Python 两个简单的 decorator 例子

1. 无参 decorator：

def decor(func):
    def wrap():
        print("============")
        func()
        print("============")
    return wrap

def print_text():
    print("Hello world!")

print_text = decor(print_text)
print_text();

2. 带参 decorator：

#your code goes here
def decor(func):
    def wrapped(*args, **kwargs):
        print("***")
        func(*args, **kwargs)
        print("***\nEND OF PAGE")
    return wrapped

@decor
def invoice(num):
    print("INVOICE #" +num)

invoice(input());