import functools

def annotate(value):

def inner(func):

func.annotation = value

return func

return inner

def wraps1(func):

def wrapper(*args):

res = func(*args)

return res

return wrapper

def wraps2(func):

@functools.wraps(func)

def wrapper(*args):

res = func(*args)

return res

return wrapper

@annotate(100)

def func1():

pass

@wraps1

def func2():

pass

@wraps2

def func3():

pass

func1

func2

func3

#Fancy decorators

def register(name=None):

def decorator(func):

if not callable(func):

raise ValueError("not a callable")

return func

if callable(name):

return decorator(name)

else:

return decorator

@register(17)

def foo():

pass

foo

@register

def bar():

pass

bar()

@register()

def baz():

pass

baz()