chore(librarian): for generation, bump python runtime to 3.14.2; drop 3.13 (googleapis#15004)

parthea · web-flow · commit 1e3be6321d03 · 2026-01-08T12:58:43.000-05:00
This PR makes the following changes to the Python Librarian Generator image - bumps the runtime for 3.14 to 3.14.2 - drop 3.13 following googleapis/librarian#2945 which is now fixed
diff --git a/.generator/Dockerfile b/.generator/Dockerfile
@@ -40,27 +40,25 @@ RUN apt-get update && \
     && apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
-# `make altinstall` is used to prevent replacing the system's default python binary.
+ENV PYTHON_VERSION=3.14
+
 # The full Python version, including the minor version, is needed for download/install
-# TODO(https://github.com/googleapis/librarian/issues/2945): Remove `3.13` when the linked issue is resolved.
-RUN for PYTHON_VERSION_WITH_MINOR in 3.13.9 3.14.0; do \
-    wget https://www.python.org/ftp/python/${PYTHON_VERSION_WITH_MINOR}/Python-${PYTHON_VERSION_WITH_MINOR}.tgz && \
+ENV PYTHON_VERSION_WITH_MINOR=3.14.2
+
+# `make altinstall` is used to prevent replacing the system's default python binary.
+RUN wget https://www.python.org/ftp/python/${PYTHON_VERSION_WITH_MINOR}/Python-${PYTHON_VERSION_WITH_MINOR}.tgz && \
     tar -xvf Python-${PYTHON_VERSION_WITH_MINOR}.tgz && \
     cd Python-${PYTHON_VERSION_WITH_MINOR} && \
     ./configure --enable-optimizations --prefix=/usr/local && \
     make -j$(nproc) && \
     make altinstall && \
     cd / && \
-    rm -rf Python-${PYTHON_VERSION_WITH_MINOR}* \
-    ; done
+    rm -rf Python-${PYTHON_VERSION_WITH_MINOR}*
+
 
-# Install pip for each python version
-# TODO(https://github.com/googleapis/librarian/issues/2945): Remove `3.13` when the linked issue is resolved.
-RUN for PYTHON_VERSION in 3.13 3.14; do \
-    wget --no-check-certificate -O /tmp/get-pip.py 'https://bootstrap.pypa.io/get-pip.py' && \
+RUN wget --no-check-certificate -O /tmp/get-pip.py 'https://bootstrap.pypa.io/get-pip.py' && \
     python${PYTHON_VERSION} /tmp/get-pip.py && \
-    rm /tmp/get-pip.py \
-    ; done
+    rm /tmp/get-pip.py
 
 # Download/extract protoc
 RUN wget https://github.com/protocolbuffers/protobuf/releases/download/v25.3/protoc-25.3-linux-x86_64.zip
@@ -112,10 +110,6 @@ COPY --from=builder synthtool /synthtool
 COPY --from=builder /usr/local/bin/python${PYTHON_VERSION_DEFAULT}  /usr/local/bin/
 COPY --from=builder /usr/local/lib/python${PYTHON_VERSION_DEFAULT}  /usr/local/lib/python${PYTHON_VERSION_DEFAULT}
 
-# TODO(https://github.com/googleapis/librarian/issues/2945): Remove `3.13` when the linked issue is resolved.
-COPY --from=builder /usr/local/bin/python3.13  /usr/local/bin
-COPY --from=builder /usr/local/lib/python3.13  /usr/local/lib/python3.13
-
 # Set the working directory in the container.
 WORKDIR /app
 
diff --git a/.generator/cli.py b/.generator/cli.py
@@ -995,16 +995,7 @@ def _run_nox_sessions(library_id: str, repo: str, is_mono_repo: bool):
             the config.yaml.
         is_mono_repo(bool): True if the current repository is a mono-repo.
     """
-    path_to_library = f"{repo}/packages/{library_id}" if is_mono_repo else repo
-    _python_314_supported = Path(
-        f"{path_to_library}/testing/constraints-3.14.txt"
-    ).exists()
-
-    if _python_314_supported:
-        session_runtime = "3.14"
-    else:
-        session_runtime = "3.13"
-
+    session_runtime = "3.14"
     sessions = [
         f"unit-{session_runtime}(protobuf_implementation='upb')",
     ]
diff --git a/.generator/test_cli.py b/.generator/test_cli.py
@@ -776,26 +776,22 @@ def test_run_individual_session_failure(mocker):
 
 
 @pytest.mark.parametrize(
-    "is_mono_repo,py314_constraints_file_exists, nox_session_python_runtime",
+    "is_mono_repo, nox_session_python_runtime",
     [
-        (False, True, "3.14"),
-        (True, True, "3.14"),
-        (True, False, "3.13"),
-        (False, False, "3.13"),
+        (False, "3.14"),
+        (True, "3.14"),
     ],
 )
 def test_run_nox_sessions_success(
     mocker,
     mock_generate_request_data_for_nox,
     is_mono_repo,
-    py314_constraints_file_exists,
     nox_session_python_runtime,
 ):
     """Tests that _run_nox_sessions successfully runs all specified sessions."""
     mocker.patch("cli._read_json_file", return_value=mock_generate_request_data_for_nox)
     mocker.patch("cli._get_library_id", return_value="mock-library")
     mock_run_individual_session = mocker.patch("cli._run_individual_session")
-    mocker.patch("pathlib.Path.exists", return_value=py314_constraints_file_exists)
 
     sessions_to_run = [
         f"unit-{nox_session_python_runtime}(protobuf_implementation='upb')",
