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Hello, guys! ... First of all, I'm very new to sage and this forum, so please be generous for my question, please...

So, I've wrote in sage (between @@@@@'s):








Then, the result for p and q was

p=[2,3,1] and q=[2,3,1].

But, what I actually want is that p doesn't change; so I want to have

p=[3,2,1] and q=[2,3,1]

so that p doesn't get changed when we set 'q=p', while q is defined to be p when we set 'q=p' and then q get changed via the codes followed by 'q=p' above... In other words, is there a way to 'overwrite' q to be p, and not changing p? Thank you!!!