SNOW-3488564: Remove Python 3.9

.github/workflows/daily_jupyter_nb_test.yml

@@ -46,7 +46,7 @@ jobs:
             - name: Setup Python
               uses: actions/setup-python@v4
               with:
-                python-version: 3.9
+                python-version: '3.10'
             - name: Set up uv
               uses: astral-sh/setup-uv@v6
               with:
@@ -78,7 +78,7 @@ jobs:
                     download_name: macos
                   - image_name: windows-latest
                     download_name: windows
-                python-version: ["3.9", "3.10", "3.11"]
+                python-version: ["3.10", "3.11"]
                 # FINANCIAL__ECONOMIC_ESSENTIALS database unavailable in gcp, azure
                 cloud-provider: [aws]
         steps:

.github/workflows/daily_modin_precommit_py39_py310.yml → .github/workflows/daily_modin_precommit_py310.yml

@@ -1,6 +1,6 @@
 # This is copied from original daily_precommit.yml with one change: only run Snowpark pandas tests
 
-name: Daily Snowpark pandas API test with Py3.9 and Py3.10
+name: Daily Snowpark pandas API test with Py3.10
 on:
   schedule:
     # 12 AM UTC
@@ -50,7 +50,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:
@@ -80,7 +80,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:
@@ -105,7 +105,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:
@@ -136,7 +136,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:
@@ -171,7 +171,7 @@ jobs:
             download_name: macos
           - image_name: windows-latest-64-cores
             download_name: windows
-        python-version: ["3.9", "3.10"]
+        python-version: ["3.10"]
         cloud-provider: [aws, azure, gcp]
     steps:
       - name: Checkout Code
@@ -418,7 +418,7 @@ jobs:
             python-version: "3.10"
             cloud-provider: gcp
           - os: ubuntu-latest-64-cores
-            python-version: "3.9"
+            python-version: "3.10"
             cloud-provider: aws
     steps:
       - name: Checkout Code
@@ -509,7 +509,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.9'
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:
@@ -564,7 +564,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.9'
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:

.github/workflows/daily_modin_precommit_py311_py312.yml

@@ -50,7 +50,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:
@@ -184,7 +184,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.9'
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:

.github/workflows/daily_precommit.yml

@@ -49,7 +49,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.9'
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:
@@ -76,7 +76,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:
@@ -105,23 +105,20 @@ jobs:
       matrix:
         include:
           # Ubuntu + rotating cloud providers
-          - { os: {image_name: ubuntu-latest-64-cores, download_name: linux}, python-version: "3.9", cloud-provider: aws }
           - { os: {image_name: ubuntu-latest-64-cores, download_name: linux}, python-version: "3.10", cloud-provider: azure }
           - { os: {image_name: ubuntu-latest-64-cores, download_name: linux}, python-version: "3.11", cloud-provider: gcp }
           - { os: {image_name: ubuntu-latest-64-cores, download_name: linux}, python-version: "3.12", cloud-provider: aws }
           - { os: {image_name: ubuntu-latest-64-cores, download_name: linux}, python-version: "3.13", cloud-provider: azure }
           - { os: {image_name: ubuntu-latest-64-cores, download_name: linux}, python-version: "3.14", cloud-provider: gcp }
 
           # macOS + rotating cloud providers
-          - { os: {image_name: macos-latest, download_name: macos}, python-version: "3.9", cloud-provider: gcp }
           - { os: {image_name: macos-latest, download_name: macos}, python-version: "3.10", cloud-provider: aws }
           - { os: {image_name: macos-latest, download_name: macos}, python-version: "3.11", cloud-provider: azure }
           - { os: {image_name: macos-latest, download_name: macos}, python-version: "3.12", cloud-provider: gcp }
           - { os: {image_name: macos-latest, download_name: macos}, python-version: "3.13", cloud-provider: aws }
           - { os: {image_name: macos-latest, download_name: macos}, python-version: "3.14", cloud-provider: azure }
 
           # Windows + rotating cloud providers
-          - { os: {image_name: windows-latest-64-cores, download_name: windows}, python-version: "3.9", cloud-provider: azure }
           - { os: {image_name: windows-latest-64-cores, download_name: windows}, python-version: "3.10", cloud-provider: gcp }
           - { os: {image_name: windows-latest-64-cores, download_name: windows}, python-version: "3.11", cloud-provider: aws }
           - { os: {image_name: windows-latest-64-cores, download_name: windows}, python-version: "3.12", cloud-provider: azure }
@@ -210,9 +207,8 @@ jobs:
           sudo ACCEPT_EULA=Y apt-get install -y msodbcsql18 unixodbc-dev
         shell: bash
       - name: Run data source tests
-        # psycopg2 is not supported on macos 3.9
         # TODO: enable datasource tests for 3.14
-        if: ${{ !(contains('macos', matrix.os.download_name) && matrix.python-version == '3.9') && !(matrix.python-version == '3.14') }}
+        if: ${{ !(matrix.python-version == '3.14') }}
         run: python -m tox -e datasource
         env:
           PYTHON_VERSION: ${{ matrix.python-version }}
@@ -234,7 +230,7 @@ jobs:
             .tox/coverage.xml
 
   test-fips:
-    name: Test FIPS py-linux-3.9-${{ matrix.cloud-provider }}
+    name: Test FIPS py-linux-3.10-${{ matrix.cloud-provider }}
     needs: build
     runs-on: ubuntu-latest-64-cores
     strategy:
@@ -261,15 +257,15 @@ jobs:
       - name: Run tests
         run: ./ci/test_fips_docker.sh
         env:
-          PYTHON_VERSION: 3.9
+          PYTHON_VERSION: '3.10'
           cloud_provider: ${{ matrix.cloud-provider }}
           PYTEST_ADDOPTS: --color=yes --tb=short
           TOX_PARALLEL_NO_SPINNER: 1
         shell: bash
       - uses: actions/upload-artifact@v4
         with:
           include-hidden-files: true
-          name: coverage_linux-fips-3.9-${{ matrix.cloud-provider }}
+          name: coverage_linux-fips-3.10-${{ matrix.cloud-provider }}
           path: |
             .coverage
             coverage.xml
@@ -284,7 +280,7 @@ jobs:
         os:
           - image_name: macos-latest
             download_name: macos  # it includes doctest
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
         cloud-provider: [aws]
     steps:
       - name: Checkout Code
@@ -362,7 +358,7 @@ jobs:
         os:
           - image_name: macos-latest
             download_name: macos
-        python-version: ["3.9"]
+        python-version: ["3.10"]
         cloud-provider: [aws]
     steps:
       - name: Checkout Code
@@ -437,7 +433,7 @@ jobs:
             image_name: windows-latest
           - download_name: ubuntu
             image_name: ubuntu-latest
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
         cloud-provider: [azure]
     steps:
       - name: Checkout Code
@@ -507,7 +503,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [macos-latest, windows-latest, ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.14"]  # SNOW-2230787 test failing on Python 3.13
+        python-version: ["3.10", "3.11", "3.12", "3.14"]  # SNOW-2230787 test failing on Python 3.13
         cloud-provider: [gcp]
         protobuf-version: ["3.20.1", "4.25.3", "5.28.3"]
     steps:
@@ -577,7 +573,7 @@ jobs:
         os:
           - image_name: macos-latest
             download_name: macos  # it includes doctest
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
         cloud-provider: [azure]
     steps:
       - name: Checkout Code
@@ -655,7 +651,7 @@ jobs:
       matrix:
         include:
           - os: macos-latest
-            python-version: "3.9"
+            python-version: "3.10"
             cloud-provider: azure
           - os: ubuntu-latest
             python-version: "3.12"
@@ -747,7 +743,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.9'
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:
@@ -802,7 +798,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.9'
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:

.github/workflows/precommit.yml

@@ -51,7 +51,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.9'
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:
@@ -78,7 +78,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:
@@ -108,10 +108,6 @@ jobs:
         # matrix is empty for pre-commit, tests are only added
         # through the include directive
         include:
-          # only run py3.9 tests on ubuntu+aws to isolate 3.9 failures
-          - python-version: "3.9"
-            os: ubuntu-latest-64-cores
-            cloud-provider: aws
           # only run azure tests with latest python and ubuntu
           - cloud-provider: azure
             python-version: "3.12"
@@ -212,8 +208,7 @@ jobs:
           sudo ACCEPT_EULA=Y apt-get install -y msodbcsql18 unixodbc-dev
         shell: bash
       - name: Run data source tests
-        # psycopg2 is not supported on macos 3.9
-        if: ${{ !(matrix.os == 'macos-latest' && matrix.python-version == '3.9') }}
+        if: ${{ !(matrix.python-version == '3.14') }}
         run: python -m tox -e datasource
         env:
           PYTHON_VERSION: ${{ matrix.python-version }}
@@ -392,7 +387,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ macos-latest ]
-        python-version: [ "3.9"]
+        python-version: [ "3.10"]
         cloud-provider: [ aws ]
     steps:
       - name: Checkout Code
@@ -520,7 +515,7 @@ jobs:
         # version/cloud/OS permutation coverage.
         include:
           # The steps below are configured to run only doctests for macos-3.12-aws
-          - python-version: "3.9"
+          - python-version: "3.10"
             os: macos-latest
             cloud-provider: aws
           - cloud-provider: gcp
@@ -625,7 +620,7 @@ jobs:
         os:
           - image_name: macos-latest
             download_name: macos
-        python-version: ["3.9"]
+        python-version: ["3.10"]
         cloud-provider: [aws]
     steps:
       - name: Checkout Code
@@ -701,7 +696,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.9'
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:
@@ -763,7 +758,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.9'
+          python-version: '3.10'
       - name: Set up uv
         uses: astral-sh/setup-uv@v6
         with:

CHANGELOG.md

@@ -16,6 +16,10 @@
 
 - Fixed a bug where calling `DataFrame.alias()` twice on the same DataFrame (e.g. for a self-join) caused both aliases to share the same internal column-mapping dictionary. This made `col("R", "col")` resolve to the same column as `col("L", "col")`, producing incorrect join conditions and filter expressions.
 
+#### Deprecations
+
+- Removed support for Python 3.9.
+
 ## 1.51.1 (2026-05-28)
 
 #### Documentation

CONTRIBUTING.md

@@ -34,11 +34,11 @@ cd snowpark-python
 #### Install the library in edit mode and install its dependencies
 
 - Create a new Python virtual environment with any Python version that we support.
-  - The Snowpark Python API supports **Python 3.9, Python 3.10, Python 3.11, Python 3.12 and Python 3.13**.
-  - The Snowpark pandas API supports **Python 3.9, Python 3.10, and Python 3.11**. Additionally, Snowpark pandas requires **Modin 0.36.x or 0.37.x**, and **pandas 2.2.x or 2.3.x**.
+  - The Snowpark Python API supports **Python 3.10, Python 3.11, Python 3.12 and Python 3.13**.
+  - The Snowpark pandas API supports **Python 3.10 and Python 3.11**. Additionally, Snowpark pandas requires **Modin 0.36.x or 0.37.x**, and **pandas 2.2.x or 2.3.x**.
 
     ```bash
-    conda create --name snowpark-dev python=3.9
+    conda create --name snowpark-dev python=3.10
     ```
 
 - Activate the new Python virtual environment. For example,

README.md

@@ -18,9 +18,9 @@ If you don't have a Snowflake account yet, you can [sign up for a 30-day free tr
 
 ### Create a Python virtual environment
 You can use [miniconda][miniconda], [anaconda][anaconda], or [virtualenv][virtualenv]
-to create a Python 3.9, 3.10, 3.11, 3.12 or 3.13 virtual environment.
+to create a Python 3.10, 3.11, 3.12 or 3.13 virtual environment.
 
-For Snowpark pandas, only Python 3.9, 3.10, or 3.11 is supported.
+For Snowpark pandas, only Python 3.10 or 3.11 is supported.
 
 To have the best experience when using it with UDFs, [creating a local conda environment with the Snowflake channel][use snowflake channel] is recommended.
 

ci/docker/snowpark_test_fips/Dockerfile

@@ -19,7 +19,7 @@ RUN sed -i s/mirror.centos.org/vault.centos.org/g /etc/yum.repos.d/*.repo && \
 RUN yum clean all && \
     yum groupinstall -y "Development Tools" && \
     yum install -y redhat-rpm-config gcc libffi-devel wget && \
-    yum install -y perl-IPC-Cmd perl-Digest-SHA perl-Test-Simple perl-Pod-Html python39 python39-devel && \
+    yum install -y perl-IPC-Cmd perl-Digest-SHA perl-Test-Simple perl-Pod-Html python310 python310-devel && \
     yum clean all && \
     rm -rf /var/cache/yum