[Python-Dev] Re: Extended Function syntax (original) (raw)

Arne Koewing ark@gmx.net
Wed, 29 Jan 2003 18:32:56 +0100

Guido van Rossum <guido@python.org> writes:

However this could work:

class Foo(object): myprop = property: """A computed property on Foo objects.""" def get(self): return ... def set(self, value): ... def delete(self): ... This would call property() with the results of parsing the indented block. Not sure yet this is a good idea, but it could have many other (possibly good, possibly harmful) uses. Funny, I had a vision of something very similar this morning in the shower. :-) The problem is that this is a very radical change to the grammar, and I'm not sure I can rigorously define how the switch from "expression parsing mode" to "block parsing mode" should work.

If we have:

def f(x) [function_that_takes_f]: pass

what about an block-variant:

blockdef my_thing [function_that_takes_dict_of_the_block_definition] ...block...

so we could write: blockdef myprop [property]: def get(self):
return ... def set(self, value): ... def delete(self): ...

(replace blockdef with your favorite new keyword...)