a general python decorator implementation template

decorator_template.py

def decorator(function):
      ''' A general decorator implementation 
      author : cn.haochen@gmail.com '''

      def wraper(*arg,**kargs):
          ''' actual function logic here '''
          # more codes here
          # ...

          # if calling original function here then the code defined in original function will run
          # else just run the code above
          function(*arg,**kargs)

     # must return function finally else NoneType object is not callable 
     return wraper

usage_demo.py

@decorator # used here
def original_func(*arg,**kargs):
     # original function code here