Python装饰器的两种使用心得

def decorator(func):
 def inner(info):
  print('inner')
  func(info)
 return inner
@decorator
def show_info(info):
 print(info)
show_info('hello')

import functools
def decorator(func):
	@functools.wraps(func)
 def inner(info):
  print('inner')
  func(info)
 return inner
@decorator
def show_info(info):
 print(info)
show_info('hello')

class Commands(object):
 def __init__(self):
  self.cmd = {}
 def regist_cmd(self, name: str) -> None:
  def decorator(func):
self.cmd[name] = func
print('func:',func)
return func
  return decorator
commands = Commands()
# 使得s1的值指向show_h的函数地址
@commands.regist_cmd('s1')
def show_h():
 print('show_h')
# 使得s2的值指向show_e的函数地址
@commands.regist_cmd('s2')
def show_e():
 print('show_e')
func = commands.cmd['s1']
func()

@commands.regist_cmd('s2')
def show_e():
 print('show_e')