Is there an operation which can change position of elements within a tuple, like for instance I have a tuple ('a', 'b') and I want to change it to ('b', 'a')

Yes it can be done by writing into a new tuple but I was wondering if there is an operation which could do it for me.

CodePudding user response：

No, tuples are immutable. Once it's created, it cannot be changed.

If all you want is an operation to write the changed order into a new tuple, you can use indexing. For two elements that looks like this:

mytuple = ('a', 'b')
mytuple = mytuple[1], mytuple[0]

The result is still a new tuple but stored at the same name ("mytuple").

CodePudding user response：

Well since tuples are immutable, so once its created you won't be able to change it directly. To create the tuple you want, this should work.

tuple_1 = (1, 2)
tuple_2 = tuple_1[::-1]

The answer will be reversed, in a tuple, but not the same tuple.

CodePudding user response：

tuples are immutable objects in python, so you can't do this without creating a new tuple. bit of an explanation here: python tuple is immutable - so why can I add elements to it

one way you could do this (if it will only ever be two elements in the tuple) is:

my_tuple = my_tuple[1], my_tuple[0]