Remove python 3.8 support

samcli/lib/build/workflow_config.py

@@ -85,7 +85,6 @@ def get_selector(
 
 def get_layer_subfolder(build_workflow: str) -> str:
     subfolders_by_runtime = {
-        "python3.8": "python",
         "python3.9": "python",
         "python3.10": "python",
         "python3.11": "python",
@@ -155,7 +154,6 @@ def get_workflow_config(
     }
 
     selectors_by_runtime = {
-        "python3.8": BasicWorkflowSelector(PYTHON_PIP_CONFIG),
         "python3.9": BasicWorkflowSelector(PYTHON_PIP_CONFIG),
         "python3.10": BasicWorkflowSelector(PYTHON_PIP_CONFIG),
         "python3.11": BasicWorkflowSelector(PYTHON_PIP_CONFIG),

samcli/lib/init/local_manifest.json

@@ -104,15 +104,5 @@
             "packageType": "Zip",
             "useCaseName": "Hello World Example"
         }
-    ],
-    "python3.8": [
-        {
-            "directory": "template/cookiecutter-aws-sam-hello-python",
-            "displayName": "Hello World Example",
-            "dependencyManager": "pip",
-            "appTemplate": "hello-world",
-            "packageType": "Zip",
-            "useCaseName": "Hello World Example"
-        }
     ]
 }

samcli/lib/init/templates/cookiecutter-aws-sam-hello-python/cookiecutter.json

@@ -1,6 +1,6 @@
 {
     "project_name": "Name of the project",
-    "runtime": "python3.8",
+    "runtime": "python3.9",
     "architectures": {
         "value": [
             "x86_64"

samcli/lib/utils/architecture.py

@@ -19,7 +19,6 @@
     "nodejs18.x": [ARM64, X86_64],
     "nodejs20.x": [ARM64, X86_64],
     "nodejs22.x": [ARM64, X86_64],
-    "python3.8": [ARM64, X86_64],
     "python3.9": [ARM64, X86_64],
     "python3.10": [ARM64, X86_64],
     "python3.11": [ARM64, X86_64],

samcli/local/common/runtime_template.py

@@ -16,7 +16,7 @@
 RUNTIME_DEP_TEMPLATE_MAPPING = {
     "python": [
         {
-            "runtimes": ["python3.13", "python3.12", "python3.11", "python3.10", "python3.9", "python3.8"],
+            "runtimes": ["python3.13", "python3.12", "python3.11", "python3.10", "python3.9"],
             "dependency_manager": "pip",
             "init_location": os.path.join(_templates, "cookiecutter-aws-sam-hello-python"),
             "build": True,
@@ -123,7 +123,6 @@ def get_local_lambda_images_location(mapping, runtime):
     "python3.11",
     "python3.10",
     "python3.9",
-    "python3.8",
     # ruby runtimes in descending order
     "ruby3.3",
     "ruby3.2",
@@ -149,7 +148,6 @@ def get_local_lambda_images_location(mapping, runtime):
     "python3.11": "amazon/python3.11-base",
     "python3.10": "amazon/python3.10-base",
     "python3.9": "amazon/python3.9-base",
-    "python3.8": "amazon/python3.8-base",
     "ruby3.3": "amazon/ruby3.3-base",
     "ruby3.2": "amazon/ruby3.2-base",
 }
@@ -164,7 +162,6 @@ def get_local_lambda_images_location(mapping, runtime):
     "java11": "Java8",
     "java17": "Java8",
     "java21": "Java8",
-    "python3.8": "Python36",
     "python3.9": "Python36",
     "python3.10": "Python36",
     "python3.11": "Python36",

samcli/local/docker/lambda_debug_settings.py

@@ -167,10 +167,6 @@ def get_debug_settings(debug_port, debug_args_list, _container_env_vars, runtime
                     **_container_env_vars,
                 },
             ),
-            Runtime.python38.value: lambda: DebugSettings(
-                entry + ["/var/lang/bin/python3.8"] + debug_args_list + ["/var/runtime/bootstrap.py"],
-                container_env_vars=_container_env_vars,
-            ),
             Runtime.python39.value: lambda: DebugSettings(
                 entry + ["/var/lang/bin/python3.9"] + debug_args_list + ["/var/runtime/bootstrap.py"],
                 container_env_vars=_container_env_vars,

samcli/local/docker/lambda_image.py

@@ -39,7 +39,6 @@ class Runtime(Enum):
     nodejs18x = "nodejs18.x"
     nodejs20x = "nodejs20.x"
     nodejs22x = "nodejs22.x"
-    python38 = "python3.8"
     python39 = "python3.9"
     python310 = "python3.10"
     python311 = "python3.11"

tests/functional/commands/validate/lib/models/api_http_with_default_iam_authorizer.yaml

@@ -4,7 +4,7 @@ Resources:
     Properties:
       CodeUri: s3://bucket/key
       Handler: app.lambda_handler
-      Runtime: python3.8
+      Runtime: python3.9
       Role:
         Fn::GetAtt:
         - HelloWorldFunctionRole

tests/functional/commands/validate/lib/models/api_merge_definitions_with_any_method.yaml

@@ -15,7 +15,7 @@ Resources:
     Properties:
       CodeUri: s3://bucket/key
       Handler: code/handler
-      Runtime: python3.8
+      Runtime: python3.9
       Events:
         AllEvent:
           Type: Api

tests/functional/commands/validate/lib/models/cognito_user_pool_with_new_property_and_cognito_event.yaml

@@ -8,7 +8,7 @@ Resources:
   MyFunction:
     Type: AWS::Serverless::Function
     Properties:
-      Runtime: python3.8
+      Runtime: python3.9
       InlineCode: foo
       Handler: bar
       Events:

tests/functional/commands/validate/lib/models/function_with_null_events.yaml

@@ -4,5 +4,5 @@ Resources:
     Properties:
       CodeUri: s3://sam-demo-bucket/queues.zip
       Handler: handlers.handler
-      Runtime: python3.8
+      Runtime: python3.9
       Events:

tests/functional/commands/validate/lib/models/function_with_runtime_config.yaml

@@ -12,24 +12,24 @@ Resources:
     Properties:
       CodeUri: s3://sam-demo-bucket/hello.zip
       Handler: hello.handler
-      Runtime: python3.8
+      Runtime: python3.9
       RuntimeManagementConfig:
         UpdateRuntimeOn: Auto
   MinimalFunctionWithManualRuntimeManagementConfig:
     Type: AWS::Serverless::Function
     Properties:
       CodeUri: s3://sam-demo-bucket/hello.zip
       Handler: hello.handler
-      Runtime: python3.8
+      Runtime: python3.9
       RuntimeManagementConfig:
         UpdateRuntimeOn: Manual
-        RuntimeVersionArn: !Sub arn:aws:lambda:${AWS::Region}::runtime:python3.8::0af1966588ced06e3143ae720245c9b7aeaae213c6921c12c742a166679cc505
+        RuntimeVersionArn: !Sub arn:aws:lambda:${AWS::Region}::runtime:python3.9::0af1966588ced06e3143ae720245c9b7aeaae213c6921c12c742a166679cc505
   FunctionWithRuntimeManagementConfigAndAlias:
     Type: AWS::Serverless::Function
     Properties:
       CodeUri: s3://sam-demo-bucket/hello.zip
       Handler: hello.handler
-      Runtime: python3.8
+      Runtime: python3.9
       AutoPublishAlias: live
       RuntimeManagementConfig:
         UpdateRuntimeOn: Auto
@@ -38,15 +38,15 @@ Resources:
     Properties:
       CodeUri: s3://sam-demo-bucket/hello.zip
       Handler: hello.handler
-      Runtime: python3.8
+      Runtime: python3.9
       RuntimeManagementConfig:
         UpdateRuntimeOn: !Ref RuntimeUpdateParam
   FunctionWithIntrinsicRuntimeVersion:
     Type: AWS::Serverless::Function
     Properties:
       CodeUri: s3://sam-demo-bucket/hello.zip
       Handler: hello.handler
-      Runtime: python3.8
+      Runtime: python3.9
       RuntimeManagementConfig:
         UpdateRuntimeOn: !Ref RuntimeUpdateParam
         RuntimeVersionArn: !Ref RuntimeVersionParam

tests/functional/commands/validate/lib/models/inline_precedence.yaml

@@ -7,4 +7,4 @@ Resources:
             pass"
       CodeUri: .
       Handler: index.lambda_handler
-      Runtime: python3.8
+      Runtime: python3.9

tests/functional/commands/validate/lib/models/managed_policies_minimal.yaml

@@ -2,7 +2,7 @@ Resources:
   MyFunction:
     Type: AWS::Serverless::Function
     Properties:
-      Runtime: python3.8
+      Runtime: python3.9
       Handler: foo
       InlineCode: bar
       Policies:

tests/functional/commands/validate/lib/models/schema_validation_4.yaml

@@ -59,7 +59,7 @@ Resources:
   OtherFunction:
     Type: AWS::Serverless::Function
     Properties:
-      Runtime: python3.8
+      Runtime: python3.9
       Handler: foo
       InlineCode: bar
       Environment:

tests/functional/commands/validate/lib/models/state_machine_with_api.yaml

@@ -12,7 +12,7 @@ Resources:
             print(event)
             return "do nothing"
       Handler: index.handler
-      Runtime: python3.8
+      Runtime: python3.9
   Post:
     Type: AWS::Serverless::StateMachine
     Properties:

tests/functional/commands/validate/lib/models/state_machine_with_sam_policy_templates.yaml

@@ -14,7 +14,7 @@ Resources:
     Properties:
       CodeUri: s3://sam-demo-bucket/resolver.zip
       Handler: resolver.handler
-      Runtime: python3.8
+      Runtime: python3.9
 
   NestedWorkflow:
     Type: AWS::Serverless::StateMachine

tests/functional/testdata/init/unknown_runtime/manifest-v2.json

@@ -19,14 +19,14 @@
             "useCaseName": "Hello World Example"
         }
     ],
-    "python3.8": [
+    "python3.9": [
         {
-            "directory": "python3.8/cookiecutter-aws-sam-hello",
+            "directory": "python3.9/cookiecutter-aws-sam-hello",
             "displayName": "Hello World Example",
             "dependencyManager": "pip",
             "appTemplate": "hello-world",
             "packageType": "Zip",
             "useCaseName": "Hello World Example"
         }
     ]
-}
+}

tests/functional/testdata/init/unknown_runtime/python3.8/cookiecutter-aws-sam-hello/{{cookiecutter.project_name}}/template.yaml

@@ -16,7 +16,7 @@ Resources:
     Properties:
       CodeUri: hello_world/
       Handler: app.lambda_handler
-      Runtime: python3.8
+      Runtime: python3.9
       {%- if cookiecutter.architectures.value != []%}
       Architectures:
       {%- for arch in cookiecutter.architectures.value %}

tests/functional/testdata/init/unknown_runtime/python3.9/cookiecutter-aws-sam-hello/{{cookiecutter.project_name}}/hello_world/app.py

@@ -0,0 +1,44 @@
+import json
+
+# import requests
+
+
+def lambda_handler(event, context):
+    """Sample pure Lambda function
+
+    Parameters
+    ----------
+    event: dict, required
+        API Gateway Lambda Proxy Input Format
+
+        Event doc: https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-proxy-integrations.html#api-gateway-simple-proxy-for-lambda-input-format
+
+    context: object, required
+        Lambda Context runtime methods and attributes
+
+        Context doc: https://docs.aws.amazon.com/lambda/latest/dg/python-context-object.html
+
+    Returns
+    ------
+    API Gateway Lambda Proxy Output Format: dict
+
+        Return doc: https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-proxy-integrations.html
+    """
+
+    # try:
+    #     ip = requests.get("http://checkip.amazonaws.com/")
+    # except requests.RequestException as e:
+    #     # Send some context about this error to Lambda Logs
+    #     print(e)
+
+    #     raise e
+
+    return {
+        "statusCode": 200,
+        "body": json.dumps(
+            {
+                "message": "hello world",
+                # "location": ip.text.replace("\n", "")
+            }
+        ),
+    }

tests/functional/testdata/init/unknown_runtime/python3.9/cookiecutter-aws-sam-hello/{{cookiecutter.project_name}}/hello_world/requirements.txt

@@ -0,0 +1 @@
+requests

tests/functional/testdata/init/unknown_runtime/python3.9/cookiecutter-aws-sam-hello/{{cookiecutter.project_name}}/template.yaml

@@ -0,0 +1,45 @@
+AWSTemplateFormatVersion: '2010-09-09'
+Transform: AWS::Serverless-2016-10-31
+Description: >
+  {{ cookiecutter.project_name }}
+
+  Sample SAM Template for {{ cookiecutter.project_name }}
+
+# More info about Globals: https://github.com/awslabs/serverless-application-model/blob/master/docs/globals.rst
+Globals:
+  Function:
+    Timeout: 3
+
+Resources:
+  HelloWorldFunction:
+    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
+    Properties:
+      CodeUri: hello_world/
+      Handler: app.lambda_handler
+      Runtime: python3.9
+      {%- if cookiecutter.architectures.value != []%}
+      Architectures:
+      {%- for arch in cookiecutter.architectures.value %}
+        - {{arch}}
+      {%- endfor %}
+      {%- endif %}
+      Events:
+        HelloWorld:
+          Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
+          Properties:
+            Path: /hello
+            Method: get
+
+Outputs:
+  # ServerlessRestApi is an implicit API created out of Events key under Serverless::Function
+  # Find out more about other implicit resources you can reference within SAM
+  # https://github.com/awslabs/serverless-application-model/blob/master/docs/internals/generated_resources.rst#api
+  HelloWorldApi:
+    Description: "API Gateway endpoint URL for Prod stage for Hello World function"
+    Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/hello/"
+  HelloWorldFunction:
+    Description: "Hello World Lambda Function ARN"
+    Value: !GetAtt HelloWorldFunction.Arn
+  HelloWorldFunctionIamRole:
+    Description: "Implicit IAM Role created for Hello World function"
+    Value: !GetAtt HelloWorldFunctionRole.Arn

tests/functional/testdata/init/unknown_runtime/python3.9/cookiecutter-aws-sam-hello/{{cookiecutter.project_name}}/unique_test_file.txt

@@ -0,0 +1 @@
+The file was provided to confirm that all unsupported runtime were eliminated and only supported runtime was provided to the customer to select

tests/functional/testdata/init/unknown_runtime/random.runtime1/cookiecutter-aws-sam-hello/{{cookiecutter.project_name}}/template.yaml

@@ -16,7 +16,7 @@ Resources:
     Properties:
       CodeUri: hello_world/
       Handler: app.lambda_handler
-      Runtime: python3.8
+      Runtime: python3.9
       {%- if cookiecutter.architectures.value != []%}
       Architectures:
       {%- for arch in cookiecutter.architectures.value %}

tests/functional/testdata/init/unknown_runtime/random.runtime2/cookiecutter-aws-sam-hello/{{cookiecutter.project_name}}/template.yaml

@@ -16,7 +16,7 @@ Resources:
     Properties:
       CodeUri: hello_world/
       Handler: app.lambda_handler
-      Runtime: python3.8
+      Runtime: python3.9
       {%- if cookiecutter.architectures.value != []%}
       Architectures:
       {%- for arch in cookiecutter.architectures.value %}

tests/integration/buildcmd/test_build_cmd_python.py

@@ -69,8 +69,8 @@ def _test_default_requirements_wrapper(self, runtime, dockerfile):
 
     @parameterized.expand(
         [
-            *[(runtime, "Dockerfile") for runtime in ["3.8", "3.9", "3.10", "3.11"]],
-            *[(runtime, "Dockerfile.production") for runtime in ["3.8", "3.9", "3.10", "3.11"]],
+            *[(runtime, "Dockerfile") for runtime in ["3.9", "3.10", "3.11"]],
+            *[(runtime, "Dockerfile.production") for runtime in ["3.9", "3.10", "3.11"]],
         ]
     )
     def test_with_default_requirements(self, runtime, dockerfile):
@@ -158,8 +158,8 @@ def _test_default_requirements_wrapper(self, runtime, dockerfile, expected):
 
     @parameterized.expand(
         [
-            *[(runtime, "feature_phi/Dockerfile", {"phi": "1.62"}) for runtime in ["3.8", "3.9", "3.10", "3.11"]],
-            *[(runtime, "feature_pi/Dockerfile", {"pi": "3.14"}) for runtime in ["3.8", "3.9", "3.10", "3.11"]],
+            *[(runtime, "feature_phi/Dockerfile", {"phi": "1.62"}) for runtime in ["3.9", "3.10", "3.11"]],
+            *[(runtime, "feature_pi/Dockerfile", {"pi": "3.14"}) for runtime in ["3.9", "3.10", "3.11"]],
         ]
     )
     def test_with_default_requirements(self, runtime, dockerfile, expected):

tests/integration/deploy/test_managed_stack_deploy.py

@@ -17,7 +17,7 @@
 # This is to restrict package tests to run outside of CI/CD, when the branch is not master or tests are not run by Canary
 SKIP_MANAGED_STACK_TESTS = RUNNING_ON_CI and RUNNING_TEST_FOR_MASTER_ON_CI and not RUN_BY_CANARY
 # Limits the managed stack tests to be run on a single python version to avoid CI race conditions
-IS_TARGETTED_PYTHON_VERSION = PYTHON_VERSION.startswith("3.8")
+IS_TARGETTED_PYTHON_VERSION = PYTHON_VERSION.startswith("3.9")
 
 CFN_PYTHON_VERSION_SUFFIX = PYTHON_VERSION.replace(".", "-")
 # Set region for managed stacks to be in a different region than the ones in deploy