如何创建一个装饰器来记录函数调用的次数？

Question

如何创建一个装饰器来记录函数调用的次数？，不要使用GPT回答

Answer 1

装饰器是一个用于修改或增强函数或类行为的高级Python特性。它们使用@符号来表示。

要创建一个记录函数调用次数的装饰器，可以这样做：

python
def count_calls(func):  
    def wrapper(*args, **kwargs):  
        wrapper.count += 1  
        print(f'Function {func.__name__} has been called {wrapper.count} times.')  
        return func(*args, **kwargs)  
    wrapper.count = 0  
    return wrapper  
  
@count_calls  
def greet(name):  
    print(f'Hello, {name}!')  
  
greet('Alice')  # 输出: Function greet has been called 1 times. Hello, Alice!  
greet('Bob')    # 输出: Function greet has been called 2 times. Hello, Bob!