3.8", "3.9", "3.10", "3.11"] # Python versions
+        py_v: ["3.9", "3.10", "3.11"] # Python versions
         exclude:
           - os: macos-14
             py_v: "3.9"
-          - os: macos-14
-            py_v: "3.8"
 
     env:
       SMARTSIM_REDISAI: ${{ matrix.rai }}

doc/changelog.rst

@@ -18,6 +18,7 @@ To be released at some future point in time
 
 Description
 
+- Drop Python 3.8 support
 - Update watchdog dependency
 - Historical output files stored under .smartsim directory
 - Add option to build Torch backend without the Intel Math Kernel Library
@@ -39,6 +40,8 @@ Description
 
 Detailed Notes
 
+- Python 3.8 is reaching its end-of-life in October, 2024, so it will
+  no longer continue to be supported. (SmartSim-PR544_) 
 - Update watchdog dependency from 3.x to 4.x, fix new type issues (SmartSim-PR540_)
 - The dashboard needs to display historical logs, so log files are written
   out under the .smartsim directory and files under the experiment
@@ -95,6 +98,7 @@ Detailed Notes
   handler. SmartSim will now attempt to kill any launched jobs before calling
   the previously registered signal handler. (SmartSim-PR535_)
 
+.. _SmartSim-PR544: https://github.com/CrayLabs/SmartSim/pull/544
 .. _SmartSim-PR540: https://github.com/CrayLabs/SmartSim/pull/540
 .. _SmartSim-PR532: https://github.com/CrayLabs/SmartSim/pull/532
 .. _SmartSim-PR538: https://github.com/CrayLabs/SmartSim/pull/538

doc/installation_instructions/basic.rst

@@ -20,7 +20,7 @@ Basic
 
 The base prerequisites to install SmartSim and SmartRedis are:
 
-  - Python 3.8-3.11
+  - Python 3.9-3.11
   - Pip
   - Cmake 3.13.x (or later)
   - C compiler
@@ -74,11 +74,11 @@ Supported Versions
    * - MacOS
      - x86_64, aarch64
      - Not supported
-     - 3.8 - 3.11
+     - 3.9 - 3.11
    * - Linux
      - x86_64
      - Nvidia
-     - 3.8 - 3.11
+     - 3.9 - 3.11
 
 
 .. note::
@@ -256,9 +256,9 @@ SmartSim does.
    * - Platform
      - Python Versions
    * - MacOS
-     - 3.8 - 3.11
+     - 3.9 - 3.11
    * - Linux
-     - 3.8 - 3.11
+     - 3.9 - 3.11
 
 The Python client for SmartRedis is installed through ``pip`` as follows:
 

pyproject.toml

@@ -31,7 +31,7 @@ build-backend = "setuptools.build_meta"
 
 [tool.black]
 line-length = 88
-target-version = ['py38', 'py39', 'py310']
+target-version = ['py39', 'py310']
 exclude = '''
 (
   | \.egg

setup.cfg

@@ -42,7 +42,6 @@ contact_email = craylabs@hpe.com
 license = BSD 2-Clause License
 keywords = scientific, ai, workflow, hpc, analysis
 classifiers =
-    Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
@@ -56,7 +55,7 @@ setup_requires =
     setuptools>=39.2
     cmake>=3.13
 include_package_data = True
-python_requires = >=3.8,<3.12
+python_requires = >=3.9,<3.12
 
 [options.packages.find]
 include =

smartsim/__init__.py

@@ -30,8 +30,8 @@
 # pylint: disable-next=useless-import-alias
 from .version import __version__ as __version__
 
-if sys.version_info < (3, 8):  # pragma: no cover
-    sys.exit("Python 3.8 or greater must be used with SmartSim.")
+if sys.version_info < (3, 9):  # pragma: no cover
+    sys.exit("Python 3.9 or greater must be used with SmartSim.")
 
 # Main API module
 # pylint: disable=wrong-import-position

smartsim/_core/_install/buildenv.py

@@ -267,7 +267,7 @@ class Versioner:
     """
 
     # compatible Python version
-    PYTHON_MIN = Version_("3.8.0")
+    PYTHON_MIN = Version_("3.9.0")
 
     # Versions
     SMARTSIM = Version_(get_env("SMARTSIM_VERSION", "0.6.2"))

smartsim/_core/utils/helpers.py

@@ -312,11 +312,9 @@ def decode_cmd(encoded_cmd: str) -> t.List[str]:
     return cleaned_cmd
 
 
-# TODO: Remove the ``type: ignore`` comment here when Python 3.8 support is dropped
-#       ``collections.abc.Collection`` is not subscriptable until Python 3.9
 @t.final
-class SignalInterceptionStack(collections.abc.Collection):  # type: ignore[type-arg]
-    """Registers a stack of unique callables to be called when a signal is
+class SignalInterceptionStack(collections.abc.Collection[_TSignalHandlerFn]):
+    """Registers a stack of callables to be called when a signal is
     received before calling the original signal handler.
     """