Drop support for python 3.7

Python 3.7 went end-of-life on June 27th 2023. See https://endoflife.date/python.

There is not a Python 3.7 for arm64 using the macos-latest runner for light-the-torch tests.yml workflow.

.github/actions/setup-dev-env/action.yml

@@ -3,7 +3,7 @@ description: "Setup development environment"
 
 inputs:
   python-version:
-    default: "3.7"
+    default: "3.8"
 
 runs:
   using: composite

.github/workflows/tests.yml

@@ -31,7 +31,6 @@ jobs:
           - windows-latest
           - macos-latest
         python-version:
-          - "3.7"
           - "3.8"
           - "3.9"
           - "3.10"

light_the_torch/_utils.py

@@ -8,7 +8,7 @@
 
 from pip._vendor.packaging.requirements import Requirement
 
-from ._compat import importlib_metadata
+import importlib.metadata as importlib_metadata
 
 
 class UnexpectedInternalError(Exception):

pyproject.toml

@@ -26,18 +26,16 @@ classifiers = [
     "Environment :: GPU :: NVIDIA CUDA",
     "Intended Audience :: Developers",
     "License :: OSI Approved :: BSD License",
-    "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Topic :: System :: Installation/Setup",
     "Topic :: Utilities",
 ]
-requires-python = ">= 3.7"
+requires-python = ">= 3.8"
 dependencies = [
     "pip >=22.3, <23.3",
-    "importlib_metadata ; python_version < '3.8'",
 ]
 dynamic = ["version"]
 

scripts/check_pytorch_package_indices.py

@@ -23,7 +23,6 @@
     "torchrec",
     "torchrec-cpu",
     "torchrec_nightly",
-    "torchrec_nightly_3.7_cu11.whl",
     "torchrec_nightly_3.8_cu11.whl",
     "torchrec_nightly_3.9_cu11.whl",
     "torchrec_nightly_cpu",