Python weather server - Add the ruff llinter and apply it

weather-server-python/pyproject.toml

@@ -13,6 +13,41 @@ dependencies = [
 requires = [ "hatchling",]
 build-backend = "hatchling.build"
 
+[dependency-groups]
+dev = [
+    "ruff>=0.14.8",
+]
+
 [project.scripts]
 weather = "weather:main"
 
+[tool.ruff]
+line-length = 120
+target-version = "py310"
+extend-exclude = ["README.md"]
+
+[tool.ruff.lint]
+select = [
+    "C4",   # flake8-comprehensions
+    "C90",  # mccabe
+    "E",    # pycodestyle
+    "F",    # pyflakes
+    "I",    # isort
+    "PERF", # Perflint
+    "PL",   # Pylint
+    "UP",   # pyupgrade
+]
+ignore = ["PERF203", "PLC0415", "PLR0402"]
+mccabe.max-complexity = 24 # Default is 10
+
+[tool.ruff.lint.per-file-ignores]
+"__init__.py" = ["F401"]
+"tests/server/fastmcp/test_func_metadata.py" = ["E501"]
+"tests/shared/test_progress_notifications.py" = ["PLW0603"]
+
+[tool.ruff.lint.pylint]
+allow-magic-value-types = ["bytes", "float", "int", "str"]
+max-args = 23                                              # Default is 5
+max-branches = 23                                          # Default is 12
+max-returns = 13                                           # Default is 6
+max-statements = 102                                       # Default is 50

weather-server-python/weather.py

@@ -1,4 +1,5 @@
 from typing import Any
+
 import httpx
 from mcp.server.fastmcp import FastMCP
 
@@ -9,12 +10,10 @@
 NWS_API_BASE = "https://api.weather.gov"
 USER_AGENT = "weather-app/1.0"
 
+
 async def make_nws_request(url: str) -> dict[str, Any] | None:
     """Make a request to the NWS API with proper error handling."""
-    headers = {
-        "User-Agent": USER_AGENT,
-        "Accept": "application/geo+json"
-    }
+    headers = {"User-Agent": USER_AGENT, "Accept": "application/geo+json"}
     async with httpx.AsyncClient() as client:
         try:
             response = await client.get(url, headers=headers, timeout=30.0)
@@ -23,17 +22,19 @@ async def make_nws_request(url: str) -> dict[str, Any] | None:
         except Exception:
             return None
 
+
 def format_alert(feature: dict) -> str:
     """Format an alert feature into a readable string."""
     props = feature["properties"]
     return f"""
-Event: {props.get('event', 'Unknown')}
-Area: {props.get('areaDesc', 'Unknown')}
-Severity: {props.get('severity', 'Unknown')}
-Description: {props.get('description', 'No description available')}
-Instructions: {props.get('instruction', 'No specific instructions provided')}
+Event: {props.get("event", "Unknown")}
+Area: {props.get("areaDesc", "Unknown")}
+Severity: {props.get("severity", "Unknown")}
+Description: {props.get("description", "No description available")}
+Instructions: {props.get("instruction", "No specific instructions provided")}
 """
 
+
 @mcp.tool()
 async def get_alerts(state: str) -> str:
     """Get weather alerts for a US state.
@@ -53,6 +54,7 @@ async def get_alerts(state: str) -> str:
     alerts = [format_alert(feature) for feature in data["features"]]
     return "\n---\n".join(alerts)
 
+
 @mcp.tool()
 async def get_forecast(latitude: float, longitude: float) -> str:
     """Get weather forecast for a location.
@@ -80,18 +82,20 @@ async def get_forecast(latitude: float, longitude: float) -> str:
     forecasts = []
     for period in periods[:5]:  # Only show next 5 periods
         forecast = f"""
-{period['name']}:
-Temperature: {period['temperature']}°{period['temperatureUnit']}
-Wind: {period['windSpeed']} {period['windDirection']}
-Forecast: {period['detailedForecast']}
+{period["name"]}:
+Temperature: {period["temperature"]}°{period["temperatureUnit"]}
+Wind: {period["windSpeed"]} {period["windDirection"]}
+Forecast: {period["detailedForecast"]}
 """
         forecasts.append(forecast)
 
     return "\n---\n".join(forecasts)
 
+
 def main():
     # Initialize and run the server
-    mcp.run(transport='stdio')    
+    mcp.run(transport="stdio")
+
 
 if __name__ == "__main__":
     main()