dict indexed by lists - ?

Alexander Zatvornitskiy · *nix forums beginner Joined: 03 Mar 2005 Posts: 20

ðÒÉ×ÅÔ All!

04 ÆÅ×ÒÁÌÑ 2005 × 02:47, Alexander Zatvornitskiy × Ó×ÏÅÍ ÐÉÓØÍÅ Ë All ÐÉÓÁÌ:
AZ> I'am trying to make something like this:
AZ> CPT={ ['b0','c0']:1, ['b0','c1']:0, ['b1','c0']:3, ['b1','c1']:1 }

Thanks, I fix it - i use lists.

AZ> and, later, modifying it like this:
AZ> key[2]=up.next_state()

replaced with:
k=k[:cur_idx-1]+up.next_state()+k[cur_id+1:]

AZ> ...
AZ> print CPT[key]

AZ> Any suggestions?

AZ> Alexander, zatv@bk.ru

Alexander, zatv@bk.ru

Steven Bethard · *nix forums Guru Joined: 20 Feb 2005 Posts: 773

Alexander Zatvornitskiy wrote:

Alexander Zatvornitskiy · *nix forums beginner Joined: 03 Mar 2005 Posts: 20

Hello All!

I'am trying to make something like this:

CPT={ ['b0','c0']:1, ['b0','c1']:0, ['b1','c0']:3, ['b1','c1']:1 }

but python says "TypeError: list objects are unhashable"

I can replace list with touple: CPT={ ('b0','c0'):1, ('b0','c1'):0, ...and so
on. But, where is one problem: indexes (or, more precisely, keys) are generated
dynamically, like code below! I can't do it with touples.

key=[]
for up in uplinks:
key.append(up.state(0))

and, later, modifying it like this:
key[2]=up.next_state()
...
print CPT[key]

Any suggestions?

Alexander, zatv@bk.ru

Google