What are some real-world examples of decorators in Python?

What are some real-world examples of decorators in Python?

Decorators in Python are a powerful tool for modifying the behavior of functions or methods. For example, a common use is for logging, where a decorator can log the execution time of a function.

Can you give me a specific code example of a logging decorator?

Sure! Here's a simple logging decorator:

import time

def log_execution_time(func):
    def wrapper(*args, **kwargs):
        start_time = time.time()
        result = func(*args, **kwargs)
        end_time = time.time()
        print(f"{func.__name__} executed in {end_time - start_time} seconds")
        return result
    return wrapper

@log_execution_time
def my_function():
    time.sleep(1)
    print("Function is running")

my_function()

What other types of decorators are commonly used?

Other common decorators include authentication decorators for web applications, caching decorators to store results of expensive function calls, and validation decorators to check input parameters.

How do decorators affect performance?

Decorators can impact performance depending on their implementation. For instance, logging decorators may add overhead due to additional processing, while caching decorators can improve performance by reducing redundant computations.