ways to declare empty set variable

[Steve Holden]

Boris Borcic wrote:
> Steve Holden wrote:
[...]
>> Before you have any code is exactly the *wrong* time to be considering 
>> performance.
> 
> Yeah right, [] and {} are premature optimizations, one should always use list() 
> or dict() unless one detains figures to justify the more exotic forms :)
> 
:-)

My natural inclination would be to go for the  literal forms where they 
are available, but that would be for readability rather than speed. If 
just happens to be a double win. It's about four years since I wrote a 
program that ran for more than 24 hours.

regards
  Steve
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