On Jan 27, 2:48 pm, Wildemar Wildenburger
<[EMAIL PROTECTED]> wrote:
> Diez B. Roggisch wrote:
> > Just for the fun of it, I implemented a decorator:
>
> > from functools import *
> > from inspect import *
>
> > def autoassign(_init_):
> > @wraps(_init_)
> > def _autoassign(self, *args, **kwargs):
> > argnames, _, _, _ = getargspec(_init_)
> > for name, value in zip(argnames[1:], args):
> > setattr(self, name, value)
> > _init_(self, *args, **kwargs)
>
> > return _autoassign
>
> This is neat. :) Could that maybe be extended to only assign selected
> args to the instance and let others pass unchanged. So that, for instance:
>
> @autoassign("foo", "bar")
> def __init__(self, foo, bar, baz):
> super(baz)
>
> ?W
If one goes back to the original idea instead, the decision of using
automatic assignment should depend on the signature of the __init__
function. Here's an implementation (using "_" instead of "." as it
would lead to a syntax error):
from functools import *
from inspect import *
def autoassign(_init_):
@wraps(_init_)
def _autoassign(self, *args, **kwargs):
argnames, _, _, _ = getargspec(_init_)
for name, value in zip(argnames[1:], args):
if name.startswith("_"):
setattr(self, name[1:], value)
_init_(self, *args, **kwargs)
return _autoassign
class Test(object):
@autoassign
def __init__(self, _foo, _bar, baz):
print 'baz =', baz
t = Test(1, 2, 3)
print t.foo
print t.bar
print t.baz
#== the output is
baz = 3
1
2
Traceback (most recent call last):
File "/Users/andre/CrunchySVN/branches/andre/src/tools_2k.py", line
24, in exec_code
exec code in local_dict
File "User's code", line 23, in <module>
AttributeError: 'Test' object has no attribute 'baz'
#======
André
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