How to deal with optional argument evaluation

[Rodrick Brown]

I'm having a hard time dealing with the following scenario

My class takes a hash like the following:
rdargs =
{'env:'prod','feed':'opra','hostname':'host13dkp1','process':'delta','side':'a','zone','ny'}

All the keys in this hash can be optional.

I'm having a hard time dealing with all 36 possible combinations and I dont
want to use a monstorous if not and else or etc... to evaluate all possible
combinations before I call my search routine.

How do others deal with situations like this? And have it look readable?

if someone supplies just a host and side my search can return 400 responses,
if they supply all 6 elements it can return just 1-5 matches.

class RD(object):
   def __init__(self,**kwargs):
   self.value = 0
   #for field in ('env', 'side', 'zone', 'feed', 'hostname', 'process',
'status'):
   #val = kwargs[field] if kwargs.has_key(field) else False
   #setattr(self, field, val)
   self.env = kwargs.get('env',False)
   self.side = kwargs.get('side',False)
   self.zone = kwargs.get('zone',False)
   self.feed = kwargs.get('feed',False)
   self.hostname = kwargs.get('hostname',False)
   self.process = kwargs.get('process',False)
   self.status = kwargs.get('status',False)

-- 
[ Rodrick R. Brown ]
http://www.rodrickbrown.com http://www.linkedin.com/in/rodrickbrown
-- 
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Re: How to deal with optional argument evaluation

[Ethan Furman]

Rodrick Brown wrote:

I'm having a hard time dealing with the following scenario
 
My class takes a hash like the following:
rdargs = 
{'env:'prod','feed':'opra','hostname':'host13dkp1','process':'delta','side':'a','zone','ny'}
 
All the keys in this hash can be optional.
 
I'm having a hard time dealing with all 36 possible combinations and I 
dont want to use a monstorous if not and else or etc... to evaluate all 
possible combinations before I call my search routine.
 
How do others deal with situations like this? And have it look readable?
 
if someone supplies just a host and side my search can return 400 
responses, if they supply all 6 elements it can return just 1-5 matches.


class RD(object):
   def __init__(self,**kwargs):
   self.value = 0
   #for field in ('env', 'side', 'zone', 'feed', 'hostname', 
'process', 'status'):

   #val = kwargs[field] if kwargs.has_key(field) else False
   #setattr(self, field, val)
   self.env = kwargs.get('env',False)
   self.side = kwargs.get('side',False)
   self.zone = kwargs.get('zone',False)
   self.feed = kwargs.get('feed',False)
   self.hostname = kwargs.get('hostname',False)
   self.process = kwargs.get('process',False)
   self.status = kwargs.get('status',False)


class RD(object):
def __init__(
self,
env=False,
side=False,
zone=False,
feed=False,
hostname=False,
process=False,
status=False
):
self.env = env
self.side = side
self.zone = zone
self.feed = feed
self.hostname = hostname
self.process = process
self.status = status

What does the code look like that actually uses this information?

~Ethan~
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