Ad hoc lists vs ad hoc tuples

Iain King iainking at
Wed Jan 27 13:22:30 CET 2010

On Jan 27, 10:20 am, Floris Bruynooghe <floris.bruynoo... at>
> One thing I ofter wonder is which is better when you just need a
> throwaway sequence: a list or a tuple?  E.g.:
> if foo in ['some', 'random', 'strings']:
>     ...
> if [bool1, bool2, boo3].count(True) != 1:
>    ...
> (The last one only works with tuples since python 2.6)
> Is a list or tuple better or more efficient in these situations?
> Regards
> Floris
> PS: This is inspired by some of the space-efficiency comments from the
> list.pop(0) discussion.

I tend to use tuples unless using a list makes it easier to read.  For

if foo in ('some', 'random', 'strings'):

draw.text((10,30), "WHICH IS WHITE", font=font)
draw.line([(70,25), (85,25), (105,45)])

I've no idea what the performance difference is; I've always assumed
it's negligible.


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