Lie Ryan <lie.1...@gmail.com> wrote:
> Simplicity is one, using @decor() means you have at least three-level
> nested functions, which means the code is likely to be very huge and
> perhaps unnecessarily.
>
If you don't like the extra level of function nesting that you get from
returning a decorator factory instead of a decorator then you can factor
out the complexity by using a decorator.
---------------------------------------------
from functools import wraps
def decorator_with_args(deco):
"""Wrap a decorator so that it can take arguments"""
@wraps(deco)
def wrapper(*args, **kw):
@wraps(deco)
def inner(f):
return deco(f, *args, **kw)
return inner
return wrapper
@decorator_with_args
def repeat(f, count=2):
"""Decorator which calls the decorated function <count> times"""
@wraps(f)
def wrapper(*args, **kw):
return [f(*args, **kw) for i in range(count)]
return wrapper
@repeat(3)
def ticker(msg):
print("tick", msg)
ticker("tock")
-----------------------------------------
decorator_with_args is a decorator factory that creates a decorator
factory from a decorator and passes its arguments through to the
underlying decorator.
--
Duncan Booth http://kupuguy.blogspot.com
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