Python function make-up for the make-up artists.

Some ideas how and for what to use function decorator part one:

the problem:

def one( *args, **kwargs ):
    if kwargs['goodone'] == 1:
        return 1
    else:
        return 0

a lot of code rely on exception handling and you must surround it with try catch...

one(123)

will raise KeyError

Do you know the tale: " Ask the lazy man to do work in and he will teach you! " или на български: Накарай мързеливия да работи за да те научи на акъл!

And here decoration or wrap will save us a lot of try-except-try-excpet spaghetti code:

# our reusable error handling function:

def error_handle( args,kwargs,e ):
    print "handling error: ",repr(e)

# the make-up artist: try except python decorator

def try_wrap( func, exception_class, exception_handle ):
    def wrap(*args, **kwargs):
        try:
            return func( *args, **kwargs )
        except exception_class, e:
            return exception_handle(args, kwargs, e )
    return wrap

# apply the make up:
one = try_wrap(one, KeyError, error_handle)

one(123)