Drop Python3.7 support (#287)

* bump from 3.7 to 3.8

* remove 3.13

* new timeouts for param server

* fix macos14 run

---------

Co-authored-by: Ritvik Rao <[email protected]>

Author: mayantaylor

.github/workflows/charm4py.yml

@@ -13,12 +13,12 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["3.7", "3.12"]
+        python-version: ["3.8", "3.12"]
         # macos-13 is x86_64, macos-14 is arm64
         os: [ubuntu-latest, macos-13, macos-14]
         exclude:
-          - os: macos-14  # Python 3.7 does not exist for macos-14
-            python-version: "3.7"
+          - os: ubuntu-latest # Python 3.8 not supported since ubuntu 24.04
+            python-version: "3.8"
       fail-fast: false
 
     steps:
@@ -40,15 +40,13 @@ jobs:
         run: |
           git clone https://github.com/charmplusplus/charm charm_src/charm
           export CHARM_EXTRA_BUILD_OPTS="--enable-error-checking"
-          export CHARM_BUILD_PROCESSES=2
+          export CHARM_BUILD_PROCESSES=8
           export CHARM4PY_BUILD_CFFI=1
           python setup.py build_ext --inplace
       - name: Run auto_test.py
         run: |
           export PYTHONPATH="$PWD"
           export CHARM4PY_TEST_NUM_PROCESSES=2
-          if [ ${{ matrix.os }} == 'macos-13' ]; then
-            # Crashes in ray test otherwise
-            export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES
-          fi
+          # needed for param server
+          export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES
           python auto_test.py

auto_test.py

@@ -59,6 +59,10 @@ def searchForPython(python_implementations):
             continue
         if test['condition'] == 'not numbaInstalled' and numbaInstalled:
             continue
+    if 'timeout_override' in test:
+        TIMEOUT = test['timeout_override']
+    else:
+        TIMEOUT = 120
     num_processes = max(test.get('force_min_processes', default_num_processes), default_num_processes)
     for interface in interfaces:
         durations[interface][test['path']] = []

charm4py/__init__.py

@@ -1,6 +1,6 @@
 import sys
-if sys.version_info < (3, 7, 0):
-    raise RuntimeError('Charm4py requires Python 3.7 or higher')
+if sys.version_info < (3, 8, 0):
+    raise RuntimeError('Charm4py requires Python 3.8 or higher')
 import atexit
 import os
 try:

charm4py/charm.py

@@ -547,8 +547,8 @@ def registerMainModule(self):
                        self.lib.name + "' interface to access Charm++")
             if py_impl != 'CPython':
                 raise Charm4PyError('PyPy is no longer supported. Use CPython instead')
-            if sys.version_info < (3,7,0):
-                raise Charm4PyError('Python 2 is no longer supported. Use Python 3.7 or above instead')
+            if sys.version_info < (3,8,0):
+                raise Charm4PyError('Python 2 is no longer supported. Use Python 3.8 or above instead')
             if self.options.profiling:
                 print('Charm4py> Profiling is ON (this affects performance)')
 

docs/install.rst

@@ -7,7 +7,7 @@ Install
 Charm4py runs on Linux, macOS, Windows, Raspberry Pi, and a wide variety of clusters and
 supercomputer environments (including many supercomputers in the TOP500).
 
-Charm4py runs on Python 3.7+. Charm4py supports the CPython Python implementation.
+Charm4py runs on Python 3.8+. Charm4py supports the CPython Python implementation.
 
 Installing Charm4Py binaries (via pip)
 ---------------------------------------

pyproject.toml

@@ -21,7 +21,7 @@ keywords = [
     "HPC",
     "runtime",
 ]
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 dependencies = ["numpy>=1.10.0", "greenlet>=3.0.0"]
 classifiers = [
     'Intended Audience :: Developers',

test_config.json

@@ -292,10 +292,12 @@
         "path": "examples/ray/simple.py"
     },
     {
+        "timeout_override": 480,
         "path": "examples/ray/parameter_server.py",
         "args": "sync"
     },
     {
+        "timeout_override": 480,
         "path": "examples/ray/parameter_server.py",
         "args": "async"
     },