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This is just some syntax sugar:

 

Since set literals will change to for example {1,2,3} from set(\[1,2,3\])  and set comprehensions will be specified inside {} I feel that {} will be more naturally associated with sets than dicts (or at least as much).

 

What if the empty set literal is changed to {} and an empty dict literal changed to {:}. Performing the conversion automatically wouldn't be so complex and also un-ambiguous. The hardest thing to change would be the mentality then.

 

i.e:

{} ::= set(\[\])

{1,2,3} ::= set(\[1,2,3\])

{x for x in y} ::= set(x for x in y)

{:} ::= dict()

 

{a:b, h:j} is a dict since it contains colons.

 

I hope this isn't a stupid suggestion (I'm new here).

 

-Neville