[EMAIL PROTECTED] wrote:
> Has anyone else felt a desire for a 'nochange' value
> resembling the 'Z'-state of a electronic tri-state output?
No. but if you must, you can emulate that using properties or
__getattr__/__setattr__- of course then limited to classes, but writen
c.var1 instead of var1 where c is your container - that world work, if
the semantics you need are so commeon it really saves you effort.
class Container(object):
def __init__(self, nc):
"""
@param nc: a list or set of names that should not be
overwritten when None is assigned to them.
"""
self.nochanges = nc
def __setattr__(self, name, value):
if name in self.nochanges and value is not None:
self.__dict__[name] = value
Diez
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