Steven D'Aprano wrote:
There's a standard idiom for that, using the property() built-in, for
Python 2.6 or better.
Here's an example including a getter, setter, deleter and doc string,
with no namespace pollution, imports, or helper functions or deprecated
built-ins:
class ColourThing(object):
@property
def rgb(self):
"""Get and set the (red, green, blue) colours."""
return (self.r, self.g, self.b)
@rgb.setter
def rgb(self, rgb):
self.r, self.g, self.b = rgb
@rgb.deleter
def rgb(self):
del self.r, self.g, self.b
Sorry, Steve, but I don't understand this. In fact, I don't even see
how it can be made to work.
Unless an exception is raised,
@wibble
def wobble():
pass
will make an assignment to wobble, namely the return value of wibble.
So in your example above, there will be /three/ assignments to rgb.
Unless you do some complicated introspection (and perhaps not even then)
surely they will clobber each other.
I still prefer:
@wibble.property
def rgb():
'''Red Green Blue color settings (property)'''
def fset(rgb):
self.r, self.g, self.b = rgb
return locals()
--
Jonathan
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