Fixed.
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parent
847bb0694e
commit
6cbcb76867
@ -1,4 +1,7 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="ProjectRootManager" version="2" project-jdk-name="Python 3.9 (venv)" project-jdk-type="Python SDK" />
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<component name="PyCharmProfessionalAdvertiser">
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<option name="shown" value="true" />
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</component>
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</project>
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@ -0,0 +1,20 @@
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from fastapi import APIRouter, Depends, HTTPException
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from sqlalchemy.orm import Session
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from typing import List
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from schemas.schemas import LaptopCreate, LaptopResponse, PredictPriceResponse
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from services.service import LaptopService
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import os
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router = APIRouter()
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# Инициализация сервиса
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MODEL_PATH = os.getenv("MODEL_PATH", "laptop_price_model.pkl")
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FEATURE_COLUMNS_PATH = os.getenv("FEATURE_COLUMNS_PATH", "feature_columns.pkl")
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laptop_service = LaptopService(model_path=MODEL_PATH, feature_columns_path=FEATURE_COLUMNS_PATH)
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@router.post("/predict_price/", response_model=PredictPriceResponse)
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def predict_price(data: LaptopCreate):
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try:
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return laptop_service.predict_price(data.dict())
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except Exception as e:
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raise HTTPException(status_code=400, detail=str(e))
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80
main.py
80
main.py
@ -1,79 +1,7 @@
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from fastapi import FastAPI, Depends, HTTPException
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from sqlalchemy.orm import Session
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from typing import List
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from models import Laptop
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from schemas import LaptopCreate, LaptopResponse
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from database import SessionLocal, engine, Base
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from pydantic import BaseModel
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import joblib
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import pandas as pd
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import numpy as np
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# Загрузка модели и списка признаков
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model = joblib.load('laptop_price_model.pkl')
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feature_columns = joblib.load('feature_columns.pkl')
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from fastapi import FastAPI
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from controllers import controller
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app = FastAPI()
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# Определение Pydantic модели для входных данных
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class LaptopData(BaseModel):
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processor: str
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ram: int
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os: str
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ssd: int
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display: float
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def get_db():
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db = SessionLocal()
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try:
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yield db
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finally:
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db.close()
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@app.post("/laptops/", response_model=LaptopResponse)
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def create_laptop(laptop: LaptopCreate, db: Session = Depends(get_db)):
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db_laptop = Laptop(**laptop.dict())
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db.add(db_laptop)
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db.commit()
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db.refresh(db_laptop)
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return db_laptop
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@app.get("/laptops/", response_model=List[LaptopResponse])
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def read_laptops(skip: int = 0, limit: int = 10, db: Session = Depends(get_db)):
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laptops = db.query(Laptop).offset(skip).limit(limit).all()
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return laptops
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@app.get("/laptops/{laptop_id}", response_model=LaptopResponse)
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def read_laptop(laptop_id: int, db: Session = Depends(get_db)):
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laptop = db.query(Laptop).filter(Laptop.id == laptop_id).first()
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if laptop is None:
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raise HTTPException(status_code=404, detail="Laptop not found")
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return laptop
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# Эндпоинт для предсказания цены
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@app.post("/predict_price/")
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def predict_price(data: LaptopData):
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input_data = data.dict()
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# Преобразование данных в DataFrame
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input_df = pd.DataFrame([input_data])
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# Применение One-Hot Encoding к категориальным признакам
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input_df = pd.get_dummies(input_df, columns=['processor', 'os'], drop_first=True)
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# Добавление отсутствующих признаков, если они есть
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for col in feature_columns:
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if col not in input_df.columns and col != 'price':
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input_df[col] = 0
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# Упорядочивание колонок согласно обучающей выборке
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input_df = input_df[feature_columns]
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# Предсказание цены
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predicted_price = model.predict(input_df)[0]
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return {"predicted_price": round(predicted_price, 2)}
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# Подключение маршрутов
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app.include_router(controller.router)
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@ -5,9 +5,8 @@ class Laptop(Base):
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__tablename__ = "laptops"
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id = Column(Integer, primary_key=True, index=True)
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title = Column(String, index=True)
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price = Column(Float)
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processor = Column(String)
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processor = Column(String, index=True)
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ram = Column(Integer)
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os = Column(String, index=True)
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ssd = Column(Integer)
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display = Column(Float)
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@ -0,0 +1,9 @@
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fastapi
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uvicorn
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sqlalchemy
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psycopg2-binary
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pydantic
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joblib
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pandas
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numpy
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python-dotenv
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@ -7,7 +7,7 @@ import joblib
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import re
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# Шаг 1: Загрузка данных
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df = pd.read_csv('laptops.csv')
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df = pd.read_csv('../laptops.csv')
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# Шаг 2: Проверка и очистка имен столбцов
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print("Имена столбцов до очистки:")
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@ -134,10 +134,10 @@ for name, mdl in models.items():
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print(f"{name} - MAE: {mae}, RMSE: {rmse}, R²: {r2}")
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# Шаг 12: Сохранение модели
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joblib.dump(model, 'laptop_price_model.pkl')
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joblib.dump(model, '../laptop_price_model.pkl')
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print("\nМодель сохранена как 'laptop_price_model.pkl'.")
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# Дополнительно: Сохранение колонок, полученных после One-Hot Encoding, для использования в бэкенде
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feature_columns = X.columns.tolist()
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joblib.dump(feature_columns, 'feature_columns.pkl')
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joblib.dump(feature_columns, '../feature_columns.pkl')
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print("Сохранены названия признаков в 'feature_columns.pkl'.")
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import pandas as pd
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import joblib
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from typing import List, Dict
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from schemas.schemas import LaptopCreate, LaptopResponse, PredictPriceResponse
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class LaptopService:
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def __init__(self, model_path: str, feature_columns_path: str):
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try:
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self.model = joblib.load(model_path)
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except FileNotFoundError:
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raise Exception(f"Model file not found at {model_path}")
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except Exception as e:
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raise Exception(f"Error loading model: {str(e)}")
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try:
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self.feature_columns = joblib.load(feature_columns_path)
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except FileNotFoundError:
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raise Exception(f"Feature columns file not found at {feature_columns_path}")
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except Exception as e:
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raise Exception(f"Error loading feature columns: {str(e)}")
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def predict_price(self, data: Dict[str, any]) -> PredictPriceResponse:
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# Преобразование данных в DataFrame
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input_df = pd.DataFrame([data])
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# Применение One-Hot Encoding к категориальным признакам
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input_df = pd.get_dummies(input_df, columns=['processor', 'os'], drop_first=True)
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# Добавление отсутствующих признаков, если они есть
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for col in self.feature_columns:
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if col not in input_df.columns and col != 'price':
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input_df[col] = 0
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# Упорядочивание колонок согласно обучающей выборке
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input_df = input_df[self.feature_columns]
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# Предсказание цены
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predicted_price = self.model.predict(input_df)[0]
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return PredictPriceResponse(predicted_price=round(predicted_price, 2))
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