Question

I have a static class that has a method hello. I want to run the decorator method bar before hello. However, using the following code I always get a “name ‘bar’ is not defined” error. Does anyone know what’s going on? Thanks!

class foo():
    @staticmethod
    @bar
    def hello():
        print "hello"

    def bar(fn):
        def wrapped():
            print "bar"
            return fn()
        return wrapped

foo.hello()

Answer 1

Because it’s not defined yet. Besides, that decorator shouldn’t be a method at all.

def bar(fn):
    # ...

class foo(object):
    @staticmethod
    @bar
    def hello():
        # ...

# ...

Also, don’t use static methods, unless you really know what you’re doing. Make it a free function instead.