[Python-ideas] Allow lambda decorators

Lie Ryan lie.1296 at gmail.com
Mon Feb 9 13:44:20 CET 2009

On Sun, 08 Feb 2009 18:08:25 -1000, Carl Johnson wrote:


I can't really comprehend the feature you're describing (TLDR), but 
knowing that decorator is merely a syntax sugar for function calling to a 

def func(foo): pass

is equal to

def func(foo): pass
func = lambdafunc(func)

why don't you do this instead:

lambdafunc(lambda foo: -foo)

it is perfectly readable and is a more functional approach than decorator.

Also for the first example you gave:

>>> def func_maker():
...     fs = []
...     for i in range(10):
...         def f():
...             return i
...         fs.append(f)
...     return fs

why not? (untested)

>>> from functools import partial
>>> def func_maker():
...     def f(j):
...         return j
...     fs = []
...     for i in range(10):
...         fs.append(partial(f, i))         
...     return fs

Closure is already confusing enough for most people. Dynamic creation of 
closure, which is allowed because of python's way of defining function is 
an abuse of closure IMHO.

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