MRAB <pyt...@mrabarnett.plus.com> writes:
> On 11/10/2010 15:55, MacOSX @ Rocteur.cc wrote:
>> Hi,
>>
>> Is there an easier way to do this, I am adding/creating to an array
>> inside a dict but can find a cleaner way:
>>
>> So I first check if the key exists already, if it does then I know I use
>> append, if it does not I create it.
>>
>> if osmdict.has_key(token):
>> osmdict[token]['user'].append(user)
>> osmdict[token]['reason'].append(reason)
>> else:
>> osmdict[token] = { 'user' : [user], 'reason' : [reason]}
>>
>> Sorry if I've completely overlooked the obvious,
>>
>> Thanks in advance,
>>
> osmdict.setdefault(token, {}).update({'user': [user], 'reason': [reason]})
The above will overwrite the 'user' and 'reason' items in the osmdict[token]
dictionary if they already exist, which is not what the OP wants.
If osmdict can be a defaultdict you could do:
from collections import defaultdict
osmdict = defaultdict(defaultdict(list))
# Later, simply:
osmdict[token]['user'].append(user)
osmdict[token]['reason'].append(reason)
--
Arnaud
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