From c316d07cd8c64c59e9adc2ef3b55ca0593a941d0 Mon Sep 17 00:00:00 2001
From: Eriq Augustine <eriq.augustine@gmail.com>
Date: Sun, 17 Dec 2023 22:07:25 -0600
Subject: [PATCH] Lowered the Python version support to 3.8.

---
 .github/workflows/main.yml          | 4 ++++
 autograder/cli/util/extract-code.py | 3 ++-
 autograder/code.py                  | 6 ++++++
 requirements.txt                    | 1 +
 setup.py                            | 4 ++--
 5 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1a21cab5..47122c27 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -38,6 +38,10 @@ jobs:
         shell: bash
         run: pip3 install -U -r requirements.txt
 
+      - name: Check Python Version Compatibility
+        shell: bash
+        run: vermin --no-tips --no-parse-comments --exclude ast.unparse --target=3.8- --violations autograder
+
       - name: Run Tests
         shell: bash
         run: ./run_tests.py
diff --git a/autograder/cli/util/extract-code.py b/autograder/cli/util/extract-code.py
index 57c40bde..cebe58d0 100644
--- a/autograder/cli/util/extract-code.py
+++ b/autograder/cli/util/extract-code.py
@@ -17,7 +17,8 @@ def run(args):
 
 def _get_parser():
     parser = argparse.ArgumentParser(description =
-        "Pull the code from a file and output the sanitized version as if it was being graded.")
+        "Pull the code from a file and output the sanitized version as if it was being graded."
+        + " Requires Python >= 3.9.")
 
     parser.add_argument('path', metavar = 'PATH',
         action = 'store', type = str,
diff --git a/autograder/code.py b/autograder/code.py
index 07137a8c..85aa8f66 100644
--- a/autograder/code.py
+++ b/autograder/code.py
@@ -140,4 +140,10 @@ def sanitize_code(source_code):
     return module_ast
 
 def ast_to_source(module_ast):
+    """
+    Get code from an AST.
+    Note that this function requires Python 3.9 (greater than our declared Python version,
+    and should not be used in any core functionality.
+    """
+
     return ast.unparse(module_ast)
diff --git a/requirements.txt b/requirements.txt
index 76cf0aec..b73c23ca 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,3 +6,4 @@ platformdirs>=3.10.0
 build
 twine
 packaging>=21.3
+vermin
diff --git a/setup.py b/setup.py
index 0fd5c16d..4ea37ba1 100644
--- a/setup.py
+++ b/setup.py
@@ -30,7 +30,7 @@ def get_description():
     classifiers = [
         'Intended Audience :: Education',
         'License :: OSI Approved :: MIT License',
-        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.8',
     ],
 
     packages = setuptools.find_packages(
@@ -47,5 +47,5 @@ def get_description():
 
     license_files = (LICENSE_PATH, ),
 
-    python_requires = '>=3.10'
+    python_requires = '>=3.8'
 )