Update minimum Python version for Captum to 3.9

Summary:
Python 3.8 has reached EOL in Oct 2024, so we can upgrade minimum python required for Captum to 3.9.

We are seeing test failures due to dependencies when running with Python 3.8, so upgrading minimum version to resolve these.

Differential Revision: D67545940

.conda/meta.yaml

@@ -13,7 +13,7 @@ build:
 
 requirements:
   host:
-    - python>=3.8
+    - python>=3.9
   run:
     - numpy<2.0
     - pytorch>=1.10

.github/workflows/test-conda-cpu.yml

@@ -15,7 +15,7 @@ jobs:
   tests:
     strategy:
       matrix:
-        python_version: ["3.8", "3.9", "3.10", "3.11"]
+        python_version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
       fail-fast: false
     uses: pytorch/test-infra/.github/workflows/linux_job.yml@main
     with:

.github/workflows/test-pip-cpu.yml

@@ -14,7 +14,7 @@ jobs:
       matrix:
         pytorch_args: ["-v 1.10", "-v 1.11", "-v 1.12", "-v 1.13", "-v 2.0.0", "-v 2.1.0", "-v 2.2.0", "-v 2.3.0"]
         transformers_args: ["-t 4.38.0", "-t 4.39.0", "-t 4.41.0", "-t 4.43.0", "-t 4.45.2"]
-        docker_img: ["cimg/python:3.8", "cimg/python:3.9", "cimg/python:3.10", "cimg/python:3.11"]
+        docker_img: ["cimg/python:3.9", "cimg/python:3.10", "cimg/python:3.11", "cimg/python:3.12", "cimg/python:3.13"]
         exclude:
           - pytorch_args: "-v 1.10"
             docker_img: "cimg/python:3.10"

CONTRIBUTING.md

@@ -63,7 +63,7 @@ Then run this script from the repository root:
 ```
 Note that we expect mypy to have version 0.760 or higher, and when type checking, use PyTorch 1.4 or
 higher due to fixes to PyTorch type hints available in 1.4. We also use the Literal feature which is
-available only in Python 3.8 or above. If type-checking using a previous version of Python, you will
+available only in Python 3.9 or above. If type-checking using a previous version of Python, you will
 need to install the typing-extension package which can be done with pip using `pip install typing-extensions`.
 
 #### Unit Tests

README.md

@@ -47,7 +47,7 @@ Captum can also be used by application engineers who are using trained models in
 ## Installation
 
 **Installation Requirements**
-- Python >= 3.8
+- Python >= 3.9
 - PyTorch >= 1.10
 
 

setup.py

@@ -16,7 +16,7 @@
 from setuptools import find_packages, setup
 
 REQUIRED_MAJOR = 3
-REQUIRED_MINOR = 8
+REQUIRED_MINOR = 9
 
 # Check for python version
 if sys.version_info < (REQUIRED_MAJOR, REQUIRED_MINOR):
@@ -148,7 +148,7 @@ def get_package_files(root, subdirs):
         ],
         long_description=long_description,
         long_description_content_type="text/markdown",
-        python_requires=">=3.8",
+        python_requires=">=3.9",
         install_requires=[
             "matplotlib",
             "numpy<2.0",