[Python] How to create a reference to a variable in python?

In the code:

y = 7
x = y
x = 8


y will be 7 and x will be 8. But I actually want changing x to change y at the same time. Can I assign the reference of y and do that?

For example, in C++ the same thing can be achieved with:

int y = 8;
int &x = y;
x = 9;


Now, both y and x will be 9.

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