efficient updating of nested dictionaries

[Duncan Booth]

Josiah Carlson <jcarlson at nospam.uci.edu> wrote in 
news:bv2e21$j5e$2 at news.service.uci.edu:

>> Although, that's probably kind of lame - I bet others will have much
>> better suggestions. I'm interested in how other people do this too.
>> Rich
> 
> String concatenation is not that lame, but I'd use tuples:
> MY_DICT[(KEY_X, KEY_Y, KEY_Z)] = FOO
> 
> Tuples save on string operations.

I would omit the extra parentheses here, but its a style thing.

   MY_DICT[KEY_X, KEY_Y, KEY_Z] = FOO

(Note to original poster: I'd also turn off caps-lock)