Enumming

[Ken Kinder]

There are two schools of thought I've usually seen, yours being the forth.
I've seen a lot of code like this (I'll pick image types for the enum):

    GIF = 1
    JPEG = 2
    PNG = 3
    imagetype = GIF

For a larger program or an API, I would spin off all those constants
(constants by convention, not enforcement) into a module, so you would do
something like

    import imagedefs
    imagetype = imagedefs.GIF

The other school of thought is to just use strings

    imagetype = 'GIF'

Personally, your system of

    GIF, PNG, JPEG = range(3)

seems very reasonable to me.

Larry Whitley wrote:

> I come to Python from C++ and am wondering how Pythoners do the equivalent
> of the C++ enum.  My current approach is to have an enum class with some
> constants in it for use with my regular class.  It there something more
> clever that I've missed?
>
> Let's say I have a list of tuples like so:
>
> myList = []
> for i in range( 10 ):
>     myList.append( functionA(), funcationB(), functionC(), functionD(),
> functionE() )
>
> Here's my class of enums:
>
> class E:
>     a,b,c,d,e = range( 5 )
>
> Later, I use the enums to access my list:
>
> myC = myList[5][ E.c]
>
> Is this the usual approach?
>
> Larry
>
> --
> http://www.python.org/mailman/listinfo/python-list

--
Ken Kinder
Staff Engineer - Tridog Interactive, Inc.
kkinder at tridog.com
http://www.tridog.com/ - 303-415-2538


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