How can i transformation this code in sage?

edit

Could you indent correctly your code so that we can read something (put 4 spaces at each begining of line)

this
is
nicely indented
code

Moreover, what is your question?

Is this aimed to provide a solution to an exercise given at https://ask.sagemath.org/question/398... ?

To display inline code, like f, use backticks.

To display blocks of code or error messages, separate them by a blank line from the rest of the text, and do one of the following (all give the same result):

• indent all code lines with 4 spaces
• select code lines and click the "code" button (the icon with '101 010')
• select code lines and hit ctrl-K

For instance, typing

If we define `f` by

    def f(x, y):
        return (x, y)

then `f(2, 3)` returns `(2, 3)` but `f(2)` gives:

    TypeError: f() takes exactly 2 arguments (1 given)

produces:

If we define f by

def f(x, y):
    return (x, y)

then f(2, 3) returns (2, 3) but f(2) gives:

TypeError: f() takes exactly 2 arguments (1 given)

Please edit your question to do that.