Am 21.01.10 22:51, schrieb Martin Drautzburg:
Thanks for all the answers. Let me summarize
(1) I fail to see the relevance of
>>> def move( direction ):
... print( "move " + str( direction ) )
...
>>> move( "up" )
move up
not only in the context of my question. And I don't see an abuse of the
language either. Maybe this could pass as a Zen Puzzle.
(2) Using enum's was suggested. That is good to know, but again it is
just a way to define constants in the caller's namespace.
(3) Then somone suggested to tie the constants to the function itself,
as in
def move(direction):
print "moving %s" % direction
move.UP = 'up'
move.DOWN = 'down'
This is quite nice. Then again the "move." is just some object which
allows attributes, and which only happens to have the same name as the
function. Well in this case it IS the function, alright, but I could
just as well have used a Class as in
class m: pass
m.UP = 'up'
(4) Finally someone mentioned DSLs. I guess thats absolutely correct.
This is what I am struggeling to achieve. I did a little googling ("how
to write DSLs in python"), but haven't found anything appealing yet.
Any pointers would be appreciated.
(5) Here is something I came up with myself:
def symbols(aDict):
aDict["foo"] = "bar"
def someFunction(aFoo):
print aFoo
symbols(locals())
someFunction (foo) #Eh voila: foo is magically defined
http://docs.python.org/library/functions.html#locals
If it works, it's more an accident than anything else, and can go away
without prior notice.
Diez
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