Issue 2502: Add enum() example for named tuples (original) (raw)

Created on 2008-03-28 11:05 by calvin, last changed 2022-04-11 14:56 by admin. This issue is now closed.

Messages (5)
msg64627 - (view)	Author: Bastian Kleineidam (calvin)	Date: 2008-03-28 11:05
Named tuples can also be used to emulate enum datatypes. The patch adds an example to the documentation.
msg64629 - (view)	Author: Bastian Kleineidam (calvin)	Date: 2008-03-28 11:22
The motivation for this patch is that documenting a single function adding enum-like capabilities would hopefully eliminate the numerous "enum" recipies already out there, each handling things a little different.
msg64635 - (view)	Author: Georg Brandl (georg.brandl) *	Date: 2008-03-28 12:58
Fixed example (a * was missing) and committed as r62007. Thanks!
msg64636 - (view)	Author: Amaury Forgeot d'Arc (amaury.forgeotdarc) *	Date: 2008-03-28 13:05
Raymond, is this kind of recipes worth adding to the 'collections' module? Maybe with the following form: def enum(*valuenames): return namedtuple('Enum', valuenames)(*range(len(valuenames)))
msg64689 - (view)	Author: Raymond Hettinger (rhettinger) *	Date: 2008-03-29 09:58
Thanks for asking. This should not go into the collections module. The concept makes more sense in statically compiled languages. In Python, we typically write something like "RED, ORANGE, YELLOW = range (3)" at the module level. That is faster and still allows prefixing using the module name (for example, re.MULTILINE).