Can tuples be replaced with lists all the time?
roy at panix.com
Sun Feb 23 05:19:22 CET 2014
In article <64af70e3-6876-4fbf-8386-330d2f48735a at googlegroups.com>,
Sam <lightaiyee at gmail.com> wrote:
> My understanding of Python tuples is that they are like immutable lists. If
> this is the cause, why can't we replace tuples with lists all the time (just
> don't reassign the lists)? Correct me if I am wrong.
There are many tasks for which either a list or a tuple would work fine.
But, not all. Basically:
If you need something which is hashable (i.e. to be used as a dictionary
key), you need to use a tuple.
If you need something which you can mutate (say, to accumulate items as
you go through a loop), then you need to use a list.
Beyond that, you get into religious territory.
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