George Sakkis wrote:
+0.x for a new keyword that adds dynamic semantics (and removes the need for the sentinel kludge).
We don't need new syntax for it. Here's a proof-of-concept hack that you can do it with a function decorator.
import copy
def clone_arguments(f): default_args = list(f.func_defaults) if len(default_args) < f.func_code.co_argcount: delta = f.func_code.co_argcount - len(default_args) default_args = ([None] * delta) + default_args def fn(*args): if len(args) < default_args: args = args + tuple(copy.deepcopy(default_args[len(args):])) return f(*args)
return fn
@clone_arguments def thing_taking_array(a, b = []): b.append(a) return b
print thing_taking_array('123') print thing_taking_array('abc')
-1 on changing Python one iota for this,
/larry/