Callback function in Python class and decorator in class

Quickly understand callback functions and decorators

• • One 、 Class
  • Two 、 Decorator in class

One 、 Class

class fruits():
def apple(self,name):
print(" I am a %s"%(name))
def method(self,name,func):
return func(name)
def main(self):
return self.method(" Red apple ",self.apple)
fruits().main()

The key lies in method() Method func() It is already instantiated , So we can't add self

Two 、 Decorator in class

from datetime import datetime
class fruits():
def method(f):
def x(self,*args,**kwargs):
print(datetime.now())
f(self,*args,**kwargs)
return;
return x
@method
def apple(self,name):
print(" I am a %s"%(name))
fruits().apple(" green apple ")