إتقان Python2026
من الصفر للاحتراف

# تحقق من التثبيت
python --version        # Python 3.12.x
pip --version           # pip 24.x
python -c "print('مرحباً Python')"

python -m venv venv
venv\Scripts\activate       # Windows
source venv/bin/activate     # Mac/Linux
pip install requests
pip freeze > requirements.txt

git init
git add .
git commit -m "first commit"
git remote add origin [url]
git push -u origin main

age: int = 25
salary: float = 8500.0
name: str = "أنس"
active: bool = True
print(type(age))    # <class 'int'>
print(float(age))   # 25.0

name = "  أنس اللهيبي  "
print(name.strip())       # 'أنس اللهيبي'
score = 95.5
print(f"الدرجة: {score:.1f}%")

import random
secret = random.randint(1, 100)
while True:
    guess = int(input("خمّن: "))
    match True:
        case _ if guess == secret: print("✅ صح!"); break
        case _ if guess < secret: print("⬆️ أكبر")
        case _: print("⬇️ أصغر")

def calculate_vat(price: float,
                  rate: float = 0.15) -> dict:
    """احسب ضريبة القيمة المضافة السعودية"""
    vat = price * rate
    return {"price": price, "vat": vat,
            "total": price + vat}

import logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s %(levelname)s %(message)s')
try:
    r = 10 / 0
except ZeroDivisionError:
    logging.error("لا يمكن القسمة على صفر!")

import re
def validate_saudi_phone(phone: str) -> bool:
    return bool(re.match(r'^(05|5)[0-9]{8}$', phone))
print(validate_saudi_phone("0512345678")) # True

scores: list[int] = [85,92,61,78,95]
passed = [s for s in scores if s >= 70]
grade = ["A" if s>=90 else "B" if s>=80
         else "C" for s in scores]
name, age, city = ("أنس", 30, "المدينة")

import json
from pathlib import Path
db = Path("data/users.json")
db.parent.mkdir(exist_ok=True)
data = json.loads(db.read_text(encoding="utf-8"))
db.write_text(json.dumps(data, ensure_ascii=False, indent=2))

class Product:
    _count: int = 0
    def __init__(self, name:str, price:float) -> None:
        self.name = name; self.price = price
        Product._count += 1
    def __str__(self) -> str:
        return f"{self.name}: {self.price:,.2f} ريال"

from dataclasses import dataclass, field
@dataclass
class Employee:
    name:   str
    salary: float
    skills: list[str] = field(default_factory=list)
    def __post_init__(self) -> None:
        if self.salary < 0:
            raise ValueError("الراتب لا يمكن أن يكون سالباً")

import time
from functools import wraps
from typing import Callable, Any

def timer(func: Callable) -> Callable:
    @wraps(func)
    def wrapper(*args: Any, **kw: Any) -> Any:
        t = time.perf_counter()
        r = func(*args, **kw)
        print(f"⏱ {func.__name__}: {time.perf_counter()-t:.4f}s")
        return r
    return wrapper

# .env — لا يُرفع على GitHub أبداً!
API_KEY=sk-abc123secret

# config.py
from dotenv import load_dotenv
import os
load_dotenv()
API_KEY: str = os.getenv("API_KEY", "")
if not API_KEY:
    raise ValueError("API_KEY غير موجود في .env")

from fastapi import FastAPI
from pydantic import BaseModel
app = FastAPI(title="Tasks API")
class Task(BaseModel):
    title: str
    done:  bool = False
tasks: list[Task] = []
@app.post("/tasks", status_code=201)
async def create(t: Task) -> Task:
    tasks.append(t); return t