Enable deploying stack with concrete python version

Author: Michal Ploski

.github/workflows/run-e2e-tests.yml

@@ -16,17 +16,20 @@ jobs:
     permissions:
       id-token: write # needed to interact with GitHub's OIDC Token endpoint.
       contents: read
+    strategy:
+      matrix:
+        version: ["3.8", "3.9", "3.10"]
     steps:
       - name: "Checkout"
         uses: actions/checkout@v3
       #########################
       # Release new version
       #########################
-      - name: "Use Python 3"
+      - name: "Use Python"
         uses: actions/setup-python@v3
         with:
-          python-version: "3.x" # Version range or exact version of a Python version to use, using SemVer's version range syntax
-          architecture: "x64" # optional x64 or x86. Defaults to x64 if not specified
+          python-version: ${{ matrix.version }}
+          architecture: "x64"
       - name: Install dependencies
         run: make dev
       - name: Configure AWS credentials

tests/e2e/utils/infrastructure.py

@@ -1,13 +1,23 @@
 import io
 import os
+import sys
 import zipfile
+from enum import Enum
 from pathlib import Path
 
 import boto3
 import yaml
 from aws_cdk import App, CfnOutput, RemovalPolicy, Stack, aws_lambda_python_alpha, aws_logs
 from aws_cdk.aws_lambda import Code, Function, Runtime, Tracing
 
+PYTHON_RUNTIME_VERSION = f"V{''.join(map(str, sys.version_info[:2]))}"
+
+
+class PythonVersion(Enum):
+    V37 = Runtime.PYTHON_3_7
+    V38 = Runtime.PYTHON_3_8
+    V39 = Runtime.PYTHON_3_9
+
 
 class Infrastructure:
     def __init__(self, stack_name: str, handlers_dir: str, config: dict, environment_variables: dict) -> None:
@@ -63,7 +73,7 @@ def _prepare_stack(self, handlers, handlers_dir, stack_name, environment_variabl
             "aws-lambda-powertools",
             layer_version_name="aws-lambda-powertools",
             entry=".",
-            compatible_runtimes=[Runtime.PYTHON_3_9],
+            compatible_runtimes=[PythonVersion[PYTHON_RUNTIME_VERSION].value],
         )
         code = Code.from_asset(handlers_dir)
 
@@ -72,7 +82,7 @@ def _prepare_stack(self, handlers, handlers_dir, stack_name, environment_variabl
             function_python = Function(
                 stack,
                 f"{filename}-lambda",
-                runtime=Runtime.PYTHON_3_9,
+                runtime=PythonVersion[PYTHON_RUNTIME_VERSION].value,
                 code=code,
                 handler=f"{filename}.lambda_handler",
                 layers=[powertools_layer],