[v2] Add support for Python 3.14 (aws#10102)

Author: hssyoo

.changes/next-release/enhancement-Python-47496.json

@@ -0,0 +1,5 @@
+{
+  "type": "enhancement",
+  "category": "Python",
+  "description": "Upgrade bundled Python interpreter to version 3.14.3"
+}

.github/workflows/changelog.yml

@@ -56,7 +56,7 @@ jobs:
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
-        python-version: "3.13"
+        python-version: "3.14"
     - name: Create changelog
       run: |
         python scripts/new-change -t '${{ github.event.inputs.type }}' -c '${{ github.event.inputs.category }}' -d '${{ github.event.inputs.description }}'

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

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
         os: [ubuntu-latest, macOS-latest, windows-latest]
 
     steps:

.github/workflows/run-tests.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
         os: [ubuntu-latest, macOS-latest, windows-latest]
 
     steps:

.github/workflows/source-dist-tests.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
         os: [ubuntu-latest, macOS-latest, windows-latest]
     steps:
     - uses: actions/checkout@v2

.github/workflows/update-lockfiles.yml

@@ -30,7 +30,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.13"]
+        python-version: ["3.14"]
         os: [macOS-latest, windows-latest]
 
     steps:

awscli/customizations/eks/ordered_yaml.py

@@ -51,6 +51,7 @@ def ordered_yaml_dump(to_dump, stream=None):
     """
     yaml = ruamel.yaml.YAML(typ="safe", pure=True)
     yaml.default_flow_style = False
+    yaml.width = float('inf')
     yaml.Representer.add_representer(OrderedDict, _ordered_representer)
 
     if stream is None:

awscli/customizations/s3/s3handler.py

@@ -629,9 +629,7 @@ def _submit_transfer_request(self, fileinfo, extra_args, subscribers):
             self._result_queue.put(SuccessResult(**result_kwargs))
         except Exception as e:
             self._result_queue.put(FailureResult(exception=e, **result_kwargs))
-        finally:
-            # Return True to indicate that the transfer was submitted
-            return True
+        return True
 
     def _format_src_dest(self, fileinfo):
         return self._format_local_path(fileinfo.src), None

pyproject.toml

@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-"flit_core>=3.7.1,<3.9.1",
+"flit_core>=3.7.1,<3.12.1",
 ]
 build-backend = "pep517"
 backend-path = ["backends"]
@@ -28,16 +28,17 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     'Programming Language :: Python :: 3.12',
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
 ]
 dependencies = [
     "colorama>=0.2.5,<0.4.7",
     "docutils>=0.10,<0.20",
-    "ruamel.yaml>=0.15.0,<=0.17.21",
+    "ruamel.yaml>=0.15.0,<=0.19.1",
     # ruamel.yaml only requires ruamel.yaml.clib for Python versions
     # less than or equal to Python 3.10. In order to ensure we have
     # a consistent dependency closure across all Python versions,
     # we explicitly include ruamel.yaml.clib as a dependency.
-    "ruamel.yaml.clib>=0.2.0,<=0.2.12",
+    "ruamel.yaml.clib>=0.2.0,<=0.2.15",
     "prompt-toolkit>=3.0.24,<3.0.52",
     "distro>=1.5.0,<1.9.0",
     "awscrt==0.31.2",

requirements-base-lock.txt

@@ -4,11 +4,15 @@
 #
 #    pip-compile --allow-unsafe --generate-hashes --output-file=requirements-base-lock.txt --unsafe-package=flit-core --unsafe-package=pip --unsafe-package=setuptools --unsafe-package=wheel requirements-base.txt
 #
+packaging==26.0 \
+    --hash=sha256:00243ae351a257117b6a241061796684b084ed1c516a08c48a3f7e147a9d80b4 \
+    --hash=sha256:b36f1fef9334a5588b4166f8bcd26a14e521f2b55e6b9de3aaa80d3ff7a37529
+    # via wheel
 
 # The following packages are considered to be unsafe in a requirements file:
-flit-core==3.9.0 \
-    --hash=sha256:72ad266176c4a3fcfab5f2930d76896059851240570ce9a98733b658cb786eba \
-    --hash=sha256:7aada352fb0c7f5538c4fafeddf314d3a6a92ee8e2b1de70482329e42de70301
+flit-core==3.12.0 \
+    --hash=sha256:18f63100d6f94385c6ed57a72073443e1a71a4acb4339491615d0f16d6ff01b2 \
+    --hash=sha256:e7a0304069ea895172e3c7bb703292e992c5d1555dd1233ab7b5621b5b69e62c
     # via -r requirements-base.txt
 wheel==0.46.3 \
     --hash=sha256:4b399d56c9d9338230118d705d9737a2a468ccca63d5e813e2a4fc7815d8bc4d \