Edward Loper <edloper at gradient.cis.upenn.edu>:
> On a related note, now that Python has class methods, is there much
> point in a "singleton" pattern? In particular, why not just make a
> class that only defines class methods, and uses the class namespace to
> store variables (instead of an instance namespace)?
Classes do various magic things on attribute lookups that you might
not want for an object that isn't meant to be used as a class.
For a while I've been wondering whether Python should have
an "instance" statement that's analogous to "class" but creates
an instance instead, e.g.
instance fred(Foo):
blarg = 42
def f():
do_something()
would be equivalent to something like
class _fred(Foo):
def f():
do_something()
fred = _fred()
fred.blarg = 42
People working on interactive fiction would love something
like this, I expect.
Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury, | A citizen of NewZealandCorp, a |
Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. |
greg at cosc.canterbury.ac.nz +--------------------------------------+
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