first commit

api/routes.py

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+from fastapi import APIRouter
+from new.services.population import get_continent_population
+from new.models.schemas import ContinentPopulationResponse
+
+router = APIRouter()
+
+@router.get("/continent/{continent_name}", response_model=ContinentPopulationResponse)
+def continent_population(continent_name: str):
+    return get_continent_population(continent_name)

logs/app.log

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+import os
+
+# Path to the logs directory
+log_dir = "D:/pydantic/new/logs"
+os.makedirs(log_dir, exist_ok=True)  # Create the folder if it doesn't exist
+2025-02-07 21:06:23,364 - ERROR - Error loading CSV: [Errno 2] No such file or directory: 'data/world_population.csv'
+2025-02-07 21:08:17,879 - INFO - CSV file loaded successfully.
+2025-02-07 21:08:17,915 - INFO - Will watch for changes in these directories: ['D:\\pydantic\\new']
+2025-02-07 21:08:17,920 - INFO - Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
+2025-02-07 21:08:17,923 - INFO - Started reloader process [25348] using WatchFiles
+2025-02-07 21:08:21,018 - INFO - CSV file loaded successfully.
+2025-02-07 21:08:21,030 - INFO - Started server process [37976]
+2025-02-07 21:08:21,039 - INFO - Waiting for application startup.
+2025-02-07 21:08:21,043 - INFO - Application startup complete.
+2025-02-07 21:08:29,496 - INFO - Accessed home endpoint.
+2025-02-07 21:08:47,547 - INFO - Fetching data for continent: Asia
+2025-02-07 21:09:22,367 - INFO - Accessed home endpoint.
+2025-02-07 21:09:49,382 - INFO - 1 change detected
+2025-02-07 21:09:49,760 - INFO - 1 change detected
+2025-02-07 21:10:17,752 - INFO - Shutting down
+2025-02-07 21:10:17,860 - INFO - Waiting for application shutdown.
+2025-02-07 21:10:17,863 - INFO - Application shutdown complete.
+2025-02-07 21:10:17,865 - INFO - Finished server process [37976]
+2025-02-07 21:10:18,297 - INFO - Stopping reloader process [25348]
+2025-02-07 21:10:24,405 - INFO - CSV file loaded successfully.
+2025-02-07 21:10:24,442 - INFO - Will watch for changes in these directories: ['D:\\pydantic\\new']
+2025-02-07 21:10:24,445 - INFO - Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
+2025-02-07 21:10:24,448 - INFO - Started reloader process [27472] using WatchFiles
+2025-02-07 21:10:27,357 - INFO - CSV file loaded successfully.
+2025-02-07 21:10:27,362 - INFO - Started server process [48848]
+2025-02-07 21:10:27,370 - INFO - Waiting for application startup.
+2025-02-07 21:10:27,373 - INFO - Application startup complete.
+2025-02-07 21:32:06,543 - INFO - 1 change detected
+2025-02-07 21:32:06,638 - WARNING - WatchFiles detected changes in 'models\schemas.py'. Reloading...
+2025-02-07 21:32:06,877 - INFO - Shutting down
+2025-02-07 21:32:07,124 - INFO - Waiting for application shutdown.
+2025-02-07 21:32:07,213 - INFO - Application shutdown complete.
+2025-02-07 21:32:07,233 - INFO - Finished server process [48848]
+2025-02-07 21:32:08,725 - INFO - 1 change detected
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+2025-02-07 21:45:10,763 - INFO - CSV file loaded successfully.
+2025-02-07 21:45:10,798 - INFO - Will watch for changes in these directories: ['D:\\pydantic\\new']
+2025-02-07 21:45:10,801 - INFO - Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
+2025-02-07 21:45:10,806 - INFO - Started reloader process [22468] using WatchFiles
+2025-02-07 21:45:13,898 - INFO - CSV file loaded successfully.
+2025-02-07 21:45:13,907 - INFO - Started server process [44660]
+2025-02-07 21:45:13,914 - INFO - Waiting for application startup.
+2025-02-07 21:45:13,923 - INFO - Application startup complete.
+2025-02-07 21:45:19,352 - INFO - Accessed home endpoint.
+2025-02-07 22:41:40,339 - INFO - 1 change detected
+2025-02-07 22:41:40,416 - WARNING - WatchFiles detected changes in 'models\schemas.py'. Reloading...
+2025-02-07 22:41:40,634 - INFO - Shutting down
+2025-02-07 22:41:40,798 - INFO - Waiting for application shutdown.
+2025-02-07 22:41:40,814 - INFO - Application shutdown complete.
+2025-02-07 22:41:40,822 - INFO - Finished server process [44660]
+2025-02-07 22:41:42,236 - INFO - 2 changes detected
+2025-02-07 22:41:42,239 - WARNING - WatchFiles detected changes in 'models\schemas.py'. Reloading...
+2025-02-07 22:41:47,204 - INFO - CSV file loaded successfully.
+2025-02-07 22:41:47,214 - INFO - Started server process [36856]
+2025-02-07 22:41:47,222 - INFO - Waiting for application startup.
+2025-02-07 22:41:47,229 - INFO - Application startup complete.
+2025-02-07 22:41:47,251 - INFO - 5 changes detected
+2025-02-07 22:49:17,706 - INFO - Shutting down
+2025-02-07 22:49:17,861 - INFO - Waiting for application shutdown.
+2025-02-07 22:49:17,872 - INFO - Application shutdown complete.
+2025-02-07 22:49:17,877 - INFO - Finished server process [36856]
+2025-02-07 22:49:18,562 - INFO - Stopping reloader process [22468]
+2025-02-07 22:58:26,778 - INFO - CSV file loaded successfully.
+2025-02-07 22:58:26,816 - INFO - Will watch for changes in these directories: ['D:\\pydantic\\new']
+2025-02-07 22:58:26,820 - INFO - Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
+2025-02-07 22:58:26,823 - INFO - Started reloader process [46736] using WatchFiles
+2025-02-07 22:58:29,766 - INFO - CSV file loaded successfully.
+2025-02-07 22:58:29,772 - INFO - Started server process [22336]
+2025-02-07 22:58:29,780 - INFO - Waiting for application startup.
+2025-02-07 22:58:29,790 - INFO - Application startup complete.
+2025-02-07 22:58:51,417 - INFO - Accessed home endpoint.
+2025-02-07 23:03:00,949 - INFO - Shutting down
+2025-02-07 23:03:01,074 - INFO - Waiting for application shutdown.
+2025-02-07 23:03:01,079 - INFO - Application shutdown complete.
+2025-02-07 23:03:01,083 - INFO - Finished server process [22336]
+2025-02-07 23:03:01,743 - INFO - Stopping reloader process [46736]

main.py

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+from fastapi import FastAPI
+from new.api.routes import router
+from new.utils.logger import logger
+import new
+
+app = FastAPI()
+
+# Include routes
+app.include_router(router)
+
+@app.get("/")
+def home():
+    logger.info("Accessed home endpoint.")
+    return {"message": "Welcome to the World Population API"}

models/schemas.py

@@ -0,0 +1,31 @@
+from pydantic import BaseModel, Field
+
+class CountryPopulation(BaseModel):
+    country: str
+    population: int
+
+class ContinentPopulationResponse(BaseModel):
+    continent: str = Field(..., description="Name of the continent")
+    total_population: int = Field(..., description="Total population of the continent")
+    total_area: int = Field(..., description="Total area of the continent")
+    continent_population_density: float = Field(..., description="Population density of the continent")
+    max_population: CountryPopulation = Field(..., description="Country with the maximum population")
+    min_population: CountryPopulation = Field(..., description="Country with the minimum population")
+    avg_population: int = Field(..., description="Average population of the continent")
+
+    # Schema-level configuration
+    model_config = {
+        "json_schema_extra": {
+            "examples": [
+                {
+                    "continent": "Asia",
+                    "total_population": 4641054775,
+                    "total_area": 44579000,
+                    "continent_population_density": 104.1,
+                    "max_population": {"country": "China", "population": 1411778724},
+                    "min_population": {"country": "Maldives", "population": 521874},
+                    "avg_population": 92821192
+                }
+            ]
+        }
+    }

services/population.py

@@ -0,0 +1,61 @@
+import os
+import sys
+
+src_directory=os.path.abspath(os.path.join(os.path.dirname(__file__),"../..","pydantic"))
+sys.path.append(src_directory)
+
+
+
+import pandas as pd
+from new.utils.logger import logger
+from fastapi import HTTPException
+from new.models.schemas import ContinentPopulationResponse, CountryPopulation
+
+file_path = "D:/pandas/world_population (1).csv"
+
+# Load the CSV file
+try:
+    countries_df = pd.read_csv(file_path)
+    countries_df["Population"] = pd.to_numeric(countries_df["Population"], errors="coerce")
+    countries_df["Area"] = pd.to_numeric(countries_df["Area"], errors="coerce")
+    logger.info("CSV file loaded successfully.")
+except Exception as e:
+    logger.error(f"Error loading CSV: {e}")
+    raise RuntimeError("Failed to load CSV file.")
+
+def get_continent_population(continent_name: str) -> ContinentPopulationResponse:
+    try:
+        logger.info(f"Fetching data for continent: {continent_name}")
+        continent_group = countries_df[countries_df["Continent"] == continent_name].dropna(subset=["Population", "Area"])
+        
+        if continent_group.empty:
+            raise HTTPException(status_code=404, detail="Continent not found.")
+
+        total_population = int(continent_group["Population"].sum())
+        total_area = int(continent_group["Area"].sum())
+        if total_area == 0:
+            raise HTTPException(status_code=400, detail="Total area is zero.")
+
+        max_row = continent_group.loc[continent_group["Population"].idxmax()]
+        min_row = continent_group.loc[continent_group["Population"].idxmin()]
+        avg_population = int(continent_group["Population"].mean())
+
+        return ContinentPopulationResponse(
+            continent=continent_name,
+            total_population=total_population,
+            total_area=total_area,
+            continent_population_density=total_population / total_area,
+            max_population=CountryPopulation(
+                country=max_row["Country"], population=int(max_row["Population"])
+            ),
+            min_population=CountryPopulation(
+                country=min_row["Country"], population=int(min_row["Population"])
+            ),
+            avg_population=avg_population
+        )
+    except HTTPException as http_err:
+        logger.error(f"HTTP exception: {http_err.detail}")
+        raise http_err
+    except Exception as e:
+        logger.error(f"Unexpected error: {e}")
+        raise HTTPException(status_code=500, detail="Internal server error.")

utils/logger.py

@@ -0,0 +1,17 @@
+import logging
+import os
+
+# Ensure the 'logs' directory exists
+log_dir = "D:/pydantic/new/logs"
+os.makedirs(log_dir, exist_ok=True)
+
+# Configure logging
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s - %(levelname)s - %(message)s",
+    handlers=[
+        logging.FileHandler(f"{log_dir}/app.log"),  # Save logs in 'logs/app.log'
+        logging.StreamHandler(),  # Also print logs to console
+    ],
+)
+logger = logging.getLogger(__name__)