Decorators with parameters?

Question

I have a problem with the transfer of variable \'insurance_mode\' by the decorator. I would do it by the following decorator statement:

@execute_complete_rese         


        

Answer 1

I presume your problem is passing arguments to your decorator. This is a little tricky and not straightforward.

Here's an example of how to do this:

class MyDec(object):
    def __init__(self,flag):
        self.flag = flag
    def __call__(self, original_func):
        decorator_self = self
        def wrappee( *args, **kwargs):
            print 'in decorator before wrapee with flag ',decorator_self.flag
            original_func(*args,**kwargs)
            print 'in decorator after wrapee with flag ',decorator_self.flag
        return wrappee

@MyDec('foo de fa fa')
def bar(a,b,c):
    print 'in bar',a,b,c

bar('x','y','z')

Prints:

in decorator before wrapee with flag  foo de fa fa
in bar x y z
in decorator after wrapee with flag  foo de fa fa

See Bruce Eckel's article for more details.