Ralf W. Grosse-Kunstleve wrote in
news:[EMAIL PROTECTED] in
comp.lang.python:
> Does anyone know if there is a way to hide the _ or self_ from the
> user of the class, i.e. given:
>
> class foo(object):
> @attribute_decorator
> def __init__(self, x, _y, z):
> pass
>
> can we make it such that the user can still write
>
> foo(x=1,y=2,z=3)
>
> without the underscore?
>
<light-goes-on/>
Sorry I didn't understand what you ment before:
def init_self( init ):
class KeywordArgumentError(Exception):
pass
vn = init.func_code.co_varnames[ 1 : init.func_code.co_argcount ]
def decorated_init(self, *args, **kw):
off = 0
for name in vn:
if not name.startswith('_'):
if name in kw:
value = kw[name]
else:
value = args[off]
off += 1
setattr( self, name, value )
else:
off += 1 #was missing (a bug) in last version.
if name in kw:
raise KeywordArgumentError(
"Use %s not %s" % (name[1:],name)
)
if name[1:] in kw:
kw[name] = kw[name[1:]]
del kw[name[1:]]
init( self, *args, **kw )
return decorated_init
class MyClass(object):
@init_self
def __init__( self, x, _y, z ):
print "in __init__() _y =", _y
def show( self ):
for i in self.__dict__:
print 'self.%s = %d' %(i,eval('self.%s' % (i,)))
MyClass( 1, 2, 3 ).show()
MyClass( z = 1, x = 2, y = 3 ).show()
MyClass( z = 1, x = 2, _y = 3 ).show()
Rob.
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