Use workers-py!

.github/workflows/test.yml

@@ -19,27 +19,19 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Set up Python
-        uses: actions/setup-python@v4
-        with:
-          python-version: '3.12'
-
-      - name: Install Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: 22
+      - name: Install uv
+        uses: astral-sh/setup-uv@v5
 
       - name: Install project dependencies
-        run: npm install
-
-      - name: Run build with npm script
-        run: npm run build
+        run: uv sync
 
       - name: Lint and format
-        run: npm run lint
+        run: |
+          uv run ruff format . --check
+          uv run ruff check .
 
       - name: Test worker deployment
-        run: npm run deploy -- --dry-run
+        run: uv run pywrangler deploy --dry-run
 
       - name: Run tests
-        run: npm run test
+        run: uv run pytest tests

.gitignore

@@ -1,5 +1,6 @@
 .venv/
-.venv-pyodide/
+.venv-workers/
+.ruff_cache/
 .pytest_cache/
 node_modules/
 package-lock.json

.python-version

@@ -0,0 +1 @@
+3.12

README.md

@@ -7,54 +7,37 @@ This is an example of a Python Worker that uses the FastMCP package.
 >[!NOTE]
 >Due to the [size](https://developers.cloudflare.com/workers/platform/limits/#worker-size) of the Worker, this example can only be deployed if you're using the Workers Paid plan. Free plan users will encounter deployment errors because this Worker exceeds the 3MB size limit.
 
-## Adding Packages
-
-Vendored packages are added to your source files and need to be installed in a special manner. The Python Workers team plans to make this process automatic in the future, but for now, manual steps need to be taken.
-
-### Vendoring Packages
-
-First, install Python3.12 and pip for Python 3.12.
-
-*Currently, other versions of Python will not work - use 3.12!*
-
-Then set up your local pyodide virtual environment:
-```console
-npm run build
-```
-
-### Developing and Deploying
+## Developing and Deploying
 
 To develop your Worker run:
+
 ```console
-npm run dev
+uv run pywrangler dev
 ```
 
 To deploy your Worker run:
+
 ```console
-npm run deploy
+uv run pywrangler deploy
 ```
 
-### Testing
+## Testing
 
 To test run:
+
 ```console
-npm run test
+uv run pytest tests
 ```
 
-### Linting and Formatting
+## Linting and Formatting
 
 This project uses Ruff for linting and formatting:
 
 ```console
-npm run lint
+uv ruff format . --check
+uv ruff check .
 ```
 
-### IDE Integration
-
-To have good autocompletions in your IDE simply select .venv-pyodide/bin/python as your IDE's interpreter.
+## IDE Integration
 
-You should also install your dependencies for type hints.
-
-```console
-.venv-pyodide/bin/pip install -r requirements-dev.txt
-```
+To have good autocompletions in your IDE simply select .venv-workers/bin/python as your IDE's interpreter.

pyproject.toml

@@ -1,16 +1,31 @@
+[project]
+name = "python-workers-mcp"
+version = "0.1.0"
+requires-python = "==3.12.*"
+dependencies = ["mcp", "structlog"]
+
+[dependency-groups]
+dev = [
+    "workers-py@git+https://github.com/cloudflare/workers-py",
+    "pytest",
+    "requests",
+    "pytest-asyncio",
+    "ruff",
+]
+
 [tool.ruff]
 target-version = "py312"
 line-length = 100
 [tool.ruff.lint]
 select = [
-    "E",  # pycodestyle errors
-    "F",  # pyflakes
-    "B",  # flake8-bugbear
-    "I",  # isort
+    "E",   # pycodestyle errors
+    "F",   # pyflakes
+    "B",   # flake8-bugbear
+    "I",   # isort
     "C4",  # flake8-comprehensions
     "UP",  # pyupgrade
-    "N",  # pep8-naming
-    "RUF",  # ruff-specific rules
+    "N",   # pep8-naming
+    "RUF", # ruff-specific rules
 ]
 ignore = []
 

src/worker.py

@@ -6,10 +6,10 @@
 
 def setup_server():
     from mcp.server.fastmcp import FastMCP
-    from starlette.middleware import Middleware
     from starlette.middleware.cors import CORSMiddleware
 
     from exceptions import HTTPException, http_exception
+
     mcp = FastMCP("Demo", stateless_http=True)
 
     @mcp.tool()
@@ -34,7 +34,9 @@ def echo_prompt(message: str) -> str:
 
     app = mcp.streamable_http_app()
     app.add_exception_handler(HTTPException, http_exception)
-    app.add_middleware(CORSMiddleware, allow_origins=["*"], allow_methods=["*"], allow_headers=["*"])
+    app.add_middleware(
+        CORSMiddleware, allow_origins=["*"], allow_methods=["*"], allow_headers=["*"]
+    )
     return mcp, app