装饰器
最后更新于：2022-04-02 02:17:41
```
def log(f):
def fn(*args, **kw):
print('call ' + f.__name__ + '()...') # 真正需要添加的功能
return f(*args, **kw)
return fn
@log
def factorial(n):
from functools import reduce
return n**2
print(factorial(10))
# call factorial()...
# 3628800
```
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