Python's Decorator

Adorner:

1 Import Time2 defcal (L):3Start_time=time.time ()4res=05      forIinchL:6Time.sleep (0.1)7res+=I8Stop_time =time.time ()9     Print('the run time of the function is%s'% (stop_time-start_time))Ten     returnRes One  A Print(Cal (range (100)))

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Decorator preview:

1 Import Time2 defTimmer (func):3     defWrapper (*args,**Kwargs):4Start_time=time.time ()5Res=func (*args,**Kwargs)6Stop_time =time.time ()7         Print('function run time is%s'% (stop_time-start_time))8         returnRes9     returnwrapperTen @timmer One defcal (L): Ares=0 -      forIinchL: -Time.sleep (0.1) theres+=I -     returnRes -  -Res=cal (Range (10)) + Print(RES)

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Higher order functions:

1. The parameter received by the function is a functional name
2. The return value of a function is a functional name
3. Any one of the above conditions can be called the higher order function

　　

Python's Decorator