Dict when defining not returning multi value key error
Marko Rauhamaa
marko at pacujo.net
Fri Aug 1 11:39:30 EDT 2014
Chris Angelico <rosuav at gmail.com>:
>> but hash(x) == hash(y) does NOT imply that x == y.
>
> Hello, pigeonhole principle :) If this were false - that is, if equal
> hashes DID imply equal objects - it would be necessary to completely
> encode an object's state in its hash, and hashes would be impossibly
> large. This would, in fact, destroy their value completely.
Well, modern computing assumes precisely:
hash(x) == hash(y) => x == y
That principle is at play with strong authentication (HTTPS et al),
version control (git et al),
A handful of bits uniquely identify an object regardless of its size.
Marko
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