chore(ci): drop support for Python 3.8

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -58,7 +58,6 @@ body:
     attributes:
       label: AWS Lambda function runtime
       options:
-        - "3.8"
         - "3.9"
         - "3.10"
         - "3.11"

.github/ISSUE_TEMPLATE/static_typing.yml

@@ -25,7 +25,6 @@ body:
     attributes:
       label: AWS Lambda function runtime
       options:
-        - "3.8"
         - "3.9"
         - "3.10"
         - "3.11"

.github/workflows/layer_govcloud.yml

@@ -48,7 +48,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python38
           - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
@@ -94,7 +93,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python38
           - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
@@ -163,7 +161,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python38
           - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311

.github/workflows/layer_govcloud_verify.yml

@@ -28,7 +28,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python38
           - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
@@ -59,7 +58,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python38
           - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311
@@ -91,7 +89,6 @@ jobs:
     strategy:
       matrix:
         layer:
-          - AWSLambdaPowertoolsPythonV3-python38
           - AWSLambdaPowertoolsPythonV3-python39
           - AWSLambdaPowertoolsPythonV3-python310
           - AWSLambdaPowertoolsPythonV3-python311

.github/workflows/publish_v3_layer.yml

@@ -2,7 +2,7 @@ name: Deploy v3 layer to all regions
 
 # PROCESS
 #
-# 1. Compile Layer using cdk-aws-lambda-powertools-layer CDK construct for Python3.8-3.12 and x86_64/ARM architectures (uses custom runner as it's CPU heavy)
+# 1. Compile Layer using cdk-aws-lambda-powertools-layer CDK construct for Python3.9-3.13 and x86_64/ARM architectures (uses custom runner as it's CPU heavy)
 # 2. Kick off pipeline for beta, prod, and canary releases
 # 3. Create PR to update trunk so staged docs also point to the latest Layer ARN, when merged
 # 4. Builds and publishes docs with latest Layer ARN using given version (generally coming from release)
@@ -85,7 +85,7 @@ jobs:
     strategy:
       max-parallel: 5
       matrix:
-        python-version: ["3.8","3.9","3.10","3.11","3.12","3.13"]
+        python-version: ["3.9","3.10","3.11","3.12","3.13"]
     defaults:
       run:
         working-directory: ./layer_v3

.github/workflows/quality_check.yml

@@ -46,7 +46,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: ["3.8","3.9","3.10","3.11","3.12","3.13"]
+        python-version: ["3.9","3.10","3.11","3.12","3.13"]
     env:
       PYTHON: "${{ matrix.python-version }}"
     permissions:

.github/workflows/reusable_deploy_v3_layer_stack.yml

@@ -3,7 +3,7 @@ name: Deploy CDK Layer v3 stack
 # PROCESS
 #
 # 1. Split what AWS regions support ARM vs regions that Lambda support ARM
-# 2. We build the Lambda layer for 3.8 to 3.12 Python runtime and both x86_64 and arm64 (see `matrix` section)
+# 2. We build the Lambda layer for 3.9 to 3.13 Python runtime and both x86_64 and arm64 (see `matrix` section)
 # 3. Deploy previously built layer for each AWS commercial region
 # 4. Export all published Layers as JSON
 # 5. Deploy Canaries to every deployed region to test whether Powertools can be imported etc.
@@ -78,7 +78,7 @@ jobs:
                  "eu-north-1", "eu-south-1", "eu-south-2", "eu-west-1", "eu-west-2", "eu-west-3",
                  "il-central-1", "me-central-1", "me-south-1", "sa-east-1", "us-east-1",
                  "us-east-2", "us-west-1", "us-west-2"]
-        python-version: ["3.8","3.9","3.10","3.11","3.12","3.13"]
+        python-version: ["3.9","3.10","3.11","3.12","3.13"]
         include:
           - region: "af-south-1"
             has_arm64_support: "true"

.github/workflows/reusable_deploy_v3_sar.yml

@@ -4,7 +4,7 @@ name: Deploy V3 SAR
 #
 # 1. This workflow starts after the layer artifact is produced on `publish_v3_layer`
 # 2. We use the same layer artifact to ensure the SAR app is consistent with the published Lambda Layer
-# 3. We publish the SAR for 3.8 to 3.13 Python runtime and both x86_64 and arm64 (see `matrix` section)
+# 3. We publish the SAR for 3.9 to 3.13 Python runtime and both x86_64 and arm64 (see `matrix` section)
 # 4. We use `sam package` and `sam publish` to publish the SAR app
 # 5. We remove the previous Canary stack (if present) and deploy a new one to test the SAR App. We retain the Canary in the account for debugging purposes
 # 6. Finally the published SAR app is made public on the PROD environment
@@ -72,7 +72,7 @@ jobs:
     strategy:
       matrix:
         architecture: ["x86_64", "arm64"]
-        python-version: ["3.8","3.9","3.10","3.11","3.12","3.13"]
+        python-version: ["3.9","3.10","3.11","3.12","3.13"]
     steps:
       - name: checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2

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

@@ -48,7 +48,7 @@ jobs:
     strategy:
       fail-fast: false # needed so if a version fails, the others will still be able to complete and cleanup
       matrix:
-        version: ["3.8", "3.9", "3.10", "3.11", "3.12","3.13"]
+        version: ["3.9", "3.10", "3.11", "3.12","3.13"]
     if: ${{ github.actor != 'dependabot[bot]' && github.repository == 'aws-powertools/powertools-lambda-python' }}
     steps:
       - name: "Checkout"

.github/workflows/update_ssm.yml

@@ -11,7 +11,7 @@ run-name: SSM Parameters - Python
 # * layer_version: this is sequential layer version from the ARN
 #
 # A successful parameter would look similar to:
-#   /aws/service/powertools/python/arm64/python3.8/3.1.0
+#   /aws/service/powertools/python/arm64/python3.13/3.1.0
 # And will have a value of:
 #   arn:aws:lambda:eu-west-1:017000801446:layer:AWSLambdaPowertoolsPythonV3-python38-arm64:4
 
@@ -75,14 +75,12 @@ jobs:
         env:
           prefix: ${{ inputs.environment == 'beta' && '/aws/service/powertools/beta' || '/aws/service/powertools' }}
         run: |
-          aws ssm put-parameter --name ${{ env.prefix }}/python/arm64/python3.8/${{ inputs.package_version }} --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python38-arm64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/arm64/python3.9/${{ inputs.package_version }} --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python39-arm64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/arm64/python3.10/${{ inputs.package_version }} --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python310-arm64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/arm64/python3.11/${{ inputs.package_version }} --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python311-arm64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/arm64/python3.12/${{ inputs.package_version }} --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python312-arm64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/arm64/python3.13/${{ inputs.package_version }} --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python313-arm64:${{ inputs.layer_version }}" --type String --overwrite
 
-          aws ssm put-parameter --name ${{ env.prefix }}/python/x86_64/python3.8/${{ inputs.package_version }} --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python38-x86_64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/x86_64/python3.9/${{ inputs.package_version }} --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python39-x86_64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/x86_64/python3.10/${{ inputs.package_version }} --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python310-x86_64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/x86_64/python3.11/${{ inputs.package_version }} --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python311-x86_64:${{ inputs.layer_version }}" --type String --overwrite
@@ -94,14 +92,12 @@ jobs:
         env:
           prefix: ${{ inputs.environment == 'beta' && '/aws/service/powertools/beta' || '/aws/service/powertools' }}
         run: |
-          aws ssm put-parameter --name ${{ env.prefix }}/python/arm64/python3.8/latest --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python38-arm64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/arm64/python3.9/latest --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python39-arm64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/arm64/python3.10/latest --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python310-arm64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/arm64/python3.11/latest --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python311-arm64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/arm64/python3.12/latest --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python312-arm64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/arm64/python3.13/latest --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python313-arm64:${{ inputs.layer_version }}" --type String --overwrite
 
-          aws ssm put-parameter --name ${{ env.prefix }}/python/x86_64/python3.8/latest --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python38-x86_64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/x86_64/python3.9/latest --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python39-x86_64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/x86_64/python3.10/latest --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python310-x86_64:${{ inputs.layer_version }}" --type String --overwrite
           aws ssm put-parameter --name ${{ env.prefix }}/python/x86_64/python3.11/latest --value "arn:aws:lambda:${{ matrix.region }}:017000801446:layer:AWSLambdaPowertoolsPythonV3-python311-x86_64:${{ inputs.layer_version }}" --type String --overwrite

aws_lambda_powertools/utilities/idempotency/serialization/functions.py

@@ -5,7 +5,7 @@
 if sys.version_info >= (3, 10):
     from types import UnionType  # Available in Python 3.10+
 else:
-    UnionType = Union  # Fallback for Python 3.8 and 3.9
+    UnionType = Union  # Fallback for Python 3.9
 
 from aws_lambda_powertools.utilities.idempotency.exceptions import (
     IdempotencyModelTypeError,

benchmark/template.yaml

@@ -4,7 +4,7 @@ Transform: AWS::Serverless-2016-10-31
 Globals:
   Function:
     Handler: main.handler
-    Runtime: python3.8
+    Runtime: python3.13
     MemorySize: 128
     Tracing: Active
     Environment:

docs/automation.md

@@ -94,7 +94,7 @@ This is a snapshot of our automated checks at a glance.
 To build and deploy the Lambda Layers, we run a pipeline with the following steps:
 
 * We fetch the latest PyPi release and use it as the source for our layer.
-* We build Python versions ranging from **3.8 to 3.13** for x86_64 and arm64 architectures. This is necessary because we use pre-compiled libraries like **Pydantic** and **Cryptography**, which require specific Python versions for each layer.
+* We build Python versions ranging from **3.9 to 3.13** for x86_64 and arm64 architectures. This is necessary because we use pre-compiled libraries like **Pydantic** and **Cryptography**, which require specific Python versions for each layer.
 * We provide layer distributions for both the **x86_64** and **arm64** architectures.
 * For each Python version, we create a single CDK package containing both x86_64 and arm64 assets to optimize deployment performance.
 
@@ -106,17 +106,13 @@ Next, we deploy these CDK Assets to the beta account across all AWS regions. Onc
 
 ```mermaid
 graph LR
-    Fetch[Fetch PyPi release] --> P38[<strong>Python 3.8</strong>]
-    Fetch --> P39[<strong>Python 3.9</strong>]
+    Fetch[Fetch PyPi release] --> P39[<strong>Python 3.9</strong>]
     Fetch --> P310[<strong>Python 3.10</strong>]
     Fetch --> P311[<strong>Python 3.11</strong>]
     Fetch --> P312[<strong>Python 3.12</strong>]
     Fetch --> P313[<strong>Python 3.13</strong>]
 
     subgraph build ["LAYER BUILD"]
-      P38 --> P38x86[build x86_64]
-      P38 --> P38arm64[build arm64]
-
       P39 --> P39x86[build x86_64]
       P39 --> P39arm64[build arm64]
       P310 --> P310x86[build x86_64]
@@ -127,8 +123,6 @@ graph LR
       P312 --> P312arm64[build arm64]
       P313 --> P313x86[build x86_64]
       P313 --> P313arm64[build arm64]
-      P38x86 --> CDKP1[CDK Package]
-      P38arm64 --> CDKP1[CDK Package]
       P39x86 --> CDKP2[CDK Package]
       P39arm64 --> CDKP2[CDK Package]
       P310x86 --> CDKP3[CDK Package]
@@ -142,7 +136,6 @@ graph LR
     end
 
     subgraph beta ["BETA (all regions)"]
-      CDKP1 --> DeployBeta[Deploy to Beta]
       CDKP2 --> DeployBeta
       CDKP3 --> DeployBeta
       CDKP4 --> DeployBeta

docs/contributing/setup.md

@@ -25,7 +25,7 @@ graph LR
 Unless you're using the pre-configured Cloud environment, you'll need the following installed:
 
 * [GitHub account](https://github.com/join){target="_blank" rel="nofollow"}. You'll need to be able to fork, clone, and contribute via pull request.
-* [Python 3.8+](https://www.python.org/downloads/){target="_blank" rel="nofollow"}. Pick any version supported in [AWS Lambda runtime](https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html).
+* [Python 3.9+](https://www.python.org/downloads/){target="_blank" rel="nofollow"}. Pick any version supported in [AWS Lambda runtime](https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html).
 * [Docker](https://docs.docker.com/engine/install/){target="_blank" rel="nofollow"}. We use it to run documentation linters and non-Python tooling.
 * [Fork the repository](https://github.com/aws-powertools/powertools-lambda-python/fork). You'll work against your fork of this repository.