Well, there are basically two ways to go at it. If you want it at module level, you need to generate the functions:
sensor = {'sens1': 200, 'sens2': 300}
for key in sensor.keys():
def helper(keytofetch=key):
return sensor[keytofetch]
globals()[key] = helper
print sens1()
print sens2()
Alternatively, if you want to stuff into a class, you can do:
class X:
def __init__(self):
self.sensor = {}
def __getattr__(self, key):
return lambda : self.sensor[key]
x=X()
x.sensor = {'sens1': 200, 'sens2': 300}
print x.sens1()
print x.sens2()
print x.test() # => raises KeyError
Andreas
Am Freitag, den 21.03.2008, 22:01 -0400 schrieb Shrutarshi Basu:
> I have a dictionary (in a module) which contains values of various
> sensors. I would like a user to be able use to a function syntax to
> get the sensor values, both as a whole and individually. Currently I
> have a function for each value who's sole purpose is to look up the
> corresponding dict value and return. But I don't think this is an
> elegant way to solve the problem. Is there someway I could define a
> single function that responds to all of possible function calls?
>
> Eg.
> My dict : sensor = {'sens1': 200, 'sens2': 300} etc
> my functions:
> def sens1():
> return sensor['sens1']
> same for sens2.
>
> There are two solutions I've thought about:
> Have a function that takes in the sensor's name as a string and
> responds accordingly. (which might be what I'll end up using)
> I could let the user directly access the dict, but I'm not sure if
> that is a good idea. My project requires that the user of my module
> should not have to know about Python's data structures to use the
> values my module returns. If there is some sort of non-functional
> dot-separated syntax that I could use, that would be good too.
> Thanks,
> Basu
>
signature.asc
Description: Dies ist ein digital signierter Nachrichtenteil
_______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
