日志

日志是装饰器运用的另一个亮点。这是个例子：

from functools import wraps
def logit(func):
    @wraps(func)
    def with_logging(*args, **kwargs):
        print(func.__name__ + " was called")
        return func(*args, **kwargs)
    return with_logging
@logit
def addition_func(x):
   """Do some math."""
   return x + x
result = addition_func(4)
# Output: addition_func was called

我敢肯定你已经在思考装饰器的一个其他聪明用法了。