🎨 Decorators

def my_decorator(func):
    def wrapper():
        print("Function se pehle")
        func()
        print("Function ke baad")
    return wrapper

@my_decorator
def say_hello():
    print("Hello! 👋")

say_hello()

import time

def timer(func):
    def wrapper(*args, **kwargs):
        start = time.time()
        result = func(*args, **kwargs)
        end = time.time()
        print(f"Time: {end-start:.4f}s")
        return result
    return wrapper

@timer
def slow_function():
    time.sleep(1)
    print("Done!")

slow_function()

class MathHelper:
    @staticmethod
    def add(a, b):
        return a + b
    
    @classmethod
    def info(cls):
        print(f"Class: {cls.__name__}")

print(MathHelper.add(3, 4))  # 7
MathHelper.info()            # Class: MathHelper

# Chapter 17: Decorators — Advanced Practice
print("=== Decorators Practice ===")

# Example 1: Basic usage
result = "Python mein Decorators bahut powerful hai!"
print(result)

# Example 2: Real world use
data = ["Decorators", "Python", "Hindi", "PythonHindi.in"]
for item in data:
    print(f"Item: {item}")

print("\nPractice complete! Great job! 🎉")

# Chapter 17: Decorators — Advanced Examples
# Yeh code copy karo aur run karo!

# Example 1: Basic concept
print("=== Chapter 17: Decorators ===")

# Example 2: List operations
items = ["Python", "Hindi", "Code", "Practice"]
for i, item in enumerate(items, 1):
    print(f"{i}. {item}")

# Example 3: Dictionary usage
chapter_info = {
    "number": 17,
    "title":  "Decorators",
    "level":  "Intermediate",
    "done":   False
}
for key, value in chapter_info.items():
    print(f"  {key:10}: {value}")

# Example 4: Function
def practice_summary(chapter, completed=False):
    status = "Complete ✅" if completed else "In Progress ⏳"
    return f"Chapter {chapter}: {status}"

print(practice_summary(17))
print(practice_summary(17, True))