[Python-Dev] chained assignment weirdity

[Serhiy Storchaka]

On 06.11.12 14:01, Nick Coghlan wrote:
> Python, on the other hand, is able to preserve primarily left to right
> evaluation in this case with only the far right hand expression needing
> to be evaluated out of order.

I'm surprised, but it is really so.

   >>> {}[print('foo')] = print('bar')
   bar
   foo

I was expecting "foo" before "bar".

Another counterintuitive (and possible wrong) example:

   >>> {print('foo'): print('bar')}
   bar
   foo
   {None: None}