changed folder structure

backend/backend.log

@@ -0,0 +1,145 @@
+2025-02-07 18:42:30,039 - ERROR - Error loading CSV file: [Errno 2] No such file or directory: 'Backend/Data/world_population.csv'
+2025-02-07 18:44:09,012 - ERROR - Error loading CSV file: [Errno 2] No such file or directory: 'backend/Data/world_population.csv'
+2025-02-07 18:46:51,355 - INFO - CSV file loaded successfully.
+2025-02-07 18:46:51,441 - INFO - Data processing completed.
+2025-02-07 18:46:51,500 - INFO - Starting FastAPI application...
+2025-02-07 18:46:51,618 - INFO - Will watch for changes in these directories: ['C:\\chitu\\population_api\\backend']
+2025-02-07 18:46:51,640 - INFO - Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
+2025-02-07 18:46:51,660 - INFO - Started reloader process [6252] using WatchFiles
+2025-02-07 18:46:56,484 - INFO - 1 change detected
+2025-02-07 18:46:59,287 - INFO - CSV file loaded successfully.
+2025-02-07 18:46:59,337 - INFO - Data processing completed.
+2025-02-07 18:46:59,385 - INFO - Starting FastAPI application...
+2025-02-07 18:46:59,388 - INFO - Started server process [10616]
+2025-02-07 18:46:59,412 - INFO - Waiting for application startup.
+2025-02-07 18:46:59,419 - INFO - Application startup complete.
+2025-02-07 18:47:28,558 - INFO - Home endpoint accessed
+2025-02-07 18:48:41,054 - INFO - 1 change detected
+2025-02-07 18:48:41,431 - INFO - 1 change detected
+2025-02-07 18:48:41,821 - INFO - 1 change de
+2025-02-07 18:59:13,483 - INFO - CSV file loaded successfully.
+2025-02-07 18:59:13,532 - INFO - Data processing completed.
+2025-02-07 18:59:13,582 - INFO - Starting FastAPI application...
+2025-02-07 18:59:14,078 - INFO - Will watch for changes in these directories: ['C:\\chitu\\population_api\\backend']
+2025-02-07 18:59:14,100 - INFO - Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
+2025-02-07 18:59:14,111 - INFO - Started reloader process [12852] using WatchFiles
+2025-02-07 18:59:20,971 - INFO - CSV file loaded successfully.
+2025-02-07 18:59:21,021 - INFO - Data processing completed.
+2025-02-07 18:59:21,067 - INFO - Starting FastAPI application...
+2025-02-07 18:59:21,070 - INFO - Started server process [2820]
+2025-02-07 18:59:21,090 - INFO - Waiting for application startup.
+2025-02-07 18:59:21,100 - INFO - Application startup complete.
+2025-02-07 18:59:38,200 - INFO - Fetching list of continents.
+2025-02-07 18:59:38,203 - INFO - Fetching all continents.
+2025-02-07 18:59:45,760 - INFO - 1 change detected
+2025-02-07 18:59:46,134 - INFO - 1 change detected
+2025-02-07 18:59:46,569 - INFO - 1 change detected
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+2025-02-07 19:00:00,304 - INFO - 1 change detected
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+2025-02-07 19:00:11,036 - INFO - 1 change detected
+2025-02-07 19:00:11,452 - INFO - 1 change detected
+2025-02-07 19:00:11,466 - INFO - Shutting down
+2025-02-07 19:00:11,573 - INFO - Waiting for application shutdown.
+2025-02-07 19:00:11,579 - INFO - Application shutdown complete.
+2025-02-07 19:00:11,584 - INFO - Finished server process [2820]
+2025-02-07 19:00:12,039 - INFO - Stopping reloader process [12852]
+2025-02-07 19:09:32,030 - INFO - CSV file loaded successfully.
+2025-02-07 19:09:32,078 - INFO - Data processing completed.
+2025-02-07 19:10:01,801 - INFO - CSV file loaded successfully.
+2025-02-07 19:10:01,843 - INFO - Data processing completed.
+2025-02-07 19:10:25,356 - INFO - CSV file loaded successfully.
+2025-02-07 19:10:25,421 - INFO - Data processing completed.
+2025-02-07 19:10:25,514 - INFO - Starting FastAPI application...
+2025-02-07 19:10:25,673 - INFO - Will watch for changes in these directories: ['C:\\chitu\\population_api\\backend']
+2025-02-07 19:10:25,692 - INFO - Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
+2025-02-07 19:10:25,708 - INFO - Started reloader process [9352] using WatchFiles
+2025-02-07 19:10:32,520 - INFO - CSV file loaded successfully.
+2025-02-07 19:10:32,593 - INFO - Data processing completed.
+2025-02-07 19:10:32,665 - INFO - Starting FastAPI application...
+2025-02-07 19:10:32,667 - INFO - Started server process [3260]
+2025-02-07 19:10:32,683 - INFO - Waiting for application startup.
+2025-02-07 19:10:32,690 - INFO - Application startup complete.
+2025-02-07 19:12:15,266 - INFO - Fetching all continents
+2025-02-07 19:12:15,268 - INFO - Fetching all continents.
+2025-02-07 19:12:31,421 - INFO - Fetching all continents
+2025-02-07 19:12:31,431 - INFO - Fetching all continents.
+2025-02-07 19:14:56,183 - INFO - 1 change detected
+2025-02-07 19:15:06,615 - INFO - 3 changes detected
+2025-02-07 19:15:29,952 - INFO - 1 change detected
+2025-02-07 19:15:29,965 - WARNING - WatchFiles detected changes in 'population_pandas.py'. Reloading...
+2025-02-07 19:15:30,127 - INFO - Shutting down
+2025-02-07 19:15:30,253 - INFO - Waiting for application shutdown.
+2025-02-07 19:15:30,259 - INFO - Application shutdown complete.
+2025-02-07 19:15:30,268 - INFO - Finished server process [3260]
+2025-02-07 19:15:31,437 - INFO - 1 change detected
+2025-02-07 19:15:37,840 - INFO - 5 changes detected
+2025-02-07 19:15:40,666 - INFO - CSV file loaded successfully.
+2025-02-07 19:15:40,742 - INFO - Data processing completed.
+2025-02-07 19:15:40,810 - INFO - Starting FastAPI application...
+2025-02-07 19:15:40,816 - INFO - Started server process [12804]
+2025-02-07 19:15:40,848 - INFO - Waiting for application startup.
+2025-02-07 19:15:40,856 - INFO - Application startup complete.
+2025-02-07 19:16:31,840 - INFO - Shutting down
+2025-02-07 19:16:31,950 - INFO - Waiting for application shutdown.
+2025-02-07 19:16:31,955 - INFO - Application shutdown complete.
+2025-02-07 19:16:31,960 - INFO - Finished server process [12804]
+2025-02-07 19:16:32,433 - INFO - Stopping reloader process [9352]

backend/logger.py

@@ -0,0 +1,16 @@
+import logging
+
+# Configure logging settings
+logging.basicConfig(
+    format="%(asctime)s - %(levelname)s - %(message)s",
+    level=logging.INFO,
+    handlers=[
+        logging.FileHandler("backend.log"),  # Save logs to a file
+        logging.StreamHandler()  # Print logs to the console
+    ]
+)
+
+logger = logging.getLogger(__name__)
+
+if __name__ == "__main__":
+    logger.info("Logger is set up correctly!")

backend/main.py

@@ -0,0 +1,16 @@
+from fastapi import FastAPI
+from backend.routes.continents import router
+from backend.logger import logger
+from backend.routes.continents import router
+
+app = FastAPI()
+
+# Include API routes
+app.include_router(router)
+
+logger.info("Starting FastAPI application...")
+
+@app.get("/")
+def home():
+    logger.info("Home endpoint accessed")
+    return {"message": "Welcome to the World Population API"}

backend/models/population_models.py

@@ -0,0 +1,28 @@
+from pydantic import BaseModel, Field
+from typing import List, Union
+
+class ContinentBase(BaseModel):
+    continent: str = Field(..., title="Continent Name", example="Asia")
+
+class ContinentStats(BaseModel):
+    Total_Countries: int = Field(..., title="Total Number of Countries", example=48)
+    Total_Population: int = Field(..., title="Total Population", example=4600000000)
+    Average_Population: float = Field(..., title="Average Population Per Country", example=96000000)
+    Total_Area: int = Field(..., title="Total Land Area (sq km)", example=44679000)
+    max_population: int = Field(..., title="Highest Country Population", example=1400000000)
+    min_population: int = Field(..., title="Lowest Country Population", example=100000)
+    Country_Max_Population: str = Field(..., title="Country with Highest Population", example="China")
+    Country_Min_Population: str = Field(..., title="Country with Lowest Population", example="Maldives")
+    Population_Density: float = Field(..., title="Population Density (people/sq km)", example=103)
+
+class ContinentResponse(BaseModel):
+    continent: str = Field(..., title="Continent Name", example="Asia")
+    statistics: ContinentStats
+
+class ContinentsListResponse(BaseModel):
+    continents: List[str] = Field(..., title="List of Continents", example=["Asia", "Europe", "Africa"])
+
+class StatResponse(BaseModel):
+    stat: str = Field(..., title="Statistic Name", example="Total Population")
+    value: Union[str, int, float] = Field(..., title="Statistic Value", example=4600000000)
+

population_pandas.py → backend/population_pandas.py

@@ -1,8 +1,13 @@
 import pandas as pd
-from fastapi import FastAPI, HTTPException
+# from backend.population_pandas import get_continents, get_continent_data
+from backend.logger import logger
 
-app = FastAPI()
-df = pd.read_csv("world_population.csv")
+# Load the dataset
+try:
+    df = pd.read_csv("data/world_population.csv")
+    logger.info("CSV file loaded successfully.")
+except Exception as e:
+    logger.error(f"Error loading CSV file: {e}")
 
 # Aggregate the data
 continent_stats = df.groupby("Continent").agg(
@@ -21,31 +26,20 @@ continent_stats["Population_Density"] = (
     continent_stats["Total_Population"] / continent_stats["Total_Area"]
 )
 
+logger.info("Data processing completed.")
 
-@app.get("/")
-def home():
-    return {"message": "Welcome to the home page"}
+def get_continents():
+    """Returns a list of all continents."""
+    logger.info("Fetching all continents.")
+    return continent_stats["Continent"].tolist()
 
-@app.get("/continents/")
-def get_all_continents():
-    continents = continent_stats["Continent"].tolist()
-    return {"continents": continents}
-
-@app.get("/continents/{continent}/")
-def get_continent_stats(continent: str, stat: str = None):
-    # Filter the dataframe for the given continent
+def get_continent_data(continent):
+    """Returns statistics for a specific continent."""
+    logger.info(f"Fetching data for continent: {continent}")
     result = continent_stats[continent_stats["Continent"] == continent].squeeze()
-    print(result)
-    print(type(result))
-
-    # Convert row to a dictionary
-    result = result.to_dict()
-    print(result)
 
-    if stat:
-        if stat in result:  # Check if the requested stat is valid
-            return {stat: result[stat]}
-        else:
-            raise HTTPException(status_code=400, detail="Invalid statistic requested")
+    if result.empty:
+        logger.warning(f"No data found for continent: {continent}")
+        return {}
 
-    return result  
+    return result.to_dict()

backend/routes/continents.py

@@ -0,0 +1,34 @@
+from fastapi import APIRouter, HTTPException
+from backend.population_pandas import get_continents, get_continent_data
+from backend.models.population_models import ContinentResponse, ContinentsListResponse, StatResponse
+from backend.logger import logger  # Import the logger
+
+router = APIRouter()
+
+@router.get("/continents/", response_model=ContinentsListResponse)
+def get_all_continents():
+    """Fetch the list of all continents."""
+    logger.info("Fetching all continents")
+    return {"continents": get_continents()}
+
+@router.get("/continents/{continent}/", response_model=ContinentResponse | StatResponse)
+def get_continent_stats(continent: str, stat: str = None):
+    """Fetch statistics for a specific continent."""
+    logger.info(f"Fetching statistics for continent: {continent}, stat: {stat}")
+
+    continent_data = get_continent_data(continent)
+
+    if not continent_data:
+        logger.error(f"Continent not found: {continent}")
+        raise HTTPException(status_code=404, detail="Continent not found")
+
+    if stat:
+        if stat in continent_data:
+            logger.info(f"Returning stat {stat} for {continent}")
+            return {"stat": stat, "value": continent_data[stat]}
+        else:
+            logger.warning(f"Invalid stat requested: {stat}")
+            raise HTTPException(status_code=400, detail="Invalid statistic requested")
+
+    logger.info(f"Successfully fetched data for {continent}")
+    return {"continent": continent, "statistics": continent_data}