Tricks to do "enums"?
Neil Schemenauer
nascheme at enme.ucalgary.ca
Mon May 8 04:07:53 EDT 2000
Courageous <jkraska1 at san.rr.com> wrote:
>So, it would appear that the limit would be uneval'd
>strings, potentially taken from the user or a file.
Yes:
>>> a = "a"
>>> b = raw_input()
a
>>> a is b
0
>>> a == b
1
>>> b = intern(b)
>>> a is b
1
Trying to figure out when Python shares immutable objects can be
a lot of fun:
>>> a = 1
>>> b = 1
>>> a is b
1
>>> a = 1000
>>> b = 1000
>>> a is b
0
>>> 1000 is 1000
1
>This isn't something c or c++ can do for you, either.
No. I think the idea comes from Lisp. I don't think Guido is a
big Lisp user so the idea may have come from somewhere else.
Lisp has a function called intern though so the connection seems
pretty strong.
Neil
--
The short in SHARE_SHORTS_STRINGS is pretty short otherwise
things would be even more fun.
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