Add Python3.9-3.15 supporting

Author: Вадим Козыревский

.github/workflows/python-publish.yml

@@ -13,12 +13,12 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ "3.10", "3.11", "3.12" ]
+        python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13", "3.14" ]
 
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies
@@ -28,6 +28,6 @@ jobs:
       - name: Build package
         run: python -m build
       - name: Publish package
-        if: success() && github.event_name == 'release' && matrix.python-version == '3.12'
+        if: success() && github.event_name == 'release' && matrix.python-version == '3.14'
         run: |
           twine upload dist/* --username __token__ --password ${{ secrets.PYPI_API_TOKEN }}

.github/workflows/tests.yml

@@ -9,10 +9,26 @@ on:
 jobs:
   lint:
     runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.experimental || false }}
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11", "3.12"]
+        include:
+          - python-version: "3.9"
+            pyright-version: "3.9"
+          - python-version: "3.10"
+            pyright-version: "3.10"
+          - python-version: "3.11"
+            pyright-version: "3.11"
+          - python-version: "3.12"
+            pyright-version: "3.12"
+          - python-version: "3.13"
+            pyright-version: "3.13"
+          - python-version: "3.14"
+            pyright-version: "3.14"
+          - python-version: "3.15-dev"
+            pyright-version: "3.14"
+            experimental: true
 
     steps:
     - uses: actions/checkout@v4
@@ -23,6 +39,7 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
+        allow-prereleases: true
 
     - name: Install dependencies
       run: |
@@ -61,20 +78,30 @@ jobs:
         while IFS= read -r f; do [ -f "$f" ] && echo "$f"; done < changed.txt | xargs -r ruff format --check --config ruff.toml
 
     - name: Run pyright
+      if: ${{ matrix.python-version != '3.15-dev' }}
       run: |
-        pyright --pythonversion ${{ matrix.python-version }} src tests examples
+        pyright --pythonversion ${{ matrix.pyright-version }} src
 
     - name: Check minimum Python version (vermin)
       run: |
-        vermin --target=3.10- --violations --eval-annotations --backport typing_extensions --exclude=venv --exclude=build --exclude=.git --exclude=.venv src examples tests
+        vermin --target=3.9- --violations --eval-annotations --backport typing_extensions --exclude=venv --exclude=build --exclude=.git --exclude=.venv src examples tests
 
   test:
     name: test (py ${{ matrix.python-version }})
     runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.experimental || false }}
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11", "3.12"]
+        include:
+          - python-version: "3.9"
+          - python-version: "3.10"
+          - python-version: "3.11"
+          - python-version: "3.12"
+          - python-version: "3.13"
+          - python-version: "3.14"
+          - python-version: "3.15-dev"
+            experimental: true
 
     steps:
     - uses: actions/checkout@v4
@@ -83,6 +110,7 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
+        allow-prereleases: true
 
     - name: Install dependencies
       run: |

.pre-commit-config.yaml

@@ -53,14 +53,14 @@ repos:
   hooks:
   - id: pytest-unit
     name: unit tests
-    entry: pytest -c ./tests/pytest-config.ini ./tests/unit
+    entry: env PYTHONPATH=src ./venv/bin/python -m pytest -c ./tests/pytest-config.ini ./tests/unit
     language: system
     types: [python]
     pass_filenames: false
     always_run: true
   - id: pytest-integration
     name: integration tests
-    entry: pytest -c ./tests/pytest-config.ini ./tests/integration
+    entry: env PYTHONPATH=src ./venv/bin/python -m pytest -c ./tests/pytest-config.ini ./tests/integration
     language: system
     types: [python]
     pass_filenames: false

README.md

@@ -2,7 +2,7 @@
   <h1>Python CQRS</h1>
   <p><strong>Event-Driven Architecture Framework for Distributed Systems</strong></p>
   <p>
-    <strong>Python 3.10+</strong> · Full documentation: <a href="https://mkdocs.python-cqrs.dev/">mkdocs.python-cqrs.dev</a>
+    <strong>Python 3.9+</strong> · Full documentation: <a href="https://mkdocs.python-cqrs.dev/">mkdocs.python-cqrs.dev</a>
   </p>
   <p>
     <a href="https://pypi.org/project/python-cqrs/">
@@ -88,7 +88,7 @@ project ([documentation](https://akhundmurad.github.io/diator/)) with several en
 
 ## Installation
 
-**Python 3.10+** is required.
+**Python 3.9+** is required. CI runs on Python **3.9-3.14** and also tracks **3.15-dev** compatibility.
 
 ```bash
 pip install python-cqrs

docker-compose-dev.yml

@@ -1,4 +1,3 @@
-version: '3'
 services:
   mysql_dev:
     image: mysql:8.3.0

examples/cor_mermaid.py

@@ -81,7 +81,7 @@ class PaymentResult(cqrs.Response):
     """Payment processing result."""
 
     success: bool
-    transaction_id: str | None = None
+    transaction_id: typing.Optional[str] = None
     message: str = ""
 
 
@@ -109,7 +109,7 @@ def __init__(self) -> None:
     def events(self) -> typing.List[Event]:
         return self._events.copy()
 
-    async def handle(self, request: ProcessPaymentCommand) -> PaymentResult | None:
+    async def handle(self, request: ProcessPaymentCommand) -> typing.Optional[PaymentResult]:
         """Process credit card payment."""
         if request.payment_method == "credit_card":
             transaction_id = f"cc_{request.user_id}_{int(request.amount * 100)}"
@@ -143,7 +143,7 @@ def __init__(self) -> None:
     def events(self) -> typing.List[Event]:
         return self._events.copy()
 
-    async def handle(self, request: ProcessPaymentCommand) -> PaymentResult | None:
+    async def handle(self, request: ProcessPaymentCommand) -> typing.Optional[PaymentResult]:
         """Process PayPal payment."""
         if request.payment_method == "paypal":
             transaction_id = f"pp_{request.user_id}_{int(request.amount * 100)}"
@@ -177,7 +177,7 @@ def __init__(self) -> None:
     def events(self) -> typing.List[Event]:
         return self._events.copy()
 
-    async def handle(self, request: ProcessPaymentCommand) -> PaymentResult | None:
+    async def handle(self, request: ProcessPaymentCommand) -> typing.Optional[PaymentResult]:
         """Process bank transfer payment."""
         if request.payment_method == "bank_transfer":
             transaction_id = f"bt_{request.user_id}_{int(request.amount * 100)}"
@@ -207,7 +207,7 @@ class DefaultPaymentHandler(CORRequestHandler[ProcessPaymentCommand, PaymentResu
     def events(self) -> typing.List[Event]:
         return []
 
-    async def handle(self, request: ProcessPaymentCommand) -> PaymentResult | None:
+    async def handle(self, request: ProcessPaymentCommand) -> typing.Optional[PaymentResult]:
         """Handle unsupported payment methods."""
         return PaymentResult(
             success=False,

examples/cor_request_fallback.py

@@ -55,6 +55,7 @@
 
 import asyncio
 import logging
+import typing
 
 import di
 from di import dependent
@@ -96,7 +97,7 @@ class SourceAHandler(CORRequestHandler[FetchDataCommand, FetchDataResult]):
     def events(self) -> list[cqrs.Event]:
         return []
 
-    async def handle(self, request: FetchDataCommand) -> FetchDataResult | None:
+    async def handle(self, request: FetchDataCommand) -> typing.Optional[FetchDataResult]:
         if request.source == "a":
             logger.info("COR chain: SourceAHandler handled source=a")
             HANDLER_SOURCE.append("chain")
@@ -109,7 +110,7 @@ class SourceBHandler(CORRequestHandler[FetchDataCommand, FetchDataResult]):
     def events(self) -> list[cqrs.Event]:
         return []
 
-    async def handle(self, request: FetchDataCommand) -> FetchDataResult | None:
+    async def handle(self, request: FetchDataCommand) -> typing.Optional[FetchDataResult]:
         if request.source == "b":
             logger.info("COR chain: SourceBHandler handled source=b")
             HANDLER_SOURCE.append("chain")
@@ -124,7 +125,7 @@ class DefaultChainHandler(CORRequestHandler[FetchDataCommand, FetchDataResult]):
     def events(self) -> list[cqrs.Event]:
         return []
 
-    async def handle(self, request: FetchDataCommand) -> FetchDataResult | None:
+    async def handle(self, request: FetchDataCommand) -> typing.Optional[FetchDataResult]:
         if request.source == "error":
             logger.info("COR chain: DefaultChainHandler raising ConnectionError for source=error")
             raise ConnectionError("Downstream service unavailable")

examples/cor_request_handler.py

@@ -82,7 +82,7 @@ class ProcessPaymentCommand(cqrs.Request):
 
 class PaymentResult(cqrs.Response):
     success: bool
-    transaction_id: str | None = None
+    transaction_id: typing.Optional[str] = None
     message: str = ""
 
 
@@ -101,7 +101,7 @@ def __init__(self) -> None:
         super().__init__()
         self._events: typing.List[cqrs.Event] = []
 
-    async def handle(self, request: ProcessPaymentCommand) -> PaymentResult | None:
+    async def handle(self, request: ProcessPaymentCommand) -> typing.Optional[PaymentResult]:
         if request.payment_method == "credit_card":
             transaction_id = f"cc_{request.user_id}_{int(request.amount * 100)}"
             TRANSACTIONS["credit_card"].append(transaction_id)
@@ -134,7 +134,7 @@ def __init__(self) -> None:
         super().__init__()
         self._events: typing.List[cqrs.Event] = []
 
-    async def handle(self, request: ProcessPaymentCommand) -> PaymentResult | None:
+    async def handle(self, request: ProcessPaymentCommand) -> typing.Optional[PaymentResult]:
         if request.payment_method == "paypal":
             transaction_id = f"pp_{request.user_id}_{int(request.amount * 100)}"
             TRANSACTIONS["paypal"].append(transaction_id)
@@ -167,7 +167,7 @@ def __init__(self) -> None:
         super().__init__()
         self._events: typing.List[cqrs.Event] = []
 
-    async def handle(self, request: ProcessPaymentCommand) -> PaymentResult | None:
+    async def handle(self, request: ProcessPaymentCommand) -> typing.Optional[PaymentResult]:
         if request.payment_method == "bank_transfer":
             transaction_id = f"bt_{request.user_id}_{int(request.amount * 100)}"
             TRANSACTIONS["bank_transfer"].append(transaction_id)
@@ -198,7 +198,7 @@ class DefaultPaymentHandler(CORRequestHandler[ProcessPaymentCommand, PaymentResu
     def events(self) -> typing.List[cqrs.Event]:
         return []
 
-    async def handle(self, request: ProcessPaymentCommand) -> PaymentResult | None:
+    async def handle(self, request: ProcessPaymentCommand) -> typing.Optional[PaymentResult]:
         # Default handler always handles the request (end of chain)
         print(
             f"Default: Unsupported payment method '{request.payment_method}' for user {request.user_id}",

examples/kafka_event_consuming.py

@@ -114,7 +114,7 @@ async def empty_message_decoder(
         [kafka.KafkaMessage],
         typing.Awaitable[types.DecodedMessage],
     ],
-) -> types.DecodedMessage | None:
+) -> typing.Optional[types.DecodedMessage]:
     """
     Decode a kafka message and return it if it is not empty.
     """
@@ -158,7 +158,7 @@ def mediator_factory() -> cqrs.EventMediator:
     decoder=empty_message_decoder,
 )
 async def hello_world_event_handler(
-    body: cqrs.NotificationEvent[HelloWorldPayload] | deserializers.DeserializeJsonError | None,
+    body: typing.Union[cqrs.NotificationEvent[HelloWorldPayload], typing.Optional[deserializers.DeserializeJsonError]],
     msg: kafka.KafkaMessage,
     mediator: cqrs.EventMediator = faststream.Depends(mediator_factory),
 ):

examples/saga.py

@@ -86,6 +86,7 @@
 import asyncio
 import dataclasses
 import logging
+import typing
 import uuid
 
 import di
@@ -119,9 +120,9 @@ class OrderContext(SagaContext):
     shipping_address: str
 
     # These fields are populated by steps during execution
-    inventory_reservation_id: str | None = None
-    payment_id: str | None = None
-    shipment_id: str | None = None
+    inventory_reservation_id: typing.Optional[str] = None
+    payment_id: typing.Optional[str] = None
+    shipment_id: typing.Optional[str] = None
 
 
 # ============================================================================