Add OAuth 2 client library for Python

.github/workflows/ci-aiohttp.yml

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+name: aiohttp
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  tests:
+    name: aiohttp ${{ matrix.label }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - label: minimum
+            aiohttp: 'aiohttp==3.13.0'
+          - label: latest
+            aiohttp: aiohttp
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.12'
+          cache: pip
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -e ".[dev,generator]" "${{ matrix.aiohttp }}"
+          python -m pip check
+
+      - name: Run aiohttp tests
+        run: python scripts/run_tests.py -q -m aiohttp

.github/workflows/ci-httpx.yml

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+name: HTTPX
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  tests:
+    name: HTTPX ${{ matrix.label }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - label: minimum
+            httpx: 'httpx==0.28.0'
+          - label: latest
+            httpx: httpx
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.12'
+          cache: pip
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -e ".[dev,generator]" "${{ matrix.httpx }}"
+          python -m pip check
+
+      - name: Run HTTPX tests
+        run: python scripts/run_tests.py -q -m httpx

.github/workflows/ci-openapi.yml

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+name: OpenAPI Generator
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  generated-clients:
+    name: OpenAPI Generator ${{ matrix['generator-version'] }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        generator-version:
+          - '7.23.0'
+          - '7.24.0'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.14'
+          cache: pip
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -e ".[dev]" "openapi-generator-cli[jdk4py]==${{ matrix['generator-version'] }}"
+          python -m pip check
+
+      - name: Run generated-client tests
+        run: python scripts/run_tests.py -q -m generated

.github/workflows/ci-python.yml

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+name: Python
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  tests:
+    name: Python ${{ matrix['python-version'] }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - python-version: '3.12'
+            cryptography: 'cryptography==45.0.1'
+          - python-version: '3.13'
+            cryptography: cryptography
+          - python-version: '3.14'
+            cryptography: cryptography
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Set up Python ${{ matrix['python-version'] }}
+        uses: actions/setup-python@v6
+        with:
+          python-version: ${{ matrix['python-version'] }}
+          cache: pip
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -e ".[dev]" "${{ matrix.cryptography }}"
+          python -m pip check
+
+      - name: Run tests
+        run: python -m pytest -q tests/unit tests/integration --ignore-glob='**/test_openapi*.py'

.github/workflows/ci-urllib3.yml

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+name: urllib3
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  tests:
+    name: urllib3 ${{ matrix.label }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - label: minimum
+            urllib3: 'urllib3==2.1.0'
+          - label: latest
+            urllib3: urllib3
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.12'
+          cache: pip
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -e ".[dev,generator]" "${{ matrix.urllib3 }}"
+          python -m pip check
+
+      - name: Run generated urllib3 tests
+        run: python scripts/run_tests.py -q -m urllib3

.github/workflows/quality.yml

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+name: Quality
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  checks:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.12'
+          cache: pip
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -e ".[dev,generator]"
+          python -m pip check
+
+      - name: Lint
+        run: python -m ruff check .
+
+      - name: Type check
+        run: python -m mypy
+
+      - name: Build distributions
+        run: python -m build
+
+      - name: Check distributions
+        run: python -m twine check dist/*
+
+      - name: Check wheel
+        run: python scripts/check_wheel.py

.gitignore

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+__pycache__/
+*.py[cod]
+.coverage
+.env
+.env.*
+!.env.example
+.venv/
+.idea/
+.mypy_cache/
+.pytest_cache/
+.ruff_cache/
+.cache/
+build/
+dist/
+*.egg-info/
+docs/
+.github/agents/
+.github/ai-framework/
+.github/skills/
+.github/copilot-instructions.md
+tests/generated/

LICENSE

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+Copyright 2025 - 2026 Mastercard
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.