[1.9] Remove Python 3.8 Support

.buildkite/dagster-buildkite/dagster_buildkite/python_version.py

@@ -7,7 +7,6 @@
 
 class AvailablePythonVersion(str, Enum):
     # Ordering is important here, because some steps will take the highest/lowest available version.
-    V3_8 = "3.8"
     V3_9 = "3.9"
     V3_10 = "3.10"
     V3_11 = "3.11"

.buildkite/dagster-buildkite/dagster_buildkite/steps/helm.py

@@ -20,7 +20,6 @@ def build_helm_steps() -> List[BuildkiteStep]:
         os.path.join("helm", "dagster", "schema"),
         unsupported_python_versions=[
             # run helm schema tests only once, on the latest python version
-            AvailablePythonVersion.V3_8,
             AvailablePythonVersion.V3_9,
             AvailablePythonVersion.V3_10,
             AvailablePythonVersion.V3_11,

.buildkite/dagster-buildkite/dagster_buildkite/steps/packages.py

@@ -272,7 +272,6 @@ def k8s_extra_cmds(version: str, _) -> List[str]:
     PackageSpec(
         "examples/with_airflow",
         unsupported_python_versions=[
-            AvailablePythonVersion.V3_9,
             AvailablePythonVersion.V3_10,
             AvailablePythonVersion.V3_11,
             AvailablePythonVersion.V3_12,

.buildkite/dagster-buildkite/dagster_buildkite/steps/test_project.py

@@ -67,7 +67,7 @@ def build_test_project_steps() -> List[GroupStep]:
             )
             .on_python_image(
                 # py version can be bumped when rebuilt
-                f"buildkite-build-test-project-image:py{AvailablePythonVersion.V3_8}-{BUILDKITE_BUILD_TEST_PROJECT_IMAGE_IMAGE_VERSION}",
+                f"buildkite-build-test-project-image:py{AvailablePythonVersion.V3_9}-{BUILDKITE_BUILD_TEST_PROJECT_IMAGE_IMAGE_VERSION}",
                 [
                     "AIRFLOW_HOME",
                     "AWS_ACCOUNT_ID",

.buildkite/dagster-buildkite/setup.py

@@ -9,7 +9,6 @@
     description="Tools for buildkite automation",
     url="https://github.com/dagster-io/dagster/tree/master/.buildkite/dagster-buildkite",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "License :: OSI Approved :: Apache Software License",

docs/content/concepts/dagster-pipes/aws-glue.mdx

@@ -28,7 +28,7 @@ The [dagster-aws](/\_apidocs/libraries/dagster-aws) integration library provides
 - **In AWS**:
 
   - An existing AWS account
-  - An AWS Glue job with a Python 3.8+ runtime environment
+  - An AWS Glue job with a Python 3.9+ runtime environment
 
 ---
 

docs/content/dagster-plus/deployment/serverless.mdx

@@ -164,7 +164,7 @@ if __name__ == "__main__":
 
 ### Using a different Python version
 
-The default version of Python for Serverless deployments is Python 3.8. Versions 3.9 through 3.12 are also supported. You can specify the version you want by updating your GitHub workflow or using the `--python-version` command line argument:
+The default version of Python for Serverless deployments is Python 3.9. Versions 3.10 through 3.12 are also supported. You can specify the version you want by updating your GitHub workflow or using the `--python-version` command line argument:
 
 - **With GitHub**: Change the `python_version` parameter for the `build_deploy_python_executable` job in your `.github/workflows` files. For example:
 
@@ -190,7 +190,7 @@ The default version of Python for Serverless deployments is Python 3.8. Versions
 
 Dagster+ runs your code on a Docker image that we build as follows:
 
-1. The standard Python "slim" [Docker image](https://hub.docker.com/\_/python), such as `python:3.8-slim` is used as the base.
+1. The standard Python "slim" [Docker image](https://hub.docker.com/\_/python), such as `python:3.9-slim` is used as the base.
 2. The `dagster-cloud[serverless]` module installed in the image.
 
 As far as possible, add all dependencies by including the corresponding native Python bindings in your `setup.py`. When that is not possible, you can build and upload a custom base image that will be used to run your Python code.

docs/dagster-ui-screenshot/setup.py

@@ -16,7 +16,6 @@
     description="Utility for taking automated screenshots from the Dagster UI",
     classifiers=[
         "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "License :: OSI Approved :: Apache Software License",
         "Operating System :: OS Independent",

docs/dagster-university/pages/dagster-dbt/lesson-7/5-preparing-for-a-successful-run.md

@@ -99,7 +99,7 @@ env:
   DAGSTER_CLOUD_URL: ${{ secrets.DAGSTER_CLOUD_ORGANIZATION }}
   DAGSTER_CLOUD_API_TOKEN: ${{ secrets.DAGSTER_CLOUD_API_TOKEN }}
   ENABLE_FAST_DEPLOYS: 'true'
-  PYTHON_VERSION: '3.8'
+  PYTHON_VERSION: '3.12'
   DAGSTER_CLOUD_FILE: 'dagster_cloud.yaml'
   DBT_TARGET: 'prod'
 ```

docs/dagster-university/pages/dagster-essentials/lesson-2/requirements-and-installation.md

@@ -8,7 +8,7 @@ lesson: '2'
 
 To install Dagster, you’ll need:
 
-- **To install Python**. Dagster supports Python 3.8 through 3.12.
+- **To install Python**. Dagster supports Python 3.9 through 3.12.
 - **A package manager like pip or poetry**. If you need to install a package manager, refer to the following installation guides:
   - [pip](https://pip.pypa.io/en/stable/installation/)
   - [Poetry](https://python-poetry.org/docs/)

docs/dagster-university/pages/dagster-essentials/lesson-5/whats-a-code-location.md

@@ -63,7 +63,7 @@ In the following image, each dark purple box is a code location. By separating c
 Code locations can be used to separate code by categories, such as:
 
 - Teams (ex., marketing or product)
-- Python version (ex., legacy code using Python 3.8 and newer Python 3.11 code locations)
+- Python version (ex., legacy code using Python 3.9 and newer Python 3.11 code locations)
 - Dependency versions (ex., one model using PyTorch v1 and another using PyTorch v2)
 
 These code locations are all maintained in one single Dagster deployment, and changes made to one code location won’t lead to downtime in another one. This allows you to silo packages and versions, but still create connections between data assets as needed. For example, an asset in one code location can depend on an asset in another code location.

docs/docs-beta/docs/dagster-plus/deployment/serverless/runtime-environment.md

@@ -14,7 +14,7 @@ Dagster uses [PEX](https://docs.pex-tool.org/) to package your code and deploy t
 
 
 ## Use a different Python version \{#python-version}
-The default Python version for Dagster+ Serverless is Python 3.8. Python versions 3.9 through 3.12 are also supported. You can specify the Python version you want to use in your GitHub or GitLab workflow, or by using the `dagster-cloud` CLI.
+The default Python version for Dagster+ Serverless is Python 3.9. Python versions 3.10 through 3.12 are also supported. You can specify the Python version you want to use in your GitHub or GitLab workflow, or by using the `dagster-cloud` CLI.
 
 <Tabs groupId="method">
 <TabItem value="GitHub" label="GitHub">

docs/docs-beta/docs/getting-started/installation.md

@@ -9,7 +9,7 @@ sidebar_label: Installation
 
 To follow the steps in this guide, you'll need:
 
-- To install Python 3.8 or higher. **Python 3.11 is recommended**.
+- To install Python 3.9 or higher. **Python 3.12 is recommended**.
 - To install pip, a Python package installer
 
 ## Setting up a virtual environment

docs/docs-beta/docs/getting-started/quickstart.md

@@ -27,7 +27,7 @@ Welcome to Dagster! In this guide, you'll use Dagster to create a basic pipeline
 To follow the steps in this guide, you'll need:
 
 - Basic Python knowledge
-- Python 3.8+ installed on your system. Refer to the [Installation guide](/getting-started/installation) for information.
+- Python 3.9+ installed on your system. Refer to the [Installation guide](/getting-started/installation) for information.
 </details>
 
 ## Step 1: Set up the Dagster environment

docs/next/components/mdx/includes/dagster/DagsterVersion.mdx

@@ -1 +1 @@
-Dagster supports Python 3.8 through 3.12.
+Dagster supports Python 3.9 through 3.12.

docs/next/markdoc/partials/DagsterVersion.md

@@ -1 +1 @@
-Dagster supports Python 3.8 through 3.12.
+Dagster supports Python 3.9 through 3.12.

docs/sphinx/_ext/dagster-sphinx/setup.py

@@ -9,7 +9,6 @@
     description="Dagster-specific sphinx extension.",
     url="https://github.com/dagster-io/dagster",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "License :: OSI Approved :: Apache Software License",

docs/sphinx/_ext/sphinx-mdx-builder/tox.ini

@@ -1,7 +1,6 @@
 [tox]
 minversion = 4
 envlist = 
-    python3.8-sphinx{7,8}
     python3.9-sphinx{7,8}
     python3.10-sphinx{7,8}
     python3.11-sphinx{7,8}
@@ -10,7 +9,6 @@ envlist =
 
 [testenv]
 basepython =
-    python3.8: python3.8
     python3.9: python3.9
     python3.10: python3.10
     python3.11: python3.11

examples/development_to_production/setup.py

@@ -17,7 +17,6 @@
     description="Dagster example of local development and production deployment.",
     url="https://github.com/dagster-io/dagster/tree/master/examples/development_to_production",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "License :: OSI Approved :: Apache Software License",
         "Operating System :: OS Independent",

examples/docs_beta_snippets/docs_beta_snippets/dagster-plus/deployment/serverless/runtime-environment/gitlab_disable_pex.yaml

@@ -4,4 +4,4 @@ variables:
   # highlight-end
   DAGSTER_CLOUD_URL: $DAGSTER_CLOUD_URL
   DAGSTER_CLOUD_API_TOKEN: $DAGSTER_CLOUD_API_TOKEN
-  PYTHON_VERSION: '3.8'
+  PYTHON_VERSION: '3.9'

examples/docs_beta_snippets/setup.py

@@ -7,7 +7,6 @@
     license="Apache-2.0",
     url="https://github.com/dagster-io/dagster/tree/master/examples/docs_beta_snippets",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "License :: OSI Approved :: Apache Software License",

examples/docs_snippets/setup.py

@@ -7,7 +7,6 @@
     license="Apache-2.0",
     url="https://github.com/dagster-io/dagster/tree/master/examples/docs_snippets",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "License :: OSI Approved :: Apache Software License",

examples/experimental/assets_yaml_dsl/setup.py

@@ -8,7 +8,6 @@
     description="Dagster example of yaml dsl for building asset graphs",
     url="https://github.com/dagster-io/dagster/tree/master/examples/assets_yaml_dsl",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "License :: OSI Approved :: Apache Software License",
         "Operating System :: OS Independent",

examples/experimental/dagster-airlift/setup.py

@@ -56,7 +56,6 @@ def get_version() -> str:
         "dagster-airlift"
     ),
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",

examples/experimental/dagster-blueprints/setup.py

@@ -27,7 +27,6 @@ def get_version() -> str:
         "dagster-blueprints"
     ),
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",

examples/feature_graph_backed_assets/setup.py

@@ -8,7 +8,6 @@
     description="Dagster example of op and graph-backed assets.",
     url="https://github.com/dagster-io/dagster/tree/master/examples/feature_graph_backed_assets",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "License :: OSI Approved :: Apache Software License",
         "Operating System :: OS Independent",

examples/project_fully_featured/setup.py

@@ -6,7 +6,6 @@
     author="Dagster Labs",
     author_email="[email protected]",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Operating System :: OS Independent",

helm/dagster/schema/setup.py

@@ -9,7 +9,6 @@
     description="Tools for Dagster Helm schema",
     url="https://github.com/dagster-io/dagster/tree/master/helm/dagster/schema",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "License :: OSI Approved :: Apache Software License",

integration_tests/python_modules/dagster-k8s-test-infra/setup.py

@@ -8,7 +8,6 @@
     description="A Dagster integration for k8s-test-infra",
     url="https://github.com/dagster-io/dagster/tree/master/python_modules/libraries/dagster-k8s-test-infra",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "License :: OSI Approved :: Apache Software License",

integration_tests/test_suites/backcompat-test-suite/webserver_service/Dockerfile_user_code_release

@@ -1,4 +1,4 @@
-FROM python:3.8-slim
+FROM python:3.9-slim
 
 ARG USER_CODE_VERSION
 ARG USER_CODE_LIBRARY_VERSION

integration_tests/test_suites/backcompat-test-suite/webserver_service/Dockerfile_user_code_source

@@ -1,4 +1,4 @@
-FROM python:3.8-slim
+FROM python:3.9-slim
 
 ARG USER_CODE_DEFINITIONS_FILE
 

integration_tests/test_suites/backcompat-test-suite/webserver_service/Dockerfile_webserver_release

@@ -1,4 +1,4 @@
-FROM python:3.8-slim
+FROM python:3.9-slim
 
 ARG WEBSERVER_VERSION
 ARG WEBSERVER_LIBRARY_VERSION

integration_tests/test_suites/backcompat-test-suite/webserver_service/Dockerfile_webserver_source

@@ -1,4 +1,4 @@
-FROM python:3.8-slim
+FROM python:3.9-slim
 
 COPY ./python_modules/ /tmp/python_modules/
 

pyproject.toml

@@ -49,7 +49,7 @@ analyzeUnannotatedFunctions = false
 
 # Minimum version of Python on which code must run. This determines the standard library stubs used by
 # pyright.
-pythonVersion = "3.8"
+pythonVersion = "3.9"
 
 # Use "basic" ruleset. This differs from strict in several ways, but most
 # importantly it does not flag untyped code as an error.

python_modules/automation/automation/docker/images/buildkite-build-test-project-image/versions.yaml

@@ -1,3 +1,3 @@
-"3.8":
+"3.9":
   docker_args:
-    BASE_IMAGE: python:3.8-slim
+    BASE_IMAGE: python:3.9-slim

python_modules/automation/automation/docker/images/buildkite-integration-windows/versions.yaml

@@ -1,3 +1,3 @@
-"3.8":
+"3.9":
   docker_args:
-    BASE_IMAGE: python:3.8-windowsservercore-1809
+    BASE_IMAGE: python:3.9-windowsservercore-1809

python_modules/automation/automation/docker/images/buildkite-test/versions.yaml

@@ -1,6 +1,3 @@
-"3.8":
-  docker_args:
-    BASE_IMAGE: python:3.8-slim
 "3.9":
   docker_args:
     BASE_IMAGE: python:3.9-slim

python_modules/automation/automation/docker/images/test-project-base/versions.yaml

@@ -1,6 +1,3 @@
-"3.8":
-  docker_args:
-    BASE_IMAGE: python:3.8-slim
 "3.9":
   docker_args:
     BASE_IMAGE: python:3.9-slim

python_modules/automation/setup.py

@@ -9,7 +9,6 @@
     description="Tools for infrastructure automation",
     url="https://github.com/dagster-io/dagster/tree/master/python_modules/automation",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "License :: OSI Approved :: Apache Software License",

python_modules/dagit/setup.py

@@ -32,7 +32,6 @@ def get_version():
     long_description_content_type="text/markdown",
     url="https://github.com/dagster-io/dagster",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
@@ -42,7 +41,7 @@ def get_version():
     ],
     packages=find_packages(exclude=["dagit_tests*"]),
     include_package_data=True,
-    python_requires=">=3.8,<3.13",
+    python_requires=">=3.9,<3.13",
     install_requires=[
         f"dagster-webserver{pin}",
     ],

python_modules/dagster-graphql/setup.py

@@ -24,7 +24,6 @@ def get_version() -> str:
     description="The GraphQL frontend to python dagster.",
     url="https://github.com/dagster-io/dagster/tree/master/python_modules/dagster-graphql",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
@@ -34,7 +33,7 @@ def get_version() -> str:
     ],
     packages=find_packages(exclude=["dagster_graphql_tests*"]),
     include_package_data=True,
-    python_requires=">=3.8,<3.13",
+    python_requires=">=3.9,<3.13",
     install_requires=[
         f"dagster{pin}",
         "graphene>=3,<4",

python_modules/dagster-pipes/setup.py

@@ -26,7 +26,6 @@ def get_version() -> str:
     long_description=desc,
     url="https://github.com/dagster-io/dagster/tree/master/python_modules/dagster-pipes",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
@@ -36,6 +35,6 @@ def get_version() -> str:
     ],
     packages=find_packages(exclude=["dagster_pipes_tests*"]),
     include_package_data=True,
-    python_requires=">=3.8,<3.13",
+    python_requires=">=3.9,<3.13",
     zip_safe=False,
 )

python_modules/dagster-test/setup.py

@@ -9,15 +9,14 @@
     description="A Dagster integration for test",
     url="https://github.com/dagster-io/dagster/tree/master/python_modules/libraries/dagster-test",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "License :: OSI Approved :: Apache Software License",
         "Operating System :: OS Independent",
     ],
     packages=find_packages(exclude=["dagster_test_tests*"]),
     include_package_data=True,
-    python_requires=">=3.8,<3.13",
+    python_requires=">=3.9,<3.13",
     install_requires=[
         "dagster",
         "pyspark",

python_modules/dagster-webserver/setup.py

@@ -32,7 +32,6 @@ def get_version():
     long_description_content_type="text/markdown",
     url="https://github.com/dagster-io/dagster",
     classifiers=[
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
@@ -42,7 +41,7 @@ def get_version():
     ],
     packages=find_packages(exclude=["dagster_webserver_tests*"]),
     include_package_data=True,
-    python_requires=">=3.8,<3.13",
+    python_requires=">=3.9,<3.13",
     install_requires=[
         # cli
         "click>=7.0,<9.0",